Fix showing duplicated messages

This commit also has some other changes sprinkled in but the main
effect is that messages are only shown precisely once. Next stage must
be to move away from serv_got_im and friends.

README.md

@@ -19,8 +19,14 @@ mobile clients to send and receive IMs over SMTP+IMAP. It may be useful for
 GUI desktop usage **without** an Electron dependency, or console desktop usage.
 
 Current status is probably best described as "skunkworks", although connecting
-to an account and sending / receiving text messages should work reliably. You
-can view specific progress on [the issue board](https://gitlab.com/lupine/purple-plugin-delta/boards).
+to an account and sending / receiving text and image messages should work
+reliably in pidgin. Chatty supports text messages, and can be coaxed into using
+this plugin, but there's a long way to go with that yet.
+
+A big refactoring to use "proper" purple IM structures is necessary to make
+further progress, I think.
+
+I also need to implement support for the buddy list.
 
 We currrently build against deltachat v1.50.0. You'll need to build and install
 deltachat-ffi separately and ensure that it's available via `pkg-config` for

delta-connection.c

@@ -14,7 +14,7 @@
 
 #define IMEX_RECEIVED_MESSAGE "Setup message received. To apply it, reply with:\nIMEX: %d nnnn-nnnn-nnnn-nnnn-nnnn-nnnn-nnnn-nnnn-nnnn\nNo whitespace in the setup-code!"
 
-void delta_recv_im(DeltaConnectionData *conn, uint32_t msg_id);
+void delta_recv_im(DeltaConnectionData *conn, dc_msg_t *msg);
 
 void
 _transpose_config(dc_context_t *mailbox, PurpleAccount *acct)
@@ -59,6 +59,7 @@ typedef struct {
 
 	// Used by delta_process_incoming_message
 	uint32_t msg_id;
+	gboolean msg_changed;
 
 	// Used by delta_process_connection_state
 	int connection_state;
@@ -71,8 +72,9 @@ delta_process_incoming_message(void *data)
 	g_assert(pr != NULL);
 	g_assert(pr->conn != NULL);
 
-	delta_recv_im(pr->conn, pr->msg_id);
-
+	dc_msg_t *msg = dc_get_msg(pr->conn->mailbox, pr->msg_id);
+	delta_recv_im(pr->conn, msg);
+	dc_msg_unref(msg);
 	g_free(data);
 
 	return FALSE;
@@ -107,19 +109,24 @@ delta_process_fresh_messages(void *data)
 	ProcessRequest *pr = (ProcessRequest *)data;
 	g_assert(pr != NULL);
 	g_assert(pr->conn != NULL);
-	g_assert(pr->conn->mailbox != NULL);
+
+	dc_context_t *mailbox = pr->conn->mailbox;
+	g_assert(mailbox != NULL);
 
 	// Spot any messages received while offline
-	dc_array_t *fresh_msgs = dc_get_fresh_msgs(pr->conn->mailbox);
+	dc_array_t *fresh_msgs = dc_get_fresh_msgs(mailbox);
 	size_t fresh_count = dc_array_get_cnt(fresh_msgs);
 
 	purple_debug_info(PLUGIN_ID, "fresh_count: %zu\n", fresh_count);
 
 	for(size_t i = 0; i < fresh_count; i++) {
-		delta_recv_im(pr->conn, dc_array_get_id(fresh_msgs, i));
+		uint32_t msg_id = dc_array_get_id(fresh_msgs, i);
+		dc_msg_t *msg = dc_get_msg(mailbox, msg_id);
+
+		delta_recv_im(pr->conn, msg);
 	}
 
-	g_free(fresh_msgs);
+	dc_array_unref(fresh_msgs);
 
 	return FALSE;
 }
@@ -194,8 +201,10 @@ delta_event_handler(void *context)
 
 			pr = delta_build_process_request(conn);
 			if (msg_id) {
-				// FIXME: they won't all be incoming. Some will be changed
+				// FIXME: for now, only display IMEX setup messages to avoid duplicates
 				pr->msg_id = msg_id;
+				pr->msg_changed = TRUE;
+
 				purple_timeout_add(0, delta_process_incoming_message, pr);
 			} else {
 				purple_timeout_add(0, delta_process_fresh_messages, pr);
@@ -419,11 +428,11 @@ next:
 	}
 	g_free(stripped_message);
 
