X-Git-Url: https://git.notmuchmail.org/git?p=notmuch;a=blobdiff_plain;f=notmuch.h;h=559ac3ab5b4ca90d260f21e8f7157b678ff74592;hp=912cbd2660af90d6f636b07f2acfd3d4ed8f3757;hb=0e72d6a9ecf392ec65a23b7c81d33025eaee3e1a;hpb=84480738a5e225c145eeaac5c39bb858f6592e95 diff --git a/notmuch.h b/notmuch.h index 912cbd26..559ac3ab 100644 --- a/notmuch.h +++ b/notmuch.h @@ -31,6 +31,8 @@ NOTMUCH_BEGIN_DECLS +#include + #ifndef FALSE #define FALSE 0 #endif @@ -55,21 +57,31 @@ typedef int notmuch_bool_t; * * NOTMUCH_STATUS_XAPIAN_EXCEPTION: A Xapian exception occurred * + * NOTMUCH_STATUS_FILE_ERROR: An error occurred trying to read or + * write to a file (this could be file not found, permission + * denied, etc.) + * * NOTMUCH_STATUS_FILE_NOT_EMAIL: A file was presented that doesn't - * appear to be an email message. + * appear to be an email message. + * + * NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID: A file contains a message ID + * that is identical to a message already in the database. * * NOTMUCH_STATUS_NULL_POINTER: The user erroneously passed a NULL - * pointer to a notmuch function. + * pointer to a notmuch function. * - * NOTMUCH_STATUS_TAG_TOO_LONG: A tag value is too long. + * NOTMUCH_STATUS_TAG_TOO_LONG: A tag value is too long (exceeds + * NOTMUCH_TAG_MAX) * * NOTMUCH_STATUS_LAST_STATUS: Not an actual status value. Just a way - * to find out how many valid status values there are. + * to find out how many valid status values there are. */ typedef enum _notmuch_status { NOTMUCH_STATUS_SUCCESS = 0, NOTMUCH_STATUS_XAPIAN_EXCEPTION, + NOTMUCH_STATUS_FILE_ERROR, NOTMUCH_STATUS_FILE_NOT_EMAIL, + NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID, NOTMUCH_STATUS_NULL_POINTER, NOTMUCH_STATUS_TAG_TOO_LONG, @@ -92,6 +104,19 @@ typedef struct _notmuch_message notmuch_message_t; typedef struct _notmuch_tags notmuch_tags_t; typedef struct _notmuch_thread_ids notmuch_thread_ids_t; +/* Lookup the default database path. + * + * This is the path that will be used by notmuch_database_create and + * notmuch_database_open if given a NULL path. Specifically it will be + * the value of the NOTMUCH_BASE environment variable if set, + * otherwise ${HOME}/mail + * + * Returns a newly allocated string which the caller should free() + * when finished with it. + */ +char * +notmuch_database_default_path (void); + /* Create a new, empty notmuch database located at 'path'. * * The path should be a top-level directory to a collection of @@ -119,6 +144,9 @@ typedef struct _notmuch_thread_ids notmuch_thread_ids_t; notmuch_database_t * notmuch_database_create (const char *path); +/* XXX: I think I'd like this to take an extra argument of + * notmuch_status_t* for returning a status value on failure. */ + /* Open a an existing notmuch database located at 'path'. * * The database should have been created at some time in the past, @@ -147,19 +175,6 @@ notmuch_database_open (const char *path); void notmuch_database_close (notmuch_database_t *database); -/* Lookup the default database path. - * - * This is the path that will be used by notmuch_database_create and - * notmuch_database_open if given a NULL path. Specifically it will be - * the value of the NOTMUCH_BASE environment variable if set, - * otherwise ${HOME}/mail - * - * Returns a newly allocated string which the caller should free() - * when finished with it. - */ -char * -notmuch_database_default_path (void); - /* Return the database path of the given database. * * The return value is a string owned by notmuch so should not be @@ -167,6 +182,57 @@ notmuch_database_default_path (void); const char * notmuch_database_get_path (notmuch_database_t *database); +/* Store a timestamp within the database. + * + * The Notmuch database will not interpret this key nor the timestamp + * values at all. It will merely store them together and return the + * timestamp when notmuch_database_get_timestamp is called with the + * same value for 'key'. + * + * The intention is for the caller to use the timestamp to allow + * efficient identification of new messages to be added to the + * database. The recommended usage is as follows: + * + * o Read the