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Delta Chat Core C Interface
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Delta Chat Core C Interface
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#include <deltachat.h>
Public Member Functions | |
| void | dc_accept_chat (dc_context_t *context, uint32_t chat_id) |
| Accept a contact request chat. More... | |
| int | dc_add_address_book (dc_context_t *context, const char *addr_book) |
| Add a number of contacts. More... | |
| int | dc_add_contact_to_chat (dc_context_t *context, uint32_t chat_id, uint32_t contact_id) |
| Add a member to a group. More... | |
| uint32_t | dc_add_device_msg (dc_context_t *context, const char *label, dc_msg_t *msg) |
| Add a message to the device-chat. More... | |
| void | dc_block_chat (dc_context_t *context, uint32_t chat_id) |
| Block a chat. More... | |
| void | dc_block_contact (dc_context_t *context, uint32_t contact_id, int block) |
| Block or unblock a contact. More... | |
| dc_lot_t * | dc_chatlist_get_summary2 (dc_context_t *context, uint32_t chat_id, uint32_t msg_id) |
| Create a chatlist summary item when the chatlist object is already unref()'d. More... | |
| dc_lot_t * | dc_check_qr (dc_context_t *context, const char *qr) |
| Check a scanned QR code. More... | |
| void | dc_configure (dc_context_t *context) |
| Configure a context. More... | |
| dc_context_t * | dc_context_new (const char *os_name, const char *dbfile, const char *blobdir) |
| Create a new context object. More... | |
| void | dc_context_unref (dc_context_t *context) |
| Free a context object. More... | |
| int | dc_continue_key_transfer (dc_context_t *context, uint32_t msg_id, const char *setup_code) |
| Continue the Autocrypt Key Transfer on another device. More... | |
| uint32_t | dc_create_broadcast_list (dc_context_t *context) |
| Create a new broadcast list. More... | |
| uint32_t | dc_create_chat_by_contact_id (dc_context_t *context, uint32_t contact_id) |
| Create a normal chat with a single user. More... | |
| uint32_t | dc_create_contact (dc_context_t *context, const char *name, const char *addr) |
| Add a single contact as a result of an explicit user action. More... | |
| uint32_t | dc_create_group_chat (dc_context_t *context, int protect, const char *name) |
| Create a new group chat. More... | |
| void | dc_delete_all_locations (dc_context_t *context) |
| Delete all locations on the current device. More... | |
| void | dc_delete_chat (dc_context_t *context, uint32_t chat_id) |
| Delete a chat. More... | |
| int | dc_delete_contact (dc_context_t *context, uint32_t contact_id) |
| Delete a contact. More... | |
| void | dc_delete_msgs (dc_context_t *context, const uint32_t *msg_ids, int msg_cnt) |
| Delete messages. More... | |
| void | dc_download_full_msg (dc_context_t *context, int msg_id) |
| Asks the core to start downloading a message fully. More... | |
| int | dc_estimate_deletion_cnt (dc_context_t *context, int from_server, int64_t seconds) |
Estimate the number of messages that will be deleted by the dc_set_config()-options delete_device_after or delete_server_after. More... | |
| void | dc_forward_msgs (dc_context_t *context, const uint32_t *msg_ids, int msg_cnt, uint32_t chat_id) |
| Forward messages to another chat. More... | |
| char * | dc_get_blobdir (const dc_context_t *context) |
| Get the blob directory. More... | |
| int | dc_get_blocked_cnt (dc_context_t *context) |
| Get the number of blocked contacts. More... | |
| dc_array_t * | dc_get_blocked_contacts (dc_context_t *context) |
| Get blocked contacts. More... | |
| dc_chat_t * | dc_get_chat (dc_context_t *context, uint32_t chat_id) |
| Get chat object by a chat ID. More... | |
| dc_array_t * | dc_get_chat_contacts (dc_context_t *context, uint32_t chat_id) |
| Get contact IDs belonging to a chat. More... | |
| char * | dc_get_chat_encrinfo (dc_context_t *context, uint32_t chat_id) |
| Get encryption info for a chat. More... | |
| uint32_t | dc_get_chat_ephemeral_timer (dc_context_t *context, uint32_t chat_id) |
| Get the chat's ephemeral message timer. More... | |
| uint32_t | dc_get_chat_id_by_contact_id (dc_context_t *context, uint32_t contact_id) |
| Check, if there is a normal chat with a given contact. More... | |
| dc_array_t * | dc_get_chat_media (dc_context_t *context, uint32_t chat_id, int msg_type, int msg_type2, int msg_type3) |
| Returns all message IDs of the given types in a chat. More... | |
| dc_array_t * | dc_get_chat_msgs (dc_context_t *context, uint32_t chat_id, uint32_t flags, uint32_t marker1before) |
| Get all message IDs belonging to a chat. More... | |
| dc_chatlist_t * | dc_get_chatlist (dc_context_t *context, int flags, const char *query_str, uint32_t query_id) |
| Get a list of chats. More... | |
| char * | dc_get_config (dc_context_t *context, const char *key) |
| Get a configuration option. More... | |
| int | dc_get_connectivity (dc_context_t *context) |
| Get the current connectivity, i.e. More... | |
| char * | dc_get_connectivity_html (dc_context_t *context) |
| Get an overview of the current connectivity, and possibly more statistics. More... | |
| dc_contact_t * | dc_get_contact (dc_context_t *context, uint32_t contact_id) |
| Get a single contact object. More... | |
| char * | dc_get_contact_encrinfo (dc_context_t *context, uint32_t contact_id) |
| Get encryption info for a contact. More... | |
| dc_array_t * | dc_get_contacts (dc_context_t *context, uint32_t flags, const char *query) |
| Returns known and unblocked contacts. More... | |
| dc_msg_t * | dc_get_draft (dc_context_t *context, uint32_t chat_id) |
| Get draft for a chat, if any. More... | |
| dc_event_emitter_t * | dc_get_event_emitter (dc_context_t *context) |
| Create the event emitter that is used to receive events. More... | |
| int | dc_get_fresh_msg_cnt (dc_context_t *context, uint32_t chat_id) |
| Get the number of fresh messages in a chat. More... | |
| dc_array_t * | dc_get_fresh_msgs (dc_context_t *context) |
| Returns the message IDs of all fresh messages of any chat. More... | |
| uint32_t | dc_get_id (dc_context_t *context) |
| Get the ID of a context object. More... | |
| char * | dc_get_info (const dc_context_t *context) |
| Get information about the context. More... | |
| char * | dc_get_last_error (dc_context_t *context) |
| Get last error string. More... | |
| dc_array_t * | dc_get_locations (dc_context_t *context, uint32_t chat_id, uint32_t contact_id, int64_t timestamp_begin, int64_t timestamp_end) |
| Get shared locations from the database. More... | |
| char * | dc_get_mime_headers (dc_context_t *context, uint32_t msg_id) |
| Get the raw mime-headers of the given message. More... | |
| dc_msg_t * | dc_get_msg (dc_context_t *context, uint32_t msg_id) |
| Get a single message object of the type dc_msg_t. More... | |
| int | dc_get_msg_cnt (dc_context_t *context, uint32_t chat_id) |
| Get the total number of messages in a chat. More... | |
| char * | dc_get_msg_html (dc_context_t *context, uint32_t msg_id) |
| Get uncut message, if available. More... | |
| char * | dc_get_msg_info (dc_context_t *context, uint32_t msg_id) |
| Get an informational text for a single message. More... | |
| uint32_t | dc_get_next_media (dc_context_t *context, uint32_t msg_id, int dir, int msg_type, int msg_type2, int msg_type3) |
| Search next/previous message based on a given message and a list of types. More... | |
| char * | dc_get_oauth2_url (dc_context_t *context, const char *addr, const char *redirect_uri) |
| Get url that can be used to initiate an OAuth2 authorisation. More... | |
| char * | dc_get_securejoin_qr (dc_context_t *context, uint32_t chat_id) |
| Get QR code text that will offer an Setup-Contact or Verified-Group invitation. More... | |
| char * | dc_get_securejoin_qr_svg (dc_context_t *context, uint32_t chat_id) |
| Get QR code image from the QR code text generated by dc_get_securejoin_qr(). More... | |
| void | dc_imex (dc_context_t *context, int what, const char *param1, const char *param2) |
| Import/export things. More... | |
| char * | dc_imex_has_backup (dc_context_t *context, const char *dir) |
| Check if there is a backup file. More... | |
| char * | dc_initiate_key_transfer (dc_context_t *context) |
| Initiate Autocrypt Setup Transfer. More... | |
| int | dc_is_configured (const dc_context_t *context) |
| Check if the context is already configured. More... | |
| int | dc_is_contact_in_chat (dc_context_t *context, uint32_t chat_id, uint32_t contact_id) |
| Check if a given contact ID is a member of a group chat. More... | |
| int | dc_is_sending_locations_to_chat (dc_context_t *context, uint32_t chat_id) |
| Check if location streaming is enabled. More... | |
| uint32_t | dc_join_securejoin (dc_context_t *context, const char *qr) |
| Continue a Setup-Contact or Verified-Group-Invite protocol started on another device with dc_get_securejoin_qr(). More... | |
| uint32_t | dc_lookup_contact_id_by_addr (dc_context_t *context, const char *addr) |
| Check if an e-mail address belongs to a known and unblocked contact. More... | |
| void | dc_marknoticed_chat (dc_context_t *context, uint32_t chat_id) |
