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Diffstat (limited to 'bindings/go/src/notmuch/notmuch.go')
| -rw-r--r-- | bindings/go/src/notmuch/notmuch.go | 1131 |
1 files changed, 1131 insertions, 0 deletions
diff --git a/bindings/go/src/notmuch/notmuch.go b/bindings/go/src/notmuch/notmuch.go new file mode 100644 index 0000000..00bd53a --- /dev/null +++ b/bindings/go/src/notmuch/notmuch.go @@ -0,0 +1,1131 @@ +// Wrapper around the notmuch library + +package notmuch + +/* +#cgo LDFLAGS: -lnotmuch + +#include <stdlib.h> +#include <string.h> +#include <time.h> +#include "notmuch.h" +*/ +import "C" +import "unsafe" + +// Status codes used for the return values of most functions +type Status C.notmuch_status_t + +const ( + STATUS_SUCCESS Status = iota + STATUS_OUT_OF_MEMORY + STATUS_READ_ONLY_DATABASE + STATUS_XAPIAN_EXCEPTION + STATUS_FILE_ERROR + STATUS_FILE_NOT_EMAIL + STATUS_DUPLICATE_MESSAGE_ID + STATUS_NULL_POINTER + STATUS_TAG_TOO_LONG + STATUS_UNBALANCED_FREEZE_THAW + STATUS_UNBALANCED_ATOMIC + + STATUS_LAST_STATUS +) + +func (self Status) String() string { + var p *C.char + + // p is read-only + p = C.notmuch_status_to_string(C.notmuch_status_t(self)) + if p != nil { + s := C.GoString(p) + return s + } + return "" +} + +/* Various opaque data types. For each notmuch_<foo>_t see the various + * notmuch_<foo> functions below. */ + +type Database struct { + db *C.notmuch_database_t +} + +type Query struct { + query *C.notmuch_query_t +} + +type Threads struct { + threads *C.notmuch_threads_t +} + +type Thread struct { + thread *C.notmuch_thread_t +} + +type Messages struct { + messages *C.notmuch_messages_t +} + +type Message struct { + message *C.notmuch_message_t +} + +type Tags struct { + tags *C.notmuch_tags_t +} + +type Directory struct { + dir *C.notmuch_directory_t +} + +type Filenames struct { + fnames *C.notmuch_filenames_t +} + +type DatabaseMode C.notmuch_database_mode_t + +const ( + DATABASE_MODE_READ_ONLY DatabaseMode = 0 + DATABASE_MODE_READ_WRITE +) + +// Create a new, empty notmuch database located at 'path' +func NewDatabase(path string) (*Database, Status) { + + var c_path *C.char = C.CString(path) + defer C.free(unsafe.Pointer(c_path)) + + if c_path == nil { + return nil, STATUS_OUT_OF_MEMORY + } + + self := &Database{db: nil} + st := Status(C.notmuch_database_create(c_path, &self.db)) + if st != STATUS_SUCCESS { + return nil, st + } + return self, st +} + +/* Open an existing notmuch database located at 'path'. + * + * The database should have been created at some time in the past, + * (not necessarily by this process), by calling + * notmuch_database_create with 'path'. By default the database should be + * opened for reading only. In order to write to the database you need to + * pass the NOTMUCH_DATABASE_MODE_READ_WRITE mode. + * + * An existing notmuch database can be identified by the presence of a + * directory named ".notmuch" below 'path'. + * + * The caller should call notmuch_database_destroy when finished with + * this database. + * + * In case of any failure, this function returns NULL, (after printing + * an error message on stderr). + */ +func OpenDatabase(path string, mode DatabaseMode) (*Database, Status) { + + var c_path *C.char = C.CString(path) + defer C.free(unsafe.Pointer(c_path)) + + if c_path == nil { + return nil, STATUS_OUT_OF_MEMORY + } + + self := &Database{db: nil} + st := Status(C.notmuch_database_open(c_path, C.notmuch_database_mode_t(mode), &self.db)) + if st != STATUS_SUCCESS { + return nil, st + } + return self, st +} + +/* Close the given notmuch database, freeing all associated + * resources. See notmuch_database_open. */ +func (self *Database) Close() { + C.notmuch_database_destroy(self.db) +} + +/* Return the database path of the given database. + */ +func (self *Database) GetPath() string { + + /* The return value is a string owned by notmuch so should not be + * modified nor freed by the caller. */ + var p *C.char = C.notmuch_database_get_path(self.db) + if p != nil { + s := C.GoString(p) + return s + } + return "" +} + +/* Return the database format version of