[PATCH 7/7] go: Bind notmuch_thread_t functions

[Adrien Bustany]

---
 bindings/go/src/notmuch/notmuch.go |  253 +++++++++++++++++++++++++++++++++++-
 1 files changed, 252 insertions(+), 1 deletions(-)

diff --git a/bindings/go/src/notmuch/notmuch.go b/bindings/go/src/notmuch/notmuch.go
index be4cb8c..f667dbb 100644
--- a/bindings/go/src/notmuch/notmuch.go
+++ b/bindings/go/src/notmuch/notmuch.go
@@ -12,6 +12,8 @@ package notmuch
 */
 import "C"
 import "runtime"
+import "strings"
+import "time"
 import "unsafe"
 
 // Status codes used for the return values of most functions
@@ -700,7 +702,20 @@ func (self *Query) CountMessages() uint {
 	return uint(C.notmuch_query_count_messages(self.query))
 }
 
-// TODO: wrap threads and thread
+/* Return the number of threads matching a search.
+ *
+ * This function performs a search and returns the number of unique thread IDs
+ * in the matching messages. This is the same as number of threads matching a
+ * search.
+ *
+ * Note that this is a significantly heavier operation than
+ * notmuch_query_count_messages().
+ *
+ * If an error occurs, this function may return 0.
+ */
+func (self *Query) CountThreads() uint {
+	return uint(C.notmuch_query_count_threads(self.query))
+}
 
 /* Is the given 'threads' iterator pointing at a valid thread.
  *
@@ -722,6 +737,45 @@ func (self *Threads) Valid() bool {
 	return true
 }
 
+/* Get the current thread from 'threads' as a notmuch_thread_t.
+ *
+ * Note: The returned thread belongs to 'threads' and has a lifetime
+ * identical to it (and the query to which it belongs).
+ *
+ * See the documentation of notmuch_query_search_threads for example
+ * code showing how to iterate over a notmuch_threads_t object.
+ *
+ * If an out-of-memory situation occurs, this function will return
+ * NULL.
+ */
+func (self *Threads) Get() *Thread {
+	if self.threads == nil {
+		return nil
+	}
+	thread := C.notmuch_threads_get(self.threads)
+	if thread == nil {
+		return nil
+	}
+	return createThread(thread, self)
+}
+
+/* Move the 'threads' iterator to the next thread.
+ *
+ * If 'threads' is already pointing at the last thread then the
+ * iterator will be moved to a point just beyond that last thread,
+ * (where notmuch_threads_valid will return FALSE and
+ * 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) MoveToNext() {
+	if self.threads == nil {
+		return
+	}
+	C.notmuch_threads_move_to_next(self.threads)
+}
+
 /* Destroy a notmuch_threads_t object.
  *
  * It's not strictly necessary to call this function. All memory from
@@ -735,6 +789,203 @@ func (self *Threads) Destroy() {
 	}
 }
 