| Mark all messages in a chat as noticed. More... | |
| void | dc_markseen_msgs (dc_context_t *context, const uint32_t *msg_ids, int msg_cnt) |
| Mark messages as presented to the user. More... | |
| int | dc_may_be_valid_addr (const char *addr) |
| Rough check if a string may be a valid e-mail address. More... | |
| void | dc_maybe_network (dc_context_t *context) |
| This function should be called when there is a hint that the network is available again, e.g. More... | |
| int | dc_preconfigure_keypair (dc_context_t *context, const char *addr, const char *public_data, const char *secret_data) |
| Save a keypair as the default keys for the user. More... | |
| uint32_t | dc_prepare_msg (dc_context_t *context, uint32_t chat_id, dc_msg_t *msg) |
| Prepare a message for sending. More... | |
| int | dc_remove_contact_from_chat (dc_context_t *context, uint32_t chat_id, uint32_t contact_id) |
| Remove a member from a group. More... | |
| dc_array_t * | dc_search_msgs (dc_context_t *context, uint32_t chat_id, const char *query) |
| Search messages containing the given query string. More... | |
| void | dc_send_locations_to_chat (dc_context_t *context, uint32_t chat_id, int seconds) |
| Enable or disable location streaming for a chat. More... | |
| uint32_t | dc_send_msg (dc_context_t *context, uint32_t chat_id, dc_msg_t *msg) |
| Send a message defined by a dc_msg_t object to a chat. More... | |
| uint32_t | dc_send_msg_sync (dc_context_t *context, uint32_t chat_id, dc_msg_t *msg) |
| Send a message defined by a dc_msg_t object to a chat, synchronously. More... | |
| uint32_t | dc_send_text_msg (dc_context_t *context, uint32_t chat_id, const char *text_to_send) |
| Send a simple text message a given chat. More... | |
| uint32_t | dc_send_videochat_invitation (dc_context_t *context, uint32_t chat_id) |
| Send invitation to a videochat. More... | |
| int | dc_set_chat_ephemeral_timer (dc_context_t *context, uint32_t chat_id, uint32_t timer) |
| Set the chat's ephemeral message timer. More... | |
| int | dc_set_chat_mute_duration (dc_context_t *context, uint32_t chat_id, int64_t duration) |
| Set mute duration of a chat. More... | |
| int | dc_set_chat_name (dc_context_t *context, uint32_t chat_id, const char *name) |
| Set group name. More... | |
| int | dc_set_chat_profile_image (dc_context_t *context, uint32_t chat_id, const char *image) |
| Set group profile image. More... | |
| int | dc_set_chat_protection (dc_context_t *context, uint32_t chat_id, int protect) |
| Enable or disable protection against active attacks. More... | |
| void | dc_set_chat_visibility (dc_context_t *context, uint32_t chat_id, int visibility) |
| Set chat visibility to pinned, archived or normal. More... | |
| int | dc_set_config (dc_context_t *context, const char *key, const char *value) |
| Configure the context. More... | |
| int | dc_set_config_from_qr (dc_context_t *context, const char *qr) |
| Set configuration values from a QR code. More... | |
| void | dc_set_draft (dc_context_t *context, uint32_t chat_id, dc_msg_t *msg) |
| Save a draft for a chat in the database. More... | |
| int | dc_set_location (dc_context_t *context, double latitude, double longitude, double accuracy) |
| Set current location. More... | |
| int | dc_set_stock_translation (dc_context_t *context, uint32_t stock_id, const char *stock_msg) |
| Set stock string translation. More... | |
| void | dc_start_io (dc_context_t *context) |
| Start job and IMAP/SMTP tasks. More... | |
| void | dc_stop_io (dc_context_t *context) |
| Stop job, IMAP, SMTP and other tasks and return when they are finished. More... | |
| void | dc_stop_ongoing_process (dc_context_t *context) |
| Signal an ongoing process to stop. More... | |
| void | dc_str_unref (char *str) |
| Release a string returned by another deltachat-core function. More... | |
| int | dc_was_device_msg_ever_added (dc_context_t *context, const char *label) |
| Check if a device-message with a given label was ever added. More... | |
An object representing a single account.
Each account is linked to an IMAP/SMTP account and uses a separate SQLite database for offline functionality and for account-related settings.
| void dc_accept_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Accept a contact request chat.
Use it to accept "contact request" chats as indicated by dc_chat_is_contact_request().
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to accept. |
| int dc_add_address_book | ( | dc_context_t * | context, |
| const char * | addr_book | ||
| ) |
Add a number of contacts.
Typically used to add the whole address book from the OS. As names here are typically not well formatted, we call normalize() for each name given.
No email-address is added twice. Trying to add email-addresses that are already in the contact list, results in updating the name unless the name was changed manually by the user. If any email-address or any name is really updated, the event DC_EVENT_CONTACTS_CHANGED is sent.
To add a single contact entered by the user, you should prefer dc_create_contact(), however, for adding a bunch of addresses, this function is much faster.
| context | the context object. |
| addr_book | A multi-line string in the format Name one\nAddress one\nName two\nAddress two. If an email address already exists, the name is updated unless it was edited manually by dc_create_contact() before. |
| int dc_add_contact_to_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | contact_id | ||
| ) |
Add a member to a group.
If the group is already promoted (any message was sent to the group), all group members are informed by a special status message that is sent automatically by this function.
If the group has group protection enabled, only verified contacts can be added to the group.
Sends out DC_EVENT_CHAT_MODIFIED and DC_EVENT_MSGS_CHANGED if a status message was sent.
| context | The context object. |
| chat_id | The chat ID to add the contact to. Must be a group chat. |
| contact_id | The contact ID to add to the chat. |
| uint32_t dc_add_device_msg | ( | dc_context_t * | context, |
| const char * | label, | ||
| dc_msg_t * | msg | ||
| ) |
Add a message to the device-chat.
Device-messages usually contain update information and some hints that are added during the program runs, multi-device etc. The device-message may be defined by a label; if a message with the same label was added or skipped before, the message is not added again, even if the message was deleted in between. If needed, the device-chat is created before.
Sends the event DC_EVENT_MSGS_CHANGED on success. To check, if a given chat is a device-chat, see dc_chat_is_device_talk()
| context | The context object. |
| label | A unique name for the message to add. The label is typically not displayed to the user and must be created from the characters A-Z, a-z, 0-9, _ or -. If you pass NULL here, the message is added unconditionally. |
| msg | Message to be added to the device-chat. The message appears to the user as an incoming message. If you pass NULL here, only the given label will be added and block adding messages with that label in the future. |
Example:
| void dc_block_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Block a chat.
Blocking 1:1 chats blocks the corresponding contact. Blocking mailing lists creates a pseudo-contact in the list of blocked contacts, so blocked mailing lists can be discovered and unblocked the same way as the contacts. Blocking group chats deletes the chat without blocking any contacts, so it may pop up again later.
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to block. |
| void dc_block_contact | ( | dc_context_t * | context, |
| uint32_t | contact_id, | ||
| int | block | ||
| ) |
Block or unblock a contact.
May result in a DC_EVENT_CONTACTS_CHANGED event.
| context | The context object. |
| contact_id | The ID of the contact to block or unblock. |
| block | 1=block contact, 0=unblock contact |
| dc_lot_t * dc_chatlist_get_summary2 | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | msg_id | ||
| ) |
Create a chatlist summary item when the chatlist object is already unref()'d.
This function is similar to dc_chatlist_get_summary(), however, takes the chat-id and message id as returned by dc_chatlist_get_chat_id() and dc_chatlist_get_msg_id() as arguments. The chatlist object itself is not needed directly.
This maybe useful if you convert the complete object into a different represenation as done e.g. in the node-bindings. If you have access to the chatlist object in some way, using this function is not recommended, use dc_chatlist_get_summary() in this case instead.
| context | The context object. |
| chat_id | Chat to get a summary for. |
| msg_id | Message to get a summary for. |
| dc_lot_t * dc_check_qr | ( | dc_context_t * | context, |
| const char * | qr | ||
| ) |
Check a scanned QR code.
The function takes the raw text scanned and checks what can be done with it.
The UI is supposed to show the result to the user. In case there are further actions possible, the UI has to ask the user before doing further steps.