the given database. */ +func (self *Database) GetVersion() uint { + return uint(C.notmuch_database_get_version(self.db)) +} + +/* Does this database need to be upgraded before writing to it? + * + * If this function returns TRUE then no functions that modify the + * database (notmuch_database_add_message, notmuch_message_add_tag, + * notmuch_directory_set_mtime, etc.) will work unless the function + * notmuch_database_upgrade is called successfully first. */ +func (self *Database) NeedsUpgrade() bool { + do_upgrade := C.notmuch_database_needs_upgrade(self.db) + if do_upgrade == 0 { + return false + } + return true +} + +// TODO: notmuch_database_upgrade + +/* Retrieve a directory object from the database for 'path'. + * + * Here, 'path' should be a path relative to the path of 'database' + * (see notmuch_database_get_path), or else should be an absolute path + * with initial components that match the path of 'database'. + * + * Can return NULL if a Xapian exception occurs. + */ +func (self *Database) GetDirectory(path string) (*Directory, Status) { + var c_path *C.char = C.CString(path) + defer C.free(unsafe.Pointer(c_path)) + + if c_path == nil { + return nil, STATUS_OUT_OF_MEMORY + } + + var c_dir *C.notmuch_directory_t + st := Status(C.notmuch_database_get_directory(self.db, c_path, &c_dir)) + if st != STATUS_SUCCESS || c_dir == nil { + return nil, st + } + return &Directory{dir: c_dir}, st +} + +/* Add a new message to the given notmuch database. + * + * Here,'filename' should be a path relative to the path of + * 'database' (see notmuch_database_get_path), or else should be an + * absolute filename with initial components that match the path of + * 'database'. + * + * The file should be a single mail message (not a multi-message mbox) + * that is expected to remain at its current location, (since the + * notmuch database will reference the filename, and will not copy the + * entire contents of the file. + * + * If 'message' is not NULL, then, on successful return '*message' + * will be initialized to a message object that can be used for things + * such as adding tags to the just-added message. The user should call + * notmuch_message_destroy when done with the message. On any failure + * '*message' will be set to NULL. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: Message successfully added to database. + * + * NOTMUCH_STATUS_XAPIAN_EXCEPTION: A Xapian exception occurred, + * message not added. + * + * NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID: Message has the same message + * ID as another message already in the database. The new + * filename was successfully added to the message in the database + * (if not already present). + * + * 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. + * + * NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only + * mode so no message can be added. + */ +func (self *Database) AddMessage(fname string) (*Message, Status) { + var c_fname *C.char = C.CString(fname) + defer C.free(unsafe.Pointer(c_fname)) + + if c_fname == nil { + return nil, STATUS_OUT_OF_MEMORY + } + + var c_msg *C.notmuch_message_t = new(C.notmuch_message_t) + st := Status(C.notmuch_database_add_message(self.db, c_fname, &c_msg)) + + return &Message{message: c_msg}, st +} + +/* Remove a message from the given notmuch database. + * + * Note that only this particular filename association is removed from + * the database. If the same message (as determined by the message ID) + * is still available via other filenames, then the message will + * persist in the database for those filenames. When the last filename + * is removed for a particular message, the database content for that + * message will be entirely removed. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: The last filename was removed and the + * message was removed from the database. + * + * NOTMUCH_STATUS_XAPIAN_EXCEPTION: A Xapian exception occurred, + * message not removed. + * + * NOTMUCH_STATUS_DUPLICATE_MESSAGE_ID: This filename was removed but + * the message persists in the database with at least one other + * filename. + * + * NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only + * mode so no message can be removed. + */ +func (self *Database) RemoveMessage(fname string) Status { + + var c_fname *C.char = C.CString(fname) + defer C.free(unsafe.Pointer(c_fname)) + + if c_fname == nil { + return STATUS_OUT_OF_MEMORY + } + + st := C.notmuch_database_remove_message(self.db, c_fname) + return Status(st) +} + +/* Find a message with the given message_id. + * + * If the database contains a message with the given message_id, then + * a new notmuch_message_t object is returned. The caller should call + * notmuch_message_destroy when done with the message. + * + * This function returns NULL in the following situations: + * + * * No message is found with the given message_id + * * An out-of-memory situation occurs + * * A Xapian exception occurs + */ +func (self *Database) FindMessage(message_id string) (*Message, Status) { + + var c_msg_id *C.char = C.CString(message_id) + defer C.free(unsafe.Pointer(c_msg_id)) + + if c_msg_id == nil { + return nil, STATUS_OUT_OF_MEMORY + } + + msg := &Message{message: nil} + st := Status(C.notmuch_database_find_message(self.db, c_msg_id, &msg.message)) + if st != STATUS_SUCCESS { + return nil, st + } + return msg, st +} + +/* Return a list of all tags found in the database. + * + * This function creates a list of all tags found in the database. The + * resulting list contains all tags from all messages found in the database. + * + * On error this function returns NULL. + */ +func (self *Database) GetAllTags() *Tags { + tags := C.notmuch_database_get_all_tags(self.db) + if tags == nil { + return nil + } + return &Tags{tags: tags} +} + +/* Create a new query for 'database'. + * + * Here, 'database' should be an open database, (see + * notmuch_database_open and notmuch_database_create). + * + * For the query string, we'll document the syntax here more + * completely in the future, but it's likely to be a specialized + * version of the general Xapian query syntax: + * + * http://xapian.org/docs/queryparser.html + * + * As a special case, passing either a length-zero string, (that is ""), + * or a string consisting of a single asterisk (that is "*"), will + * result in a query that returns all messages in the database. + * + * See notmuch_query_set_sort for controlling the order of results. + * See notmuch_query_search_messages and notmuch_query_search_threads + * to actually execute the query. + * + * User should call notmuch_query_destroy when finished with this + * query. + * + * Will return NULL if insufficient memory is available. + */ +func (self *Database) CreateQuery(query string) *Query { + + var c_query *C.char = C.CString(query) + defer C.free(unsafe.Pointer(c_query)) + + if c_query == nil { + return nil + } + + q := C.notmuch_query_create(self.db, c_query) + if q == nil { + return nil + } + return &Query{query: q} +} + +/* Sort values for notmuch_query_set_sort */ +type Sort C.notmuch_sort_t + +const ( + SORT_OLDEST_FIRST Sort = 0 + SORT_NEWEST_FIRST + SORT_MESSAGE_ID + SORT_UNSORTED +) + +/* Return the query_string of this query. See notmuch_query_create. */ +func (self *Query) String() string { + // FIXME: do we own 'q' or not ? + q := C.notmuch_query_get_query_string(self.query) + //defer C.free(unsafe.Pointer(q)) + + if q != nil { + s := C.GoString(q) + return s + } + + return "" +} + +/* Specify the sorting desired for this query. */ +func (self *Query) SetSort(sort Sort) { + C.notmuch_query_set_sort(self.query, C.notmuch_sort_t(sort)) +} + +/* Return the sort specified for this query. See notmuch_query_set_sort. */ +func (self *Query) GetSort() Sort { + return Sort(C.notmuch_query_get_sort(self.query)) +} + +/* Execute a query for threads, returning a notmuch_threads_t object + * which can be used to iterate over the results. The returned threads + * object is owned by the query and as such, will only be valid until + * notmuch_query_destroy. + * + * Typical usage might be: + * + * notmuch_query_t *query; + * notmuch_threads_t *threads; + * notmuch_thread_t *thread; + * + * query = notmuch_query_create (database, query_string); + * + * for (threads = notmuch_query_search_threads (query); + * notmuch_threads_valid (threads); + * notmuch_threads_move_to_next (threads)) + * { + * thread = notmuch_threads_get (threads); + * .... + * notmuch_thread_destroy (thread); + * } + * + * notmuch_query_destroy (query); + * + * Note: If you are finished with a thread before its containing + * query, you can call notmuch_thread_destroy to clean up some memory + * sooner (as in the above example). Otherwise, if your thread objects + * are long-lived, then you don't need to call notmuch_thread_destroy + * and all the memory will still be reclaimed when the query is + * destroyed. + * + * Note that there's no explicit destructor needed for the + * notmuch_threads_t object. (For consistency, we do provide a + * notmuch_threads_destroy function, but there's no good reason + * to call it if the query is about to be destroyed). + * + * If a Xapian exception occurs this function will return NULL. + */ +func (self *Query) SearchThreads() *Threads { + threads := C.notmuch_query_search_threads(self.query) + if threads == nil { + return nil + } + return &Threads{threads: threads} +} + +/* Execute a query for messages, returning a notmuch_messages_t object + * which can be used to iterate over the results. The returned + * messages object is owned by the query and as such, will only be + * valid until notmuch_query_destroy. + * + * Typical usage might be: + * + * notmuch_query_t *query; + * notmuch_messages_t *messages; + * notmuch_message_t *message; + * + * query = notmuch_query_create (database, query_string); + * + * for (messages = notmuch_query_search_messages (query); + * notmuch_messages_valid (messages); + * notmuch_messages_move_to_next (messages)) + * { + * message = notmuch_messages_get (messages); + * .... + * notmuch_message_destroy (message); + * } + * + * notmuch_query_destroy (query); + * + * Note: If you are finished with a message before its containing + * query, you can call notmuch_message_destroy to clean up some memory + * sooner (as in the above example). Otherwise, if your message + * objects are long-lived, then you don't need to call + * notmuch_message_destroy and all the memory will still be reclaimed + * when the query is destroyed. + * + * Note that there's no explicit destructor needed for the + * notmuch_messages_t object. (For consistency, we do provide a + * notmuch_messages_destroy function, but there's no good + * reason to call it if the query is about to be destroyed). + * + * If a Xapian exception occurs this function will return NULL. + */ +func (self *Query) SearchMessages() *Messages { + msgs := C.notmuch_query_search_messages(self.query) + if msgs == nil { + return nil + } + return &Messages{messages: msgs} +} + +/* Destroy a notmuch_query_t along with any associated resources. + * + * This will in turn destroy any notmuch_threads_t and + * notmuch_messages_t objects generated by this query, (and in + * turn any notmuch_thread_t and notmuch_message_t objects generated + * from those results, etc.), if such objects haven't already been + * destroyed. + */ +func (self *Query) Destroy() { + if self.query != nil { + C.notmuch_query_destroy(self.query) + } +} + +/* Return an estimate of the number of messages matching a search + * + * This function performs a search and returns Xapian's best + * guess as to number of matching messages. + * + * If a Xapian exception occurs, this function may return 0 (after + * printing a message). + */ +func (self *Query) CountMessages() uint { + return uint(C.notmuch_query_count_messages(self.query)) +} + +// TODO: wrap threads and thread + +/* Is the given 'threads' iterator pointing at a valid thread. + * + * When this function returns TRUE, notmuch_threads_get will return a + * valid object. Whereas when this function returns FALSE, + * notmuch_threads_get will return NULL. + * + * See the documentation of notmuch_query_search_threads for example + * code showing how to iterate over a notmuch_threads_t object. + */ +func (self *Threads) Valid() bool { + if self.threads == nil { + return false + } + valid := C.notmuch_threads_valid(self.threads) + if valid == 0 { + return false + } + return true +} + +/* Destroy a notmuch_threads_t object. + * + * It's not strictly necessary to call this function. All memory from + * the notmuch_threads_t object will be reclaimed when the + * containg query object is destroyed. + */ +func (self *Threads) Destroy() { + if self.threads != nil { + C.notmuch_threads_destroy(self.threads) + } +} + +/* Is the given 'messages' iterator pointing at a valid message. + * + * When this function returns TRUE, notmuch_messages_get will return a + * valid object. Whereas when this function returns FALSE, + * notmuch_messages_get will return NULL. + * + * See the documentation of notmuch_query_search_messages for example + * code showing how to iterate over a notmuch_messages_t object. + */ +func (self *Messages) Valid() bool { + if self.messages == nil { + return false + } + valid := C.notmuch_messages_valid(self.messages) + if valid == 0 { + return false + } + return true +} + +/* Get the current message from 'messages' as a notmuch_message_t. + * + * Note: The returned message belongs to 'messages' and has a lifetime + * identical to it (and the query to which it belongs). + * + * See the documentation of notmuch_query_search_messages for example + * code showing how to iterate over a notmuch_messages_t object. + * + * If an out-of-memory situation occurs, this function will return + * NULL. + */ +func (self *Messages) Get() *Message { + if self.messages == nil { + return nil + } + msg := C.notmuch_messages_get(self.messages) + if msg == nil { + return nil + } + return &Message{message: msg} +} + +/* Move the 'messages' iterator to the next message. + * + * If 'messages' is already pointing at the last message then the + * iterator will be moved to a point just beyond that last message, + * (where notmuch_messages_valid will return FALSE and + * notmuch_messages_get will return NULL). + * + * See the documentation of notmuch_query_search_messages for example + * code showing how to iterate over a notmuch_messages_t object. + */ +func (self *Messages) MoveToNext() { + if self.messages == nil { + return + } + C.notmuch_messages_move_to_next(self.messages) +} + +/* Destroy a notmuch_messages_t object. + * + * It's not strictly necessary to call this function. All memory from + * the notmuch_messages_t object will be reclaimed when the containing + * query object is destroyed. + */ +func (self *Messages) Destroy() { + if self.messages != nil { + C.notmuch_messages_destroy(self.messages) + } +} + +/* Return a list of tags from all messages. + * + * The resulting list is guaranteed not to contain duplicated tags. + * + * WARNING: You can no longer iterate over messages after calling this + * function, because the iterator will point at the end of the list. + * We do not have a function to reset the iterator yet and the only + * way how you can iterate over the list again is to recreate the + * message list. + * + * The function returns NULL on error. + */ +func (self *Messages) CollectTags() *Tags { + if self.messages == nil { + return nil + } + tags := C.notmuch_messages_collect_tags(self.messages) + if tags == nil { + return nil + } + return &Tags{tags: tags} +} + +/* Get the message ID of 'message'. + * + * The returned string belongs to 'message' and as such, should not be + * 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). + */ +func (self *Message) GetMessageId() string { + + if self.message == nil { + return "" + } + id := C.notmuch_message_get_message_id(self.message) + // we dont own id + // defer C.free(unsafe.Pointer(id)) + if id == nil { + return "" + } + return C.GoString(id) +} + +/* Get the thread ID of 'message'. + * + * The returned string belongs to 'message' and as such, should not be + * modified by the caller and will only be valid for as long as the + * message is valid, (for example, until the user calls + * notmuch_message_destroy on 'message' or until a query from which it + * derived is destroyed). + * + * This function will not return NULL since Notmuch