xep-0308: Implement /correct to correct the last send message

So far the correction is sent. But the UI in Profanity itself is not
updated.

Also autocompletion for `/correct` with the last sent message is
missing.

src/command/cmd_ac.c

@@ -114,6 +114,7 @@ static char* _logging_autocomplete(ProfWin *window, const char *const input, gbo
 static char* _color_autocomplete(ProfWin *window, const char *const input, gboolean previous);
 static char* _avatar_autocomplete(ProfWin *window, const char *const input, gboolean previous);
 static char* _correction_autocomplete(ProfWin *window, const char *const input, gboolean previous);
+static char* _correct_autocomplete(ProfWin *window, const char *const input, gboolean previous);
 
 static char* _script_autocomplete_func(const char *const prefix, gboolean previous, void *context);
 
@@ -1640,6 +1641,7 @@ _cmd_ac_complete_params(ProfWin *window, const char *const input, gboolean previ
     g_hash_table_insert(ac_funcs, "/color",         _color_autocomplete);
     g_hash_table_insert(ac_funcs, "/avatar",        _avatar_autocomplete);
     g_hash_table_insert(ac_funcs, "/correction",    _correction_autocomplete);
+    g_hash_table_insert(ac_funcs, "/correct",       _correct_autocomplete);
 
     int len = strlen(input);
     char parsed[len+1];
@@ -3736,3 +3738,12 @@ _correction_autocomplete(ProfWin *window, const char *const input, gboolean prev
 
     return NULL;
 }
+
+static char*
+_correct_autocomplete(ProfWin *window, const char *const input, gboolean previous)
+{
+    char *result = NULL;
+
+    //TODO: get last message
+    return result;
+}

src/command/cmd_defs.c

@@ -2367,6 +2367,7 @@ static struct cmd_t command_defs[] =
         CMD_NOSUBFUNCS
         CMD_MAINFUNC(cmd_correction)
         CMD_TAGS(
+            CMD_TAG_UI,
             CMD_TAG_CHAT,
             CMD_TAG_GROUPCHAT)
         CMD_SYN(
@@ -2379,6 +2380,22 @@ static struct cmd_t command_defs[] =
             { "char",    "Set character that will prefix corrected messages. Default: +"})
         CMD_NOEXAMPLES
     },
+
+    { "/correct",
+        parse_args, 1, 1, NULL,
+        CMD_NOSUBFUNCS
+        CMD_MAINFUNC(cmd_correct)
+        CMD_TAGS(
+            CMD_TAG_CHAT,
+            CMD_TAG_GROUPCHAT)
+        CMD_SYN(
+            "/correct <message>")
+        CMD_DESC(
+            "Correct and resend the last message (XEP-0308).")
+        CMD_ARGS(
+            { "<message>",    "The corrected message."})
+        CMD_NOEXAMPLES
+    },
 };
 
 static GHashTable *search_index;

src/command/cmd_funcs.c

@@ -8680,3 +8680,44 @@ cmd_correction(ProfWin *window, const char *const command, gchar **args)
 
     return TRUE;
 }
+
+gboolean
+cmd_correct(ProfWin *window, const char *const command, gchar **args)
+{
+    jabber_conn_status_t conn_status = connection_get_status();
+    if (conn_status != JABBER_CONNECTED) {
+        cons_show("You are currently not connected.");
+        return TRUE;
+    }
+
+    if (window->type == WIN_CHAT) {
+        ProfChatWin *chatwin = (ProfChatWin*)window;
+        assert(chatwin->memcheck == PROFCHATWIN_MEMCHECK);
+
+        if (chatwin->last_msg_id == NULL || chatwin->last_message == NULL) {
+            win_println(window, THEME_DEFAULT, '!', "No last message to correct.");
+            return TRUE;
+        }
+
+        /*
+        char *session_jid = chat_session_get_jid(chatwin->barejid);
+        if (session_jid == NULL) {
+            win_println(window, THEME_DEFAULT, '!', "Cannot determine if recipeint supports last message correction.");
+            free(session_jid);
+            return TRUE;
+        }
+
+        if (caps_jid_has_feature(session_jid, XMPP_FEATURE_LAST_MESSAGE_CORRECTION) == FALSE) {
+            win_println(window, THEME_DEFAULT, '!', "Recipient does not support last message correction.");
+