The QR code state is returned in dc_lot_t::state as:
| context | The context object. |
| qr | The text of the scanned QR code. |
| void dc_configure | ( | dc_context_t * | context | ) |
Configure a context.
During configuration IO must not be started, if needed stop IO using dc_accounts_stop_io() or dc_stop_io() first. If the context is already configured, this function will try to change the configuration.
addr and mail_pw using dc_set_config().mail_user to use a different user name than addr and send_pw to use a different password for the SMTP server.mail_server, mail_port, send_server, send_port, send_user or server_flags are specified, autoconfigure/autodiscover is skipped.While dc_configure() returns immediately, the started configuration-job may take a while.
During configuration, DC_EVENT_CONFIGURE_PROGRESS events are emmited; they indicate a successful configuration as well as errors and may be used to create a progress bar.
Additional calls to dc_configure() while a config-job is running are ignored. To interrupt a configuration prematurely, use dc_stop_ongoing_process(); this is not needed if DC_EVENT_CONFIGURE_PROGRESS reports success.
If DC_EVENT_CONFIGURE_PROGRESS reports failure, the core continues to use the last working configuration and parameters as addr, mail_pw etc. are set to that.
| context | The context object. |
There is no need to call dc_configure() on every program start, the configuration result is saved in the database and you can use the connection directly:
| dc_context_t * dc_context_new | ( | const char * | os_name, |
| const char * | dbfile, | ||
| const char * | blobdir | ||
| ) |
Create a new context object.
After creation it is usually opened, connected and mails are fetched.
| os_name | is only for decorative use. You can give the name of the app, the operating system, the used environment and/or the version here. |
| dbfile | The file to use to store the database, something like ~/file won't work, use absolute paths. |
| blobdir | Deprecated, pass NULL or an empty string here. |
If you want to use multiple context objects at the same time, this can be managed using dc_accounts_t.
| void dc_context_unref | ( | dc_context_t * | context | ) |
Free a context object.
You have to call this function also for accounts returned by dc_accounts_get_account() or dc_accounts_get_selected_account().
| context | The context object as created by dc_context_new(), dc_accounts_get_account() or dc_accounts_get_selected_account(). If NULL is given, nothing is done. |
| int dc_continue_key_transfer | ( | dc_context_t * | context, |
| uint32_t | msg_id, | ||
| const char * | setup_code | ||
| ) |
Continue the Autocrypt Key Transfer on another device.
If you have started the key transfer on another device using dc_initiate_key_transfer() and you've detected a setup message with dc_msg_is_setupmessage(), you should prompt the user for the setup code and call this function then.
You can use dc_msg_get_setupcodebegin() to give the user a hint about the code (useful if the user has created several messages and should not enter the wrong code).
| context | The context object. |
| msg_id | ID of the setup message to decrypt. |
| setup_code | Setup code entered by the user. This is the same setup code as returned from dc_initiate_key_transfer() on the other device. There is no need to format the string correctly, the function will remove all spaces and other characters and insert the - characters at the correct places. |
| uint32_t dc_create_broadcast_list | ( | dc_context_t * | context | ) |
Create a new broadcast list.
Broadcast lists are similar to groups on the sending device, however, recipients get the messages in normal one-to-one chats and will not be aware of other members.
Replies to broadcasts go only to the sender and not to all broadcast recipients. Moreover, replies will not appear in the broadcast list but in the one-to-one chat with the person answering.
The name and the image of the broadcast list is set automatically and is visible to the sender only. Not asking for these data allows more focused creation and we bypass the question who will get which data. Also, many users will have at most one broadcast list so, a generic name and image is sufficient at the first place.
Later on, however, the name can be changed using dc_set_chat_name(). The image cannot be changed to have a unique, recognizable icon in the chat lists. All in all, this is also what other messengers are doing here.
| context | The context object. |
| uint32_t dc_create_chat_by_contact_id | ( | dc_context_t * | context, |
| uint32_t | contact_id | ||
| ) |
Create a normal chat with a single user.
To create group chats, see dc_create_group_chat().
If a chat already exists, this ID is returned, otherwise a new chat is created; to get the chat messages, use dc_get_chat_msgs().
| context | The context object as returned from dc_context_new(). |
| contact_id | The contact ID to create the chat for. If there is already a chat with this contact, the already existing ID is returned. |
| uint32_t dc_create_contact | ( | dc_context_t * | context, |
| const char * | name, | ||
| const char * | addr | ||
| ) |
Add a single contact as a result of an explicit user action.
We assume, the contact name, if any, is entered by the user and is used "as is" therefore, normalize() is not called for the name. If the contact is blocked, it is unblocked.
To add a number of contacts, see dc_add_address_book() which is much faster for adding a bunch of addresses.
May result in a DC_EVENT_CONTACTS_CHANGED event.
| context | The context object. |
| name | Name of the contact to add. If you do not know the name belonging to the address, you can give NULL here. |
| addr | E-mail-address of the contact to add. If the email address already exists, the name is updated and the origin is increased to "manually created". |
| uint32_t dc_create_group_chat | ( | dc_context_t * | context, |
| int | protect, | ||
| const char * | name | ||
| ) |
Create a new group chat.
After creation, the draft of the chat is set to a default text, the group has one member with the ID DC_CONTACT_ID_SELF and is in unpromoted state. This means, you can add or remove members, change the name, the group image and so on without messages being sent to all group members.
This changes as soon as the first message is sent to the group members and the group becomes promoted. After that, all changes are synced with all group members by sending status message.
To check, if a chat is still unpromoted, you dc_chat_is_unpromoted(). This may be useful if you want to show some help for just created groups.
| context | The context object. |
| protect | If set to 1 the function creates group with protection initially enabled. Only verified members are allowed in these groups and end-to-end-encryption is always enabled. |
| name | The name of the group chat to create. The name may be changed later using dc_set_chat_name(). To find out the name of a group later, see dc_chat_get_name() |
| void dc_delete_all_locations | ( | dc_context_t * | context | ) |
Delete all locations on the current device.
Locations already sent cannot be deleted.
Typically results in the event DC_EVENT_LOCATION_CHANGED with contact_id set to 0.
| context | The context object. |
| void dc_delete_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Delete a chat.
Messages are deleted from the device and the chat database entry is deleted. After that, the event DC_EVENT_MSGS_CHANGED is posted.
Things that are not done implicitly:
To leave a chat explicitly, use dc_remove_contact_from_chat() with chat_id=DC_CONTACT_ID_SELF)
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to delete. |
| int dc_delete_contact | ( | dc_context_t * | context, |
| uint32_t | contact_id | ||
| ) |
Delete a contact.
The contact is deleted from the local device. It may happen that this is not possible as the contact is in use. In this case, the contact can be blocked.
May result in a DC_EVENT_CONTACTS_CHANGED event.
| context | The context object. |
| contact_id | ID of the contact to delete. |
| void dc_delete_msgs | ( | dc_context_t * | context, |
| const uint32_t * | msg_ids, | ||
| int | msg_cnt | ||
| ) |
Delete messages.
The messages are deleted on the current device and on the IMAP server.
| context | The context object |
| msg_ids | an array of uint32_t containing all message IDs that should be deleted |
| msg_cnt | The number of messages IDs in the msg_ids array |
| void dc_download_full_msg | ( | dc_context_t * | context, |
| int | msg_id | ||
| ) |
Asks the core to start downloading a message fully.
This function is typically called when the user hits the "Download" button that is shown by the UI in case dc_msg_get_download_state() returns DC_DOWNLOAD_AVAILABLE or DC_DOWNLOAD_FAILURE.
On success, the view type of the message may change or the message may be replaced completely by one or more messages with other message ids. That may happen eg. in cases where the message was encrypted and the type could not be determined without fully downloading. Downloaded content can be accessed as usual after download, eg. using dc_msg_get_file().
To reflect these changes a DC_EVENT_MSGS_CHANGED event will be emitted.
| context | The context object. |
| msg_id | Message ID to download the content for. |
| int dc_estimate_deletion_cnt | ( | dc_context_t * | context, |
| int | from_server, | ||
| int64_t | seconds | ||
| ) |
Estimate the number of messages that will be deleted by the dc_set_config()-options delete_device_after or delete_server_after.
This is typically used to show the estimated impact to the user before actually enabling deletion of old messages.
| context | The context object as returned from dc_context_new(). |
| from_server | 1=Estimate deletion count for server, 0=Estimate deletion count for device |
| seconds | Count messages older than the given number of seconds. |
show_emails option. Messages in the "saved messages" folder are not counted as they will not be deleted automatically. | void dc_forward_msgs | ( | dc_context_t * | context, |
| const uint32_t * | msg_ids, | ||
| int | msg_cnt, | ||
| uint32_t | chat_id | ||
| ) |
Forward messages to another chat.
| context | The context object. |
| msg_ids | An array of uint32_t containing all message IDs that should be forwarded |
| msg_cnt | The number of messages IDs in the msg_ids array |
| chat_id | The destination chat ID. |
| char * dc_get_blobdir | ( | const dc_context_t * | context | ) |
Get the blob directory.
| context | The context object. |
| int dc_get_blocked_cnt | ( | dc_context_t * | context | ) |
Get the number of blocked contacts.
| context | The context object. |
| dc_array_t * dc_get_blocked_contacts | ( | dc_context_t * | context | ) |
Get blocked contacts.
| context | The context object. |
| dc_chat_t * dc_get_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get chat object by a chat ID.