mtime of a directory from the filesystem + * + * o Call add_message for all mail files in the directory + * + * o Call notmuch_database_set_timestamp with the path of the + * directory as 'key' and the originally read mtime as 'value'. + * + * Then, when wanting to check for updates to the directory in the + * future, the client can call notmuch_database_get_timestamp and know + * that it only needs to add files if the mtime of the directory and + * files are newer than the stored timestamp. + * + * Note: The notmuch_database_get_timestamp function does not allow + * the caller to distinguish a timestamp of 0 from a non-existent + * timestamp. So don't store a timestamp of 0 unless you are + * comfortable with that. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: Timestamp successfully stored in database. + * + * NOTMUCH_STATUS_XAPIAN_EXCEPTION: A Xapian exception + * occurred. Timestamp not stored. + */ +notmuch_status_t +notmuch_database_set_timestamp (notmuch_database_t *database, + const char *key, time_t timestamp); + +/* Retrieve a timestamp from the database. + * + * Returns the timestamp value previously stored by calling + * notmuch_database_set_timestamp with the same value for 'key'. + * + * Returns 0 if no timestamp is stored for 'key' or if any error + * occurred querying the database. + */ +time_t +notmuch_database_get_timestamp (notmuch_database_t *database, + const char *key); + /* Add a new message to the given notmuch database. * * Here,'filename' should be a path relative to the the path of @@ -180,8 +246,16 @@ notmuch_database_get_path (notmuch_database_t *database); * * NOTMUCH_STATUS_SUCCESS: Message successfully added to database. * + * NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID: Message has the same message + * ID as another message already in the database. Nothing added + * to the database. + * + * NOTMUCH_STATUS_FILE_ERROR: an error occurred trying to open the + * file, (such as permission denied, or file not found, + * etc.). Nothing added to the database. + * * NOTMUCH_STATUS_FILE_NOT_EMAIL: the contents of filename don't look - * like an email message. Nothing added to the database. + * like an email message. Nothing added to the database. */ notmuch_status_t notmuch_database_add_message (notmuch_database_t *database, @@ -329,10 +403,24 @@ notmuch_results_destroy (notmuch_results_t *results); * modified by the caller and will only be valid for as long as the * message is valid, (which is until the query from which it derived * is destroyed). + * + * This function will not return NULL since Notmuch ensures that every + * message has a unique message ID, (Notmuch will generate an ID for a + * message if the original file does not contain one). */ const char * notmuch_message_get_message_id (notmuch_message_t *message); +/* Get the filename for the email corresponding to 'message'. + * + * The returned filename is relative to the base of the database from + * which 'message' was obtained. See notmuch_database_get_path() . + * The returned string belongs to the message so should not be + * modified or freed by the caller (nor should it be referenced after + * the message is destroyed). */ +const char * +notmuch_message_get_filename (notmuch_message_t *message); + /* Get the tags for 'message', returning a notmuch_tags_t object which * can be used to iterate over all tags. * @@ -411,7 +499,7 @@ notmuch_message_get_thread_ids (notmuch_message_t *message); * NOTMUCH_STATUS_NULL_POINTER: The 'tag' argument is NULL * * NOTMUCH_STATUS_TAG_TOO_LONG: The length of 'tag' is longer than - * too long (exceeds NOTMUCH_TAG_MAX) + * too long (exceeds NOTMUCH_TAG_MAX) */ notmuch_status_t notmuch_message_add_tag (notmuch_message_t *message, const char *tag); @@ -425,7 +513,7 @@ notmuch_message_add_tag (notmuch_message_t *message, const char *tag); * NOTMUCH_STATUS_NULL_POINTER: The 'tag' argument is NULL * * NOTMUCH_STATUS_TAG_TOO_LONG: The length of 'tag' is longer than - * too long (exceeds NOTMUCH_TAG_MAX) + * too long (exceeds NOTMUCH_TAG_MAX) */ notmuch_status_t notmuch_message_remove_tag (notmuch_message_t *message, const char *tag);