-	return 1; // success; echo the message to the chat window
+	return 0; // success; don't echo the message to the chat window since we display it anyway
 }
 
 void
-delta_recv_im(DeltaConnectionData *conn, uint32_t msg_id)
+delta_recv_im(DeltaConnectionData *conn, dc_msg_t *msg)
 {
 	dc_context_t *mailbox = conn->mailbox;
 	g_assert(mailbox != NULL);
@@ -431,11 +440,12 @@ delta_recv_im(DeltaConnectionData *conn, uint32_t msg_id)
 	PurpleConnection *pc = conn->pc;
 	g_assert(pc != NULL);
 
-	dc_msg_t *msg = dc_get_msg(mailbox, msg_id);
+	uint32_t msg_id = dc_msg_get_id(msg);
 	int viewtype = dc_msg_get_viewtype(msg);
 	time_t timestamp = dc_msg_get_timestamp(msg);
 	char *text = dc_msg_get_text(msg);
 	uint32_t chat_id = dc_msg_get_chat_id(msg);
+	dc_contact_t *from = dc_get_contact(mailbox, dc_msg_get_from_id(msg));
 	dc_chat_t *chat = dc_get_chat(mailbox, chat_id);
 	dc_array_t *contacts = dc_get_chat_contacts(mailbox, chat_id);
 	int num_contacts = dc_array_get_cnt(contacts);
@@ -468,14 +478,21 @@ delta_recv_im(DeltaConnectionData *conn, uint32_t msg_id)
 		who = dc_chat_get_name(chat);
 	}
 
-	int flags = PURPLE_MESSAGE_RECV;
+	int flags = 0;
+	int state = dc_msg_get_state(msg);
+
+	if (state == DC_STATE_IN_FRESH || state == DC_STATE_IN_NOTICED || state == DC_STATE_IN_SEEN) {
+		flags |= PURPLE_MESSAGE_RECV;
+	} else {
+		flags |= PURPLE_MESSAGE_SEND;
+	}
 
 	// FIXME: as a massive hack, convert IMEX setup messages into a text message
 	// prompting the user how to trigger the IMEX filter in outgoing messages.
 	if (dc_msg_is_setupmessage(msg)) {
 		purple_debug_info(PLUGIN_ID, "Receiving IMEX: ID=%d\n", msg_id);
 		viewtype = DC_MSG_TEXT;
-		g_free(text);
+		dc_str_unref(text);
 		text = g_strndup("", 1024);
 		g_assert(text != NULL);
 
@@ -519,18 +536,25 @@ delta_recv_im(DeltaConnectionData *conn, uint32_t msg_id)
 		text = g_strdup_printf("<img id='%d'>", image_id);
 	}
 
-	serv_got_im(pc, who, text, flags, timestamp);
+	char *name = dc_contact_get_name(from);
+	int msglen = strlen(name) + 3 + strlen(text);
+
+	char *msgtext = malloc(msglen);
+	g_snprintf(msgtext, msglen, "%s: %s", name, text);
+
+	serv_got_im(pc, who, msgtext, flags, timestamp);
 
 	if (image_id > 0) {
 		purple_imgstore_unref_by_id(image_id);
 	}
 
 	dc_markseen_msgs(mailbox, &msg_id, 1);
-	g_free(who);
+	g_free(msgtext);
+	dc_str_unref(who);
+	dc_str_unref(name);
 	dc_contact_unref(contact);
 out:
-	g_free(text);
-	dc_msg_unref(msg);
+	dc_str_unref(text);
 	dc_chat_unref(chat);
 	dc_array_unref(contacts);
 }

libdelta.h

@@ -8,7 +8,8 @@
 #define DELTA_PROTOCOL_OPTS \
 	OPT_PROTO_UNIQUE_CHATNAME | \
 	OPT_PROTO_CHAT_TOPIC | \
-	OPT_PROTO_IM_IMAGE
+	OPT_PROTO_IM_IMAGE | \
+	OPT_PROTO_MAIL_CHECK
 
 // These two will instead be the pidgin "username" and "password" options that
 // I can't seem to get rid of.