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to get the chat object for. |
| dc_array_t * dc_get_chat_contacts | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get contact IDs belonging to a chat.
| context | The context object as returned from dc_context_new(). |
| chat_id | Chat ID to get the belonging contact IDs for. |
| char * dc_get_chat_encrinfo | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get encryption info for a chat.
Get a multi-line encryption info, containing encryption preferences of all members. Can be used to find out why messages sent to group are not encrypted.
| context | The context object. |
| chat_id | ID of the chat to get the encryption info for. |
| uint32_t dc_get_chat_ephemeral_timer | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get the chat's ephemeral message timer.
The ephemeral message timer is set by dc_set_chat_ephemeral_timer() on this or any other device participating in the chat.
| context | The context object. |
| chat_id | The chat ID. |
| uint32_t dc_get_chat_id_by_contact_id | ( | dc_context_t * | context, |
| uint32_t | contact_id | ||
| ) |
Check, if there is a normal chat with a given contact.
To get the chat messages, use dc_get_chat_msgs().
| context | The context object as returned from dc_context_new(). |
| contact_id | The contact ID to check. |
| dc_array_t * dc_get_chat_media | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| int | msg_type, | ||
| int | msg_type2, | ||
| int | msg_type3 | ||
| ) |
Returns all message IDs of the given types in a chat.
Typically used to show a gallery. The result must be dc_array_unref()'d
The list is already sorted and starts with the oldest message. Clients should not try to re-sort the list as this would be an expensive action and would result in inconsistencies between clients.
| context | The context object as returned from dc_context_new(). |
| chat_id | The chat ID to get all messages with media from. |
| msg_type | Specify a message type to query here, one of the DC_MSG constants. |
| msg_type2 | Alternative message type to search for. 0 to skip. |
| msg_type3 | Alternative message type to search for. 0 to skip. |
| dc_array_t * dc_get_chat_msgs | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | flags, | ||
| uint32_t | marker1before | ||
| ) |
Get all message IDs belonging to a chat.
The list is already sorted and starts with the oldest message. Clients should not try to re-sort the list as this would be an expensive action and would result in inconsistencies between clients.
Optionally, some special markers added to the ID-array may help to implement virtual lists.
| context | The context object as returned from dc_context_new(). |
| chat_id | The chat ID of which the messages IDs should be queried. |
| flags | If set to DC_GCM_ADDDAYMARKER, the marker DC_MSG_ID_DAYMARKER will be added before each day (regarding the local timezone). Set this to 0 if you do not want this behaviour. To get the concrete time of the marker, use dc_array_get_timestamp(). If set to DC_GCM_INFO_ONLY, only system messages will be returned, can be combined with DC_GCM_ADDDAYMARKER. |
| marker1before | An optional message ID. If set, the id DC_MSG_ID_MARKER1 will be added just before the given ID in the returned array. Set this to 0 if you do not want this behaviour. |
| dc_chatlist_t * dc_get_chatlist | ( | dc_context_t * | context, |
| int | flags, | ||
| const char * | query_str, | ||
| uint32_t | query_id | ||
| ) |
Get a list of chats.
The list can be filtered by query parameters.
The list is already sorted and starts with the most recent chat in use. The sorting takes care of invalid sending dates, drafts and chats without messages. Clients should not try to re-sort the list as this would be an expensive action and would result in inconsistencies between clients.
To get information about each entry, use e.g. dc_chatlist_get_summary().
By default, the function adds some special entries to the list. These special entries can be identified by the ID returned by dc_chatlist_get_chat_id():
| context | The context object as returned by dc_context_new() |
| flags | A combination of flags:
|
| query_str | An optional query for filtering the list. Only chats matching this query are returned. Give NULL for no filtering. |
| query_id | An optional contact ID for filtering the list. Only chats including this contact ID are returned. Give 0 for no filtering. |
See also: dc_get_chat_msgs() to get the messages of a single chat.
| char * dc_get_config | ( | dc_context_t * | context, |
| const char * | key | ||
| ) |
Get a configuration option.
The configuration option is set by dc_set_config() or by the library itself.
Beside the options shown at dc_set_config(), this function can be used to query some global system values:
sys.version = get the version string e.g. as 1.2.3 or as 1.2.3special4sys.msgsize_max_recommended = maximal recommended attachment size in bytes. All possible overheads are already subtracted and this value can be used e.g. for direct comparison with the size of a file the user wants to attach. If an attachment is larger than this value, an error (no warning as it should be shown to the user) is logged but the attachment is sent anyway.sys.config_keys = get a space-separated list of all config-keys available. The config-keys are the keys that can be passed to the parameter key of this function.quota_exceeding = 0: quota is unknown or in normal range; >=80: quota is about to exceed, the value is the concrete percentage, a device message is added when that happens, however, that value may still be interesting for bots.| context | The context object. For querying system values, this can be NULL. |
| key | The key to query. |
| int dc_get_connectivity | ( | dc_context_t * | context | ) |
Get the current connectivity, i.e.
whether the device is connected to the IMAP server. One of:
We don't use exact values but ranges here so that we can split up states into multiple states in the future.
Meant as a rough overview that can be shown e.g. in the title of the main screen.
If the connectivity changes, a DC_EVENT_CONNECTIVITY_CHANGED will be emitted.
| context | The context object. |
| char * dc_get_connectivity_html | ( | dc_context_t * | context | ) |
Get an overview of the current connectivity, and possibly more statistics.
Meant to give the user more insight about the current status than the basic connectivity info returned by dc_get_connectivity(); show this e.g., if the user taps on said basic connectivity info.
If this page changes, a DC_EVENT_CONNECTIVITY_CHANGED will be emitted.
This comes as an HTML from the core so that we can easily improve it and the improvement instantly reaches all UIs.
| context | The context object. |
| dc_contact_t * dc_get_contact | ( | dc_context_t * | context, |
| uint32_t | contact_id | ||
| ) |
Get a single contact object.
For a list, see e.g. dc_get_contacts().
For contact DC_CONTACT_ID_SELF (1), the function returns sth. like "Me" in the selected language and the email address defined by dc_set_config().
| context | The context object. |
| contact_id | ID of the contact to get the object for. |
| char * dc_get_contact_encrinfo | ( | dc_context_t * | context, |
| uint32_t | contact_id | ||
| ) |
Get encryption info for a contact.
Get a multi-line encryption info, containing your fingerprint and the fingerprint of the contact, used e.g. to compare the fingerprints for a simple out-of-band verification.
| context | The context object. |
| contact_id | ID of the contact to get the encryption info for. |
| dc_array_t * dc_get_contacts | ( | dc_context_t * | context, |
| uint32_t | flags, | ||
| const char * | query | ||
| ) |
Returns known and unblocked contacts.
To get information about a single contact, see dc_get_contact().
| context | The context object. |
| flags | A combination of flags:
|
| query | A string to filter the list. Typically used to implement an incremental search. NULL for no filtering. |
| dc_msg_t * dc_get_draft | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get draft for a chat, if any.
See dc_set_draft() for more details about drafts.
| context | The context object. |
| chat_id | The chat ID to get the draft for. |
| dc_event_emitter_t * dc_get_event_emitter | ( | dc_context_t * | context | ) |
Create the event emitter that is used to receive events.
The library will emit various DC_EVENT events, such as "new message", "message read" etc. To get these events, you have to create an event emitter using this function and call dc_get_next_event() on the emitter.
| context | The context object as created by dc_context_new(). |
Note: Use only one event emitter per context. Having more than one event emitter running at the same time on the same context will result in events being randomly delivered to one of the emitters.
| int dc_get_fresh_msg_cnt | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get the number of fresh messages in a chat.
Typically used to implement a badge with a number in the chatlist.
If the specified chat is muted, the UI should show the badge counter "less obtrusive", eg. using "gray" instead of "red" color.
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to count the messages for. |
| dc_array_t * dc_get_fresh_msgs | ( | dc_context_t * | context | ) |
Returns the message IDs of all fresh messages of any chat.
Typically used for implementing notification summaries or badge counters eg. on the app-icon. The list is already sorted and starts with the most recent fresh message.
Messages belonging to muted chats or to the contact requests are not returned; these messages should not be notified and also badge counters should not include these messages.