+/* Get the thread ID of 'thread'.
+ *
+ * The returned string belongs to 'thread' and as such, should not be
+ * modified by the caller and will only be valid for as long as the
+ * thread is valid, (which is until notmuch_thread_destroy or until
+ * the query from which it derived is destroyed).
+ */
+func (self *Thread) GetThreadId() string {
+	if self.thread == nil {
+		return ""
+	}
+	id := C.notmuch_thread_get_thread_id(self.thread)
+
+	if id == nil {
+		return ""
+	}
+
+	return C.GoString(id)
+}
+
+/* Get the total number of messages in 'thread'.
+ *
+ * This count consists of all messages in the database belonging to
+ * this thread. Contrast with notmuch_thread_get_matched_messages() .
+ */
+func (self *Thread) GetTotalMessages() int {
+	if self.thread == nil {
+		return 0
+	}
+	return int(C.notmuch_thread_get_total_messages(self.thread))
+}
+
+/* Get a notmuch_messages_t iterator for the top-level messages in
+ * 'thread'.
+ *
+ * This iterator will not necessarily iterate over all of the messages
+ * in the thread. It will only iterate over the messages in the thread
+ * which are not replies to other messages in the thread.
+ *
+ * To iterate over all messages in the thread, the caller will need to
+ * iterate over the result of notmuch_message_get_replies for each
+ * top-level message (and do that recursively for the resulting
+ * messages, etc.).
+ */
+func (self *Thread) GetToplevelMessages() *Messages {
+	if self.thread == nil {
+		return nil
+	}
+	msgs := C.notmuch_thread_get_toplevel_messages(self.thread)
+	if msgs == nil {
+		return nil
+	}
+	return createMessages(msgs, self)
+}
+
+/* Get a notmuch_messages_t iterator for the top-level messages in
+ * 'thread'.
+ *
+ * This iterator will not necessarily iterate over all of the messages
+ * in the thread. It will only iterate over the messages in the thread
+ * which are not replies to other messages in the thread.
+ *
+ * To iterate over all messages in the thread, the caller will need to
+ * iterate over the result of notmuch_message_get_replies for each
+ * top-level message (and do that recursively for the resulting
+ * messages, etc.).
+ */
+func (self *Thread) GetMatchedMessages() int {
+	if self.thread == nil {
+		return 0
+	}
+	return int(C.notmuch_thread_get_matched_messages(self.thread))
+}
+
+/* Get a notmuch_messages_t iterator for the top-level messages in
+ * 'thread'.
+ *
+ * This iterator will not necessarily iterate over all of the messages
+ * in the thread. It will only iterate over the messages in the thread
+ * which are not replies to other messages in the thread.
+ *
+ * To iterate over all messages in the thread, the caller will need to
+ * iterate over the result of notmuch_message_get_replies for each
+ * top-level message (and do that recursively for the resulting
+ * messages, etc.).
+ */
+func (self *Thread) GetAuthors() []string {
+	if self.thread == nil {
+		return make([]string, 0)
+	}
+	authors_str := C.notmuch_thread_get_authors(self.thread)
+
+	if authors_str == nil {
+		return make([]string, 0)
+	}
+
+	return strings.Split(C.GoString(authors_str), ", ")
+}
+
+/* Get the subject of 'thread'
+ *
+ * The subject is taken from the first message (according to the query
+ * order---see notmuch_query_set_sort) in the query results that
+ * belongs to this thread.
+ *
+ * The returned string belongs to 'thread' and as such, should not be
+ * modified by the caller and will only be valid for as long as the
+ * thread is valid, (which is until notmuch_thread_destroy or until
+ * the query from which it derived is destroyed).
+ */
+func (self *Thread) GetSubject() string {
+	if self.thread == nil {
+		return ""
+	}
+	subject := C.notmuch_thread_get_subject(self.thread)
+
+	if subject == nil {
+		return ""
+	}
+
+	return C.GoString(subject)
+}
+
+/* Get the date of the oldest message in 'thread' as a time_t value.
+ */
+func (self *Thread) GetOldestDate() time.Time {
+	if self.thread == nil {
+		return time.Unix(0, 0)
+	}
+	return time.Unix(int64(C.notmuch_thread_get_oldest_date(self.thread)), 0)
+}
+
+/* Get the date of the newest message in 'thread' as a time_t value.
+ */
+func (self *Thread) GetNewestDate() time.Time {
+	if self.thread == nil {
+		return time.Unix(0, 0)
+	}
+	return time.Unix(int64(C.notmuch_thread_get_oldest_date(self.thread)), 0)
+}
+
+/* Get the tags for 'thread', returning a notmuch_tags_t object which
+ * can be used to iterate over all tags.
+ *
+ * Note: In the Notmuch database, tags are stored on individual
+ * messages, not on threads. So the tags returned here will be all
+ * tags of the messages which matched the search and which belong to
+ * this thread.
+ *
+ * The tags object is owned by the thread and as such, will only be
+ * valid for as long as the thread is valid, (for example, until
+ * notmuch_thread_destroy or until the query from which it derived is
+ * destroyed).
+ *
+ * Typical usage might be:
+ *
+ *     notmuch_thread_t *thread;
+ *     notmuch_tags_t *tags;
+ *     const char *tag;
+ *
+ *     thread = notmuch_threads_get (threads);
+ *
+ *     for (tags = notmuch_thread_get_tags (thread);
+ *          notmuch_tags_valid (tags);
+ *          notmuch_result_move_to_next (tags))
+ *     {
+ *         tag = notmuch_tags_get (tags);
+ *         ....
+ *     }
+ *
+ *     notmuch_thread_destroy (thread);
+ *
+ * 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 *Thread) GetTags() *Tags {
+	if self.thread == nil {
+		return nil
+	}
+	tags := C.notmuch_thread_get_tags(self.thread)
+	if tags == nil {
+		return nil
+	}
+	return createTags(tags, self)
+}
+
+/* Destroy a notmuch_thread_t object. */
+func (self *Thread) Destroy() {
+	if self.thread == nil {
+		return
+	}
+	C.notmuch_thread_destroy(self.thread)
+	self.thread = nil
+}
+
 /* Is the given 'messages' iterator pointing at a valid message.
  *
  * When this function returns TRUE, notmuch_messages_get will return a
-- 
1.7.7.6