ensures that every + * message belongs to a single thread. + */ +func (self *Message) GetThreadId() string { + + if self.message == nil { + return "" + } + id := C.notmuch_message_get_thread_id(self.message) + // we dont own id + // defer C.free(unsafe.Pointer(id)) + + if id == nil { + return "" + } + + return C.GoString(id) +} + +/* Get a notmuch_messages_t iterator for all of the replies to + * 'message'. + * + * Note: This call only makes sense if 'message' was ultimately + * obtained from a notmuch_thread_t object, (such as by coming + * directly from the result of calling notmuch_thread_get_ + * toplevel_messages or by any number of subsequent + * calls to notmuch_message_get_replies). + * + * If 'message' was obtained through some non-thread means, (such as + * by a call to notmuch_query_search_messages), then this function + * will return NULL. + * + * If there are no replies to 'message', this function will return + * NULL. (Note that notmuch_messages_valid will accept that NULL + * value as legitimate, and simply return FALSE for it.) + */ +func (self *Message) GetReplies() *Messages { + if self.message == nil { + return nil + } + msgs := C.notmuch_message_get_replies(self.message) + if msgs == nil { + return nil + } + return &Messages{messages: msgs} +} + +/* Get a filename for the email corresponding to 'message'. + * + * The returned filename is an absolute filename, (the initial + * component will match 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). + * + * Note: If this message corresponds to multiple files in the mail + * store, (that is, multiple files contain identical message IDs), + * this function will arbitrarily return a single one of those + * filenames. + */ +func (self *Message) GetFileName() string { + if self.message == nil { + return "" + } + fname := C.notmuch_message_get_filename(self.message) + // we dont own fname + // defer C.free(unsafe.Pointer(fname)) + + if fname == nil { + return "" + } + + return C.GoString(fname) +} + +type Flag C.notmuch_message_flag_t + +const ( + MESSAGE_FLAG_MATCH Flag = 0 +) + +/* Get a value of a flag for the email corresponding to 'message'. */ +func (self *Message) GetFlag(flag Flag) bool { + if self.message == nil { + return false + } + v := C.notmuch_message_get_flag(self.message, C.notmuch_message_flag_t(flag)) + if v == 0 { + return false + } + return true +} + +/* Set a value of a flag for the email corresponding to 'message'. */ +func (self *Message) SetFlag(flag Flag, value bool) { + if self.message == nil { + return + } + var v C.notmuch_bool_t = 0 + if value { + v = 1 + } + C.notmuch_message_set_flag(self.message, C.notmuch_message_flag_t(flag), v) +} + +// TODO: wrap notmuch_message_get_date + +/* Get the value of the specified header from 'message'. + * + * The value will be read from the actual message file, not from the + * notmuch database. The header name is case insensitive. + * + * 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). + * + * Returns an empty string ("") if the message does not contain a + * header line matching 'header'. Returns NULL if any error occurs. + */ +func (self *Message) GetHeader(header string) string { + if self.message == nil { + return "" + } + + var c_header *C.char = C.CString(header) + defer C.free(unsafe.Pointer(c_header)) + + /* we dont own value */ + value := C.notmuch_message_get_header(self.message, c_header) + if value == nil { + return "" + } + + return C.GoString(value) +} + +/* Get the tags for 'message', returning a notmuch_tags_t object which + * can be used to iterate over all tags. + * + * The tags object is owned by the message and as such, will only be + * valid for as long as the message is valid, (which is until the + * query from which it derived is destroyed). + * + * Typical usage might be: + * + * notmuch_message_t *message; + * notmuch_tags_t *tags; + * const char *tag; + * + * message = notmuch_database_find_message (database, message_id); + * + * for (tags = notmuch_message_get_tags (message); + * notmuch_tags_valid (tags); + * notmuch_result_move_to_next (tags)) + * { + * tag = notmuch_tags_get (tags); + * .... + * } + * + * notmuch_message_destroy (message); + * + * Note that there's no explicit destructor needed for the + * notmuch_tags_t object. (For consistency, we do provide a + * notmuch_tags_destroy function, but there's no good reason to call + * it if the message is about to be destroyed). + */ +func (self *Message) GetTags() *Tags { + if self.message == nil { + return nil + } + tags := C.notmuch_message_get_tags(self.message) + if tags == nil { + return nil + } + return &Tags{tags: tags} +} + +/* The longest possible tag value. */ +const TAG_MAX = 200 + +/* Add a tag to the given message. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: Tag successfully added to message + * + * NOTMUCH_STATUS_NULL_POINTER: The 'tag' argument is NULL + * + * NOTMUCH_STATUS_TAG_TOO_LONG: The length of 'tag' is too long + * (exceeds NOTMUCH_TAG_MAX) + * + * NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only + * mode so message cannot be modified. + */ +func (self *Message) AddTag(tag string) Status { + if self.message == nil { + return STATUS_NULL_POINTER + } + c_tag := C.CString(tag) + defer C.free(unsafe.Pointer(c_tag)) + + return Status(C.notmuch_message_add_tag(self.message, c_tag)) +} + +/* Remove a tag from the given message. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: Tag successfully removed from message + * + * NOTMUCH_STATUS_NULL_POINTER: The 'tag' argument is NULL + * + * NOTMUCH_STATUS_TAG_TOO_LONG: The length of 'tag' is too long + * (exceeds NOTMUCH_TAG_MAX) + * + * NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only + * mode so message cannot be modified. + */ +func (self *Message) RemoveTag(tag string) Status { + if self.message == nil { + return STATUS_NULL_POINTER + } + c_tag := C.CString(tag) + defer C.free(unsafe.Pointer(c_tag)) + + return Status(C.notmuch_message_remove_tag(self.message, c_tag)) +} + +/* Remove all tags from the given message. + * + * See notmuch_message_freeze for an example showing how to safely + * replace tag values. + * + * NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only + * mode so message cannot be modified. + */ +func (self *Message) RemoveAllTags() Status { + if self.message == nil { + return STATUS_NULL_POINTER + } + return Status(C.notmuch_message_remove_all_tags(self.message)) +} + +/* Freeze the current state of 'message' within the database. + * + * This means that changes to the message state, (via + * notmuch_message_add_tag, notmuch_message_remove_tag, and + * notmuch_message_remove_all_tags), will not be committed to the + * database until the message is thawed with notmuch_message_thaw. + * + * Multiple calls to freeze/thaw are valid and these calls will + * "stack". That is there must be as many calls to thaw as to freeze + * before a message is actually thawed. + * + * The ability to do freeze/thaw allows for safe transactions to + * change tag values. For example, explicitly setting a message to + * have a given set of tags might look like this: + * + * notmuch_message_freeze (message); + * + * notmuch_message_remove_all_tags (message); + * + * for (i = 0; i < NUM_TAGS; i++) + * notmuch_message_add_tag (message, tags[i]); + * + * notmuch_message_thaw (message); + * + * With freeze/thaw used like this, the message in the database is + * guaranteed to have either the full set of original tag values, or + * the full set of new tag values, but nothing in between. + * + * Imagine the example above without freeze/thaw and the operation + * somehow getting interrupted. This could result in the message being + * left with no tags if the interruption happened after + * notmuch_message_remove_all_tags but before notmuch_message_add_tag. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: Message successfully frozen. + * + * NOTMUCH_STATUS_READ_ONLY_DATABASE: Database was opened in read-only + * mode so message cannot be modified. + */ +func (self *Message) Freeze() Status { + if self.message == nil { + return STATUS_NULL_POINTER + } + return Status(C.notmuch_message_freeze(self.message)) +} + +/* Thaw the current 'message', synchronizing any changes that may have + * occurred while 'message' was frozen into the notmuch database. + * + * See notmuch_message_freeze for an example of how to use this + * function to safely provide tag changes. + * + * Multiple calls to freeze/thaw are valid and these calls with + * "stack". That is there must be as many calls to thaw as to freeze + * before a message is actually thawed. + * + * Return value: + * + * NOTMUCH_STATUS_SUCCESS: Message successfully thawed, (or at least + * its frozen count has successfully been reduced by 1). + * + * NOTMUCH_STATUS_UNBALANCED_FREEZE_THAW: An attempt was made to thaw + * an unfrozen message. That is, there have been an unbalanced + * number of calls to notmuch_message_freeze and + * notmuch_message_thaw. + */ +func (self *Message) Thaw() Status { + if self.message == nil { + return STATUS_NULL_POINTER + } + + return Status(C.notmuch_message_thaw(self.message)) +} + +/* Destroy a notmuch_message_t object. + * + * It can be useful to call this function in the case of a single + * query object with many messages in the result, (such as iterating + * over the entire database). Otherwise, it's fine to never call this + * function and there will still be no memory leaks. (The memory from + * the messages get reclaimed when the containing query is destroyed.) + */ +func (self *Message) Destroy() { + if self.message == nil { + return + } + C.notmuch_message_destroy(self.message) +} + +/* Is the given 'tags' iterator pointing at a valid tag. + * + * When this function returns TRUE, notmuch_tags_get will return a + * valid string. Whereas when this function returns FALSE, + * notmuch_tags_get will return NULL. + * + * See the documentation of notmuch_message_get_tags for example code + * showing how to iterate over a notmuch_tags_t object. + */ +func (self *Tags) Valid() bool { + if self.tags == nil { + return false + } + v := C.notmuch_tags_valid(self.tags) + if v == 0 { + return false + } + return true +} + +/* Get the current tag from 'tags' as a string. + * + * Note: The returned string belongs to 'tags' and has a lifetime + * identical to it (and the query to which it ultimately belongs). + * + * See the documentation of notmuch_message_get_tags for example code + * showing how to iterate over a notmuch_tags_t object. + */ +func (self *Tags) Get() string { + if self.tags == nil { + return "" + } + s := C.notmuch_tags_get(self.tags) + // we dont own 's' + + return C.GoString(s) +} +func (self *Tags) String() string { + return self.Get() +} + +/* Move the 'tags' iterator to the next tag. + * + * If 'tags' is already pointing at the last tag then the iterator + * will be moved to a point just beyond that last tag, (where + * notmuch_tags_valid will return FALSE and notmuch_tags_get will + * return NULL). + * + * See the documentation of notmuch_message_get_tags for example code + * showing how to iterate over a notmuch_tags_t object. + */ +func (self *Tags) MoveToNext() { + if self.tags == nil { + return + } + C.notmuch_tags_move_to_next(self.tags) +} + +/* Destroy a notmuch_tags_t object. + * + * It's not strictly necessary to call this function. All memory from + * the notmuch_tags_t object will be reclaimed when the containing + * message or query objects are destroyed. + */ +func (self *Tags) Destroy() { + if self.tags == nil { + return + } + C.notmuch_tags_destroy(self.tags) +} + +// TODO: wrap notmuch_directory_<fct> + +/* Destroy a notmuch_directory_t object. */ +func (self *Directory) Destroy() { + if self.dir == nil { + return + } + C.notmuch_directory_destroy(self.dir) +} + +// TODO: wrap notmuch_filenames_<fct> + +/* Destroy a notmuch_filenames_t object. + * + * It's not strictly necessary to call this function. All memory from + * the notmuch_filenames_t object will be reclaimed when the + * containing directory object is destroyed. + * + * It is acceptable to pass NULL for 'filenames', in which case this + * function will do nothing. + */ +func (self *Filenames) Destroy() { + if self.fnames == nil { + return + } + C.notmuch_filenames_destroy(self.fnames) +} + +/* EOF */ |