To get the number of fresh messages for a single chat, muted or not, use dc_get_fresh_msg_cnt().
| context | The context object as returned from dc_context_new(). |
| uint32_t dc_get_id | ( | dc_context_t * | context | ) |
Get the ID of a context object.
Each context has an ID assigned. If the context was created through the dc_accounts_t account manager, the ID is unique, no other context handled by the account manager will have the same ID. If the context was created by dc_context_new(), a random ID is assigned.
| context | The context object as created e.g. by dc_accounts_get_account() or dc_context_new(). |
| char * dc_get_info | ( | const dc_context_t * | context | ) |
Get information about the context.
The information is returned by a multi-line string and contains information about the current configuration.
If the context is not open or configured only a subset of the information will be available. There is no guarantee about which information will be included when however.
| context | The context object. |
| char * dc_get_last_error | ( | dc_context_t * | context | ) |
Get last error string.
This is the same error string as logged via DC_EVENT_ERROR, however, using this function avoids race conditions if the failing function is called in another thread than dc_get_next_event().
| context | The context object. |
| dc_array_t * dc_get_locations | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | contact_id, | ||
| int64_t | timestamp_begin, | ||
| int64_t | timestamp_end | ||
| ) |
Get shared locations from the database.
The locations can be filtered by the chat-id, the contact-id and by a timespan.
The number of returned locations can be retrieved using dc_array_get_cnt(). To get information for each location, use dc_array_get_latitude(), dc_array_get_longitude(), dc_array_get_accuracy(), dc_array_get_timestamp(), dc_array_get_contact_id() and dc_array_get_msg_id(). The latter returns 0 if there is no message bound to the location.
Note that only if dc_array_is_independent() returns 0, the location is the current or a past position of the user. If dc_array_is_independent() returns 1, the location is any location on earth that is marked by the user.
| context | The context object. |
| chat_id | Chat-id to get location information for. 0 to get locations independently of the chat. |
| contact_id | Contact-id to get location information for. If also a chat-id is given, this should be a member of the given chat. 0 to get locations independently of the contact. |
| timestamp_begin | Start of timespan to return. Must be given in number of seconds since 00:00 hours, Jan 1, 1970 UTC. 0 for "start from the beginning". |
| timestamp_end | End of timespan to return. Must be given in number of seconds since 00:00 hours, Jan 1, 1970 UTC. 0 for "all up to now". |
Examples:
| char * dc_get_mime_headers | ( | dc_context_t * | context, |
| uint32_t | msg_id | ||
| ) |
Get the raw mime-headers of the given message.
Raw headers are saved for incoming messages only if dc_set_config(context, "save_mime_headers", "1") was called before.
| context | The context object. |
| msg_id | The message id, must be the id of an incoming message. |
| dc_msg_t * dc_get_msg | ( | dc_context_t * | context, |
| uint32_t | msg_id | ||
| ) |
Get a single message object of the type dc_msg_t.
For a list of messages in a chat, see dc_get_chat_msgs() For a list or chats, see dc_get_chatlist()
| context | The context object. |
| msg_id | The message ID for which the message object should be created. |
| int dc_get_msg_cnt | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get the total number of messages in a chat.
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to count the messages for. |
| char * dc_get_msg_html | ( | dc_context_t * | context, |
| uint32_t | msg_id | ||
| ) |
Get uncut message, if available.
Delta Chat tries to break the message in simple parts as plain text or images that are retrieved using dc_msg_get_viewtype(), dc_msg_get_text(), dc_msg_get_file() and so on. This works totally fine for Delta Chat to Delta Chat communication, however, when the counterpart uses another E-Mail-client, this has limits:
In these cases, dc_msg_has_html() returns 1 and you can ask dc_get_msg_html() for some HTML-code that shows the uncut text (which is close to the original) For simplicity, the function always returns HTML-code, this removes the need for the UI to deal with different formatting options of PLAIN-parts.
As the title of the full-message-view, you can use the subject (see dc_msg_get_subject()).
Note: The returned HTML-code may contain scripts, external images that may be misused as hidden read-receipts and so on. Taking care of these parts while maintaining compatibility with the then generated HTML-code is not easily doable, if at all. E.g. taking care of tags and attributes is not sufficient, we would have to deal with linked content (e.g. script, css), text (e.g. script-blocks) and values (e.g. javascript-protocol) as well; on this level, we have to deal with encodings, browser peculiarities and so on - and would still risk to oversee something and to break things.
To avoid starting this cat-and-mouse game, and to close this issue in a sustainable way, it is up to the UI to display the HTML-code in an appropriate sandbox environment - that may e.g. be an external browser or a WebView with scripting disabled.
| context | The context object object. |
| msg_id | The message id for which the uncut text should be loaded |
| char * dc_get_msg_info | ( | dc_context_t * | context, |
| uint32_t | msg_id | ||
| ) |
Get an informational text for a single message.
The text is multiline and may contain e.g. the raw text of the message.
The max. text returned is typically longer (about 100000 characters) than the max. text returned by dc_msg_get_text() (about 30000 characters).
| context | The context object object. |
| msg_id | The message id for which information should be generated |
| uint32_t dc_get_next_media | ( | dc_context_t * | context, |
| uint32_t | msg_id, | ||
| int | dir, | ||
| int | msg_type, | ||
| int | msg_type2, | ||
| int | msg_type3 | ||
| ) |
Search next/previous message based on a given message and a list of types.
The Typically used to implement the "next" and "previous" buttons in a gallery or in a media player.
| context | The context object as returned from dc_context_new(). |
| msg_id | This is the current message from which the next or previous message should be searched. |
| dir | 1=get the next message, -1=get the previous one. |
| msg_type | Message type to search for. If 0, the message type from curr_msg_id is used. |
| msg_type2 | Alternative message type to search for. 0 to skip. |
| msg_type3 | Alternative message type to search for. 0 to skip. |
| char * dc_get_oauth2_url | ( | dc_context_t * | context, |
| const char * | addr, | ||
| const char * | redirect_uri | ||
| ) |
Get url that can be used to initiate an OAuth2 authorisation.
If an OAuth2 authorization is possible for a given e-mail-address, this function returns the URL that should be opened in a browser.
If the user authorizes access, the given redirect_uri is called by the provider. It's up to the UI to handle this call.
The provider will attach some parameters to the url, most important the parameter code that should be set as the mail_pw. With server_flags set to DC_LP_AUTH_OAUTH2, dc_configure() can be called as usual afterwards.
| context | The context object. |
| addr | E-mail address the user has entered. In case the user selects a different e-mail-address during authorization, this is corrected in dc_configure() |
| redirect_uri | URL that will get code that is used as mail_pw then. Not all URLs are allowed here, however, the following should work: chat.delta:/PATH, http://localhost:PORT/PATH, https://localhost:PORT/PATH, urn:ietf:wg:oauth:2.0:oob (the latter just displays the code the user can copy+paste then) |
| char * dc_get_securejoin_qr | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get QR code text that will offer an Setup-Contact or Verified-Group invitation.
The QR code is compatible to the OPENPGP4FPR format so that a basic fingerprint comparison also works e.g. with OpenKeychain.
The scanning device will pass the scanned content to dc_check_qr() then; if dc_check_qr() returns DC_QR_ASK_VERIFYCONTACT or DC_QR_ASK_VERIFYGROUP an out-of-band-verification can be joined using dc_join_securejoin()
| context | The context object. |
| chat_id | If set to a group-chat-id, the Verified-Group-Invite protocol is offered in the QR code; works for protected groups as well as for normal groups. If set to 0, the Setup-Contact protocol is offered in the QR code. See https://countermitm.readthedocs.io/en/latest/new.html for details about both protocols. |
| char * dc_get_securejoin_qr_svg | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Get QR code image from the QR code text generated by dc_get_securejoin_qr().
See dc_get_securejoin_qr() for details about the contained QR code.
| context | The context object. |
| chat_id | group-chat-id for secure-join or 0 for setup-contact, see dc_get_securejoin_qr() for details. |
| void dc_imex | ( | dc_context_t * | context, |
| int | what, | ||
| const char * | param1, | ||
| const char * | param2 | ||
| ) |
Import/export things.
During backup import/export IO must not be started, if needed stop IO using dc_accounts_stop_io() or dc_stop_io() first. What to do is defined by the what parameter which may be one of the following:
param1. The backup contains all contacts, chats, images and other data and device independent settings. The backup does not contain device dependent settings as ringtones or LED notification settings. The name of the backup is typically delta-chat-<day>.tar, if more than one backup is create on a day, the format is delta-chat-<day>-<number>.tarparam1 is the file (not: directory) to import. The file is normally created by DC_IMEX_EXPORT_BACKUP and detected by dc_imex_has_backup(). Importing a backup is only possible as long as the context is not configured or used in another way.param1. The default key is written to the files public-key-default.asc and private-key-default.asc, if there are more keys, they are written to files as public-key-<id>.asc and private-key-<id>.ascparam1. The last imported key is made the default keys unless its name contains the string legacy. Public keys are not imported.While dc_imex() returns immediately, the started job may take a while, you can stop it using dc_stop_ongoing_process(). During execution of the job, some events are sent out:
Only one import-/export-progress can run at the same time. To cancel an import-/export-progress, use dc_stop_ongoing_process().
| context | The context. |
| what | One of the DC_IMEX_* constants. |
| param1 | Meaning depends on the DC_IMEX_* constants. If this parameter is a directory, it should not end with a slash (otherwise you'll get double slashes when receiving DC_EVENT_IMEX_FILE_WRITTEN). Set to NULL if not used. |
| param2 | Meaning depends on the DC_IMEX_* constants. Set to NULL if not used. |
| char * dc_imex_has_backup | ( | dc_context_t * | context, |
| const char * | dir | ||
| ) |
Check if there is a backup file.
May only be used on fresh installations (e.g. dc_is_configured() returns 0).
Example:
| context | The context object. |
| dir | Directory to search backups in. |
| char * dc_initiate_key_transfer | ( | dc_context_t * | context | ) |
Initiate Autocrypt Setup Transfer.
Before starting the setup transfer with this function, the user should be asked:
After that, this function should be called to send the Autocrypt Setup Message. The function creates the setup message and waits until it is really sent. As this may take a while, it is recommended to start the function in a separate thread; to interrupt it, you can use dc_stop_ongoing_process().
After everything succeeded, the required setup code is returned in the following format:
The setup code should be shown to the user then:
On the other device you will call dc_continue_key_transfer() then for setup messages identified by dc_msg_is_setupmessage().
For more details about the Autocrypt setup process, please refer to https://autocrypt.org/en/latest/level1.html#autocrypt-setup-message
| context | The context object. |
| int dc_is_configured | ( | const dc_context_t * | context | ) |
Check if the context is already configured.
Typically, for unconfigured accounts, the user is prompted to enter some settings and dc_configure() is called in a thread then.
A once successfully configured context cannot become unconfigured again; if a subsequent call to dc_configure() fails, the prior configuration is used.
However, of course, also a configuration may stop working, as eg. the password was changed on the server. To check that use eg. dc_get_connectivity().
| context | The context object. |
| int dc_is_contact_in_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | contact_id | ||
| ) |
Check if a given contact ID is a member of a group chat.
| context | The context object. |
| chat_id | The chat ID to check. |
| contact_id | The contact ID to check. To check if yourself is member of the chat, pass DC_CONTACT_ID_SELF (1) here. |
| int dc_is_sending_locations_to_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Check if location streaming is enabled.
Location stream can be enabled or disabled using dc_send_locations_to_chat(). If you have already a dc_chat_t object, dc_chat_is_sending_locations() may be more handy.
| context | The context object. |
| chat_id | >0: Check if location streaming is enabled for the given chat. 0: Check of location streaming is enabled for any chat. |
| uint32_t dc_join_securejoin | ( | dc_context_t * | context, |
| const char * | qr | ||
| ) |
Continue a Setup-Contact or Verified-Group-Invite protocol started on another device with dc_get_securejoin_qr().
This function is typically called when dc_check_qr() returns lot.state=DC_QR_ASK_VERIFYCONTACT or lot.state=DC_QR_ASK_VERIFYGROUP.
The function returns immediately and the handshake runs in background, sending and receiving several messages. During the handshake, info messages are added to the chat, showing progress, success or errors.
Subsequent calls of dc_join_securejoin() will abort previous, unfinished handshakes.
See https://countermitm.readthedocs.io/en/latest/new.html for details about both protocols.
| context | The context object |
| qr | The text of the scanned QR code. Typically, the same string as given to dc_check_qr(). |
| uint32_t dc_lookup_contact_id_by_addr | ( | dc_context_t * | context, |
| const char * | addr | ||
| ) |
Check if an e-mail address belongs to a known and unblocked contact.
To get a list of all known and unblocked contacts, use dc_get_contacts().
To validate an e-mail address independently of the contact database use dc_may_be_valid_addr().
| context | The context object. |
| addr | The e-mail-address to check. |
| void dc_marknoticed_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Mark all messages in a chat as noticed.
Noticed messages are no longer fresh and do not count as being unseen but are still waiting for being marked as "seen" using dc_markseen_msgs() (IMAP/MDNs is not done for noticed messages).
Calling this function usually results in the event DC_EVENT_MSGS_NOTICED. See also dc_markseen_msgs().
| context | The context object as returned from dc_context_new(). |
| chat_id | The chat ID of which all messages should be marked as being noticed. |
| void dc_markseen_msgs | ( | dc_context_t * | context, |
| const uint32_t * | msg_ids, | ||
| int | msg_cnt | ||
| ) |
Mark messages as presented to the user.
Typically, UIs call this function on scrolling through the chatlist, when the messages are presented at least for a little moment. The concrete action depends on the type of the chat and on the users settings (dc_msgs_presented() may be a better name therefore, but well :)
mdns_enabled is set) and the internal state is changed to DC_STATE_IN_SEEN to reflect these actions.Moreover, timer is started for incoming ephemeral messages. This also happens for contact requests chats.
One DC_EVENT_MSGS_NOTICED event is emitted per modified chat.
| context | The context object. |
| msg_ids | An array of uint32_t containing all the messages IDs that should be marked as seen. |
| msg_cnt | The number of message IDs in msg_ids. |
| int dc_may_be_valid_addr | ( | const char * | addr | ) |
Rough check if a string may be a valid e-mail address.
The function checks if the string contains a minimal amount of characters before and after the @ and . characters.
To check if a given address is a contact in the contact database use dc_lookup_contact_id_by_addr().
| addr | The e-mail-address to check. |
| void dc_maybe_network | ( | dc_context_t * | context | ) |
This function should be called when there is a hint that the network is available again, e.g.
as a response to system event reporting network availability. The library will try to send pending messages out immediately.
Moreover, to have a reliable state when the app comes to foreground with network available, it may be reasonable to call the function also at that moment.
It is okay to call the function unconditionally when there is network available, however, calling the function without having network may interfere with the backoff algorithm and will led to let the jobs fail faster, with fewer retries and may avoid messages being sent out.
Finally, if the context was created by the dc_accounts_t account manager, use dc_accounts_maybe_network() instead of this function.
| context | The context as created by dc_context_new(). |
| int dc_preconfigure_keypair | ( | dc_context_t * | context, |
| const char * | addr, | ||
| const char * | public_data, | ||
| const char * | secret_data | ||
| ) |
Save a keypair as the default keys for the user.
This API is only for testing purposes and should not be used as part of a normal application, use the import-export APIs instead.
This saves a public/private keypair as the default keypair in the context. It allows avoiding having to generate a secret key for unittests which need one.
| context | The context as created by dc_context_new(). |
| addr | The email address of the user. This must match the configured_addr setting of the context as well as the UID of the key. |
| public_data | ASCII armored public key. |
| secret_data | ASCII armored secret key. |
| uint32_t dc_prepare_msg | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| dc_msg_t * | msg | ||
| ) |
Prepare a message for sending.
Call this function if the file to be sent is still in creation. Once you're done with creating the file, call dc_send_msg() as usual and the message will really be sent.
This is useful as the user can already send the next messages while e.g. the recoding of a video is not yet finished. Or the user can even forward the message with the file being still in creation to other groups.
Files being sent with the increation-method must be placed in the blob directory, see dc_get_blobdir(). If the increation-method is not used - which is probably the normal case - dc_send_msg() copies the file to the blob directory if it is not yet there. To distinguish the two cases, msg->state must be set properly. The easiest way to ensure this is to re-use the same object for both calls.
Example:
| context | The context object as returned from dc_context_new(). |
| chat_id | Chat ID to send the message to. |
| msg | Message object to send to the chat defined by the chat ID. On succcess, msg_id and state of the object are set up, The function does not take ownership of the object, so you have to free it using dc_msg_unref() as usual. |
| int dc_remove_contact_from_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | contact_id | ||
| ) |
Remove a member from a group.
If the group is already promoted (any message was sent to the group), all group members are informed by a special status message that is sent automatically by this function.
Sends out DC_EVENT_CHAT_MODIFIED and DC_EVENT_MSGS_CHANGED if a status message was sent.
| context | The context object. |
| chat_id | The chat ID to remove the contact from. Must be a group chat. |
| contact_id | The contact ID to remove from the chat. |
| dc_array_t * dc_search_msgs | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| const char * | query | ||
| ) |
Search messages containing the given query string.
Searching can be done globally (chat_id=0) or in a specified chat only (chat_id set).
Global chat results are typically displayed using dc_msg_get_summary(), chat search results may just hilite the corresponding messages and present a prev/next button.
For global search, result is limited to 1000 messages, this allows incremental search done fast. So, when getting exactly 1000 results, the result may be truncated; the UIs may display sth. as "1000+ messages found" in this case. Chat search (if a chat_id is set) is not limited.
| context | The context object as returned from dc_context_new(). |
| chat_id | ID of the chat to search messages in. Set this to 0 for a global search. |
| query | The query to search for. |
| void dc_send_locations_to_chat | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| int | seconds | ||
| ) |
Enable or disable location streaming for a chat.
Locations are sent to all members of the chat for the given number of seconds; after that, location streaming is automatically disabled for the chat. The current location streaming state of a chat can be checked using dc_is_sending_locations_to_chat().
The locations that should be sent to the chat can be set using dc_set_location().
| context | The context object. |
| chat_id | Chat id to enable location streaming for. |
| seconds | >0: enable location streaming for the given number of seconds; 0: disable location streaming. |
| uint32_t dc_send_msg | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| dc_msg_t * | msg | ||
| ) |
Send a message defined by a dc_msg_t object to a chat.
Sends the event DC_EVENT_MSGS_CHANGED on succcess. However, this does not imply, the message really reached the recipient - sending may be delayed e.g. due to network problems. However, from your view, you're done with the message. Sooner or later it will find its way.
Example:
If you send images with the DC_MSG_IMAGE type, they will be recoded to a reasonable size before sending, if possible (cmp the dc_set_config()-option media_quality). If that fails, is not possible, or the image is already small enough, the image is sent as original. If you want images to be always sent as the original file, use the DC_MSG_FILE type.
Videos and other file types are currently not recoded by the library, with dc_prepare_msg(), however, you can do that from the UI.
| context | The context object as returned from dc_context_new(). |
| chat_id | Chat ID to send the message to. If dc_prepare_msg() was called before, this parameter can be 0. |
| msg | Message object to send to the chat defined by the chat ID. On succcess, msg_id of the object is set up, The function does not take ownership of the object, so you have to free it using dc_msg_unref() as usual. |
| uint32_t dc_send_msg_sync | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| dc_msg_t * | msg | ||
| ) |
Send a message defined by a dc_msg_t object to a chat, synchronously.
This bypasses the IO scheduler and creates its own SMTP connection. Which means this is useful when the scheduler is not running.
| context | The context object as returned from dc_context_new(). |
| chat_id | Chat ID to send the message to. If dc_prepare_msg() was called before, this parameter can be 0. |
| msg | Message object to send to the chat defined by the chat ID. On succcess, msg_id of the object is set up, The function does not take ownership of the object, so you have to free it using dc_msg_unref() as usual. |
| uint32_t dc_send_text_msg | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| const char * | text_to_send | ||
| ) |
Send a simple text message a given chat.
Sends the event DC_EVENT_MSGS_CHANGED on succcess. However, this does not imply, the message really reached the recipient - sending may be delayed e.g. due to network problems. However, from your view, you're done with the message. Sooner or later it will find its way.
See also dc_send_msg().
| context | The context object as returned from dc_context_new(). |
| chat_id | Chat ID to send the text message to. |
| text_to_send | Text to send to the chat defined by the chat ID. Passing an empty text here causes an empty text to be sent, it's up to the caller to handle this if undesired. Passing NULL as the text causes the function to return 0. |
| uint32_t dc_send_videochat_invitation | ( | dc_context_t * | context, |
| uint32_t | chat_id | ||
| ) |
Send invitation to a videochat.
This function reads the webrtc_instance config value, may check that the server is working in some way and creates a unique room for this chat, if needed doing a TOKEN roundtrip for that.
After that, the function sends out a message that contains information to join the room:
dc_send_videochat_invitation() is blocking and may take a while, so the UIs will typically call the function from within a thread. Moreover, UIs will typically enter the room directly without an additional click on the message, for this purpose, the function returns the message id directly.
As for other messages sent, this function sends the event DC_EVENT_MSGS_CHANGED on success, the message has a delivery state, and so on. The recipient will get noticed by the call as usual by DC_EVENT_INCOMING_MSG or DC_EVENT_MSGS_CHANGED, However, UIs might some things differently, e.g. play a different sound.
| context | The context object |
| chat_id | The chat to start a videochat for. |
| int dc_set_chat_ephemeral_timer | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| uint32_t | timer | ||
| ) |
Set the chat's ephemeral message timer.
This timer is applied to all messages in a chat and starts when the message is read. For outgoing messages, the timer starts once the message is sent, for incoming messages, the timer starts once dc_markseen_msgs() is called.
The setting is synchronized to all clients participating in a chat.
| context | The context object. |
| chat_id | The chat ID to set the ephemeral message timer for. |
| timer | The timer value in seconds or 0 to disable the timer. |
| int dc_set_chat_mute_duration | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| int64_t | duration | ||
| ) |
Set mute duration of a chat.
The UI can then call dc_chat_is_muted() when receiving a new message to decide whether it should trigger an notification.
Muted chats should not sound or vibrate and should not show a visual notification in the system area. Moreover, muted chats should be excluded from global badge counter (dc_get_fresh_msgs() skips muted chats therefore) and the in-app, per-chat badge counter should use a less obtrusive color.
Sends out DC_EVENT_CHAT_MODIFIED.
| chat_id | The chat ID to set the mute duration. |
| duration | The duration (0 for no mute, -1 for forever mute, everything else is is the relative mute duration from now in seconds) |
| context | The context object. |
| int dc_set_chat_name | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| const char * | name | ||
| ) |
Set group name.
If the group is already promoted (any message was sent to the group), all group members are informed by a special status message that is sent automatically by this function.
Sends out DC_EVENT_CHAT_MODIFIED and DC_EVENT_MSGS_CHANGED if a status message was sent.
| chat_id | The chat ID to set the name for. Must be a group chat. |
| name | New name of the group. |
| context | The context object. |
| int dc_set_chat_profile_image | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| const char * | image | ||
| ) |
Set group profile image.
If the group is already promoted (any message was sent to the group), all group members are informed by a special status message that is sent automatically by this function.
Sends out DC_EVENT_CHAT_MODIFIED and DC_EVENT_MSGS_CHANGED if a status message was sent.
To find out the profile image of a chat, use dc_chat_get_profile_image()
| context | The context object. |
| chat_id | The chat ID to set the image for. |
| image | Full path of the image to use as the group image. The image will immediately be copied to the blobdir; the original image will not be needed anymore. If you pass NULL here, the group image is deleted (for promoted groups, all members are informed about this change anyway). |
| int dc_set_chat_protection | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| int | protect | ||
| ) |
Enable or disable protection against active attacks.
To enable protection, it is needed that all members are verified; if this condition is met, end-to-end-encryption is always enabled and only the verified keys are used.
Sends out DC_EVENT_CHAT_MODIFIED on changes and DC_EVENT_MSGS_CHANGED if a status message was sent.
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to change the protection for. |
| protect | 1=protect chat, 0=unprotect chat |
| void dc_set_chat_visibility | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| int | visibility | ||
| ) |
Set chat visibility to pinned, archived or normal.
Calling this function usually results in the event DC_EVENT_MSGS_CHANGED See DC_CHAT_VISIBILITY for detailed information about the visibilities.
| context | The context object as returned from dc_context_new(). |
| chat_id | The ID of the chat to change the visibility for. |
| visibility | one of DC_CHAT_VISIBILITY |
| int dc_set_config | ( | dc_context_t * | context, |
| const char * | key, | ||
| const char * | value | ||
| ) |
Configure the context.
The configuration is handled by key=value pairs as:
addr = address to display (always needed)mail_server = IMAP-server, guessed if left outmail_user = IMAP-username, guessed if left outmail_pw = IMAP-password (always needed)mail_port = IMAP-port, guessed if left outmail_security= IMAP-socket, one of DC_SOCKET, defaults to DC_SOCKET_AUTOsend_server = SMTP-server, guessed if left outsend_user = SMTP-user, guessed if left outsend_pw = SMTP-password, guessed if left outsend_port = SMTP-port, guessed if left outsend_security= SMTP-socket, one of DC_SOCKET, defaults to DC_SOCKET_AUTOserver_flags = IMAP-/SMTP-flags as a combination of DC_LP flags, guessed if left outsocks5_enabled = SOCKS5 enabledsocks5_host = SOCKS5 proxy server hostsocks5_port = SOCKS5 proxy server portsocks5_user = SOCKS5 proxy usernamesocks5_password = SOCKS5 proxy passwordimap_certificate_checks = how to check IMAP certificates, one of the DC_CERTCK flags, defaults to DC_CERTCK_AUTO (0)smtp_certificate_checks = how to check SMTP certificates, one of the DC_CERTCK flags, defaults to DC_CERTCK_AUTO (0)displayname = Own name to use when sending messages. MUAs are allowed to spread this way e.g. using CC, defaults to emptyselfstatus = Own status to display e.g. in email footers, defaults to a standard text defined by DC_STR_STATUSLINEselfavatar = File containing avatar. Will immediately be copied to the blobdir; the original image will not be needed anymore. NULL to remove the avatar. As for displayname and selfstatus, also the avatar is sent to the recipients. To save traffic, however, the avatar is attached only as needed and also recoded to a reasonable size.e2ee_enabled = 0=no end-to-end-encryption, 1=prefer end-to-end-encryption (default)mdns_enabled = 0=do not send or request read receipts, 1=send and request read receipts (default)bcc_self = 0=do not send a copy of outgoing messages to self (default), 1=send a copy of outgoing messages to self. Sending messages to self is needed for a proper multi-account setup, however, on the other hand, may lead to unwanted notifications in non-delta clients.inbox_watch = 1=watch INBOX-folder for changes (default), 0=do not watch the INBOX-folder, changes require restarting IO by calling dc_stop_io() and then dc_start_io().sentbox_watch= 1=watch Sent-folder for changes (default), 0=do not watch the Sent-folder, changes require restarting IO by calling dc_stop_io() and then dc_start_io().mvbox_watch = 1=watch DeltaChat-folder for changes (default), 0=do not watch the DeltaChat-folder, changes require restarting IO by calling dc_stop_io() and then dc_start_io().mvbox_move = 1=heuristically detect chat-messages and move them to the DeltaChat-folder, 0=do not move chat-messagesshow_emails = DC_SHOW_EMAILS_OFF (0)= show direct replies to chats only (default), DC_SHOW_EMAILS_ACCEPTED_CONTACTS (1)= also show all mails of confirmed contacts, DC_SHOW_EMAILS_ALL (2)= also show mails of unconfirmed contacts.key_gen_type = DC_KEY_GEN_DEFAULT (0)= generate recommended key type (default), DC_KEY_GEN_RSA2048 (1)= generate RSA 2048 keypair DC_KEY_GEN_ED25519 (2)= generate Ed25519 keypairsave_mime_headers = 1=save mime headers and make dc_get_mime_headers() work for subsequent calls, 0=do not save mime headers (default)delete_device_after = 0=do not delete messages from device automatically (default), >=1=seconds, after which messages are deleted automatically from the device. Messages in the "saved messages" chat (see dc_chat_is_self_talk()) are skipped. Messages are deleted whether they were seen or not, the UI should clearly point that out. See also dc_estimate_deletion_cnt().delete_server_after = 0=do not delete messages from server automatically (default), 1=delete messages directly after receiving from server, mvbox is skipped. >1=seconds, after which messages are deleted automatically from the server, mvbox is used as defined. "Saved messages" are deleted from the server as well as emails matching the show_emails settings above, the UI should clearly point that out. See also dc_estimate_deletion_cnt().media_quality = DC_MEDIA_QUALITY_BALANCED (0) = good outgoing images/videos/voice quality at reasonable sizes (default) DC_MEDIA_QUALITY_WORSE (1) allow worse images/videos/voice quality to gain smaller sizes, suitable for providers or areas known to have a bad connection. The library uses the media_quality setting to use different defaults for recoding images sent with type DC_MSG_IMAGE. If needed, recoding other file types is up to the UI.webrtc_instance = webrtc instance to use for videochats in the form [basicwebrtc:|jitsi:]https://example.com/subdir#roomname=$ROOM if the url is prefixed by basicwebrtc, the server is assumed to be of the type https://github.com/cracker0dks/basicwebrtc which some UIs have native support for. The type jitsi: may be handled by external apps. If no type is prefixed, the videochat is handled completely in a browser.bot = Set to "1" if this is a bot. Prevents adding the "Device messages" and "Saved messages" chats, adds Auto-Submitted header to outgoing messages.fetch_existing_msgs = 1=fetch most recent existing messages on configure (default), 0=do not fetch existing messages on configure. In both cases, existing recipients are added to the contact database.download_limit = Messages up to this number of bytes are downloaded automatically. For larger messages, only the header is downloaded and a placeholder is shown. These messages can be downloaded fully using dc_download_full_msg() later. The limit is compared against raw message sizes, including headers. The actually used limit may be corrected to not mess up with non-delivery-reports or read-receipts. 0=no limit (default). Changes affect future messages only.ui.* = All keys prefixed by ui. can be used by the user-interfaces for system-specific purposes. The prefix should be followed by the system and maybe subsystem, eg. ui.desktop.foo, ui.desktop.linux.bar, ui.android.foo, ui.dc40.bar, ui.bot.simplebot.baz. These keys go to backups and allow easy per-account settings when using dc_accounts_t, however, are not handled by the core otherwise.If you want to retrieve a value, use dc_get_config().
| context | The context object. |
| key | The option to change, see above. |
| value | The value to save for "key" |
| int dc_set_config_from_qr | ( | dc_context_t * | context, |
| const char * | qr | ||
| ) |
Set configuration values from a QR code.
Before this function is called, dc_check_qr() should confirm the type of the QR code is DC_QR_ACCOUNT or DC_QR_WEBRTC_INSTANCE.
Internally, the function will call dc_set_config() with the appropriate keys, e.g. addr and mail_pw for DC_QR_ACCOUNT or webrtc_instance for DC_QR_WEBRTC_INSTANCE.
| context | The context object |
| qr | scanned QR code |
| void dc_set_draft | ( | dc_context_t * | context, |
| uint32_t | chat_id, | ||
| dc_msg_t * | msg | ||
| ) |
Save a draft for a chat in the database.
The UI should call this function if the user has prepared a message and exits the compose window without clicking the "send" button before. When the user later opens the same chat again, the UI can load the draft using dc_get_draft() allowing the user to continue editing and sending.
Drafts are considered when sorting messages and are also returned e.g. by dc_chatlist_get_summary().
Each chat can have its own draft but only one draft per chat is possible.
If the draft is modified, an DC_EVENT_MSGS_CHANGED will be sent.
| context | The context object. |
| chat_id | The chat ID to save the draft for. |
| msg | The message to save as a draft. Existing draft will be overwritten. NULL deletes the existing draft, if any, without sending it. Currently, also non-text-messages will delete the existing drafts. |
| int dc_set_location | ( | dc_context_t * | context, |
| double | latitude, | ||
| double | longitude, | ||
| double | accuracy | ||
| ) |
Set current location.
The location is sent to all chats where location streaming is enabled using dc_send_locations_to_chat().
Typically results in the event DC_EVENT_LOCATION_CHANGED with contact_id set to DC_CONTACT_ID_SELF.
The UI should call this function on all location changes. The locations set by this function are not sent immediately, instead a message with the last locations is sent out every some minutes or when the user sends out a normal message, the last locations are attached.
| context | The context object. |
| latitude | North-south position of the location. Set to 0.0 if the latitude is not known. |
| longitude | East-west position of the location. Set to 0.0 if the longitude is not known. |
| accuracy | Estimated accuracy of the location, radial, in meters. Set to 0.0 if the accuracy is not known. |
| int dc_set_stock_translation | ( | dc_context_t * | context, |
| uint32_t | stock_id, | ||
| const char * | stock_msg | ||
| ) |
Set stock string translation.
The function will emit warnings if it returns an error state.
| context | The context object |
| stock_id | the integer id of the stock message, one of the DC_STR constants |
| stock_msg | the message to be used |
| void dc_start_io | ( | dc_context_t * | context | ) |
Start job and IMAP/SMTP tasks.
If IO is already running, nothing happens.
If the context was created by the dc_accounts_t account manager, use dc_accounts_start_io() instead of this function.
| context | The context object as created by dc_context_new(). |
| void dc_stop_io | ( | dc_context_t * | context | ) |
Stop job, IMAP, SMTP and other tasks and return when they are finished.
Even if IO is not running, there may be pending tasks, so this function should always be called before releasing context to ensure clean termination of event loop.
If the context was created by the dc_accounts_t account manager, use dc_accounts_stop_io() instead of this function.
| context | The context object as created by dc_context_new(). |
| void dc_stop_ongoing_process | ( | dc_context_t * | context | ) |
Signal an ongoing process to stop.
After that, dc_stop_ongoing_process() returns without waiting for the ongoing process to return.
The ongoing process will return ASAP then, however, it may still take a moment.
Typical ongoing processes are started by dc_configure(), dc_initiate_key_transfer() or dc_imex(). As there is always at most only one onging process at the same time, there is no need to define which process to exit.
| context | The context object. |
| void dc_str_unref | ( | char * | str | ) |
Release a string returned by another deltachat-core function.
| str | The string to release. If NULL is given, nothing is done. |
| int dc_was_device_msg_ever_added | ( | dc_context_t * | context, |
| const char * | label | ||
| ) |
Check if a device-message with a given label was ever added.
Device-messages can be added dc_add_device_msg().
| context | The context object. |
| label | Label of the message to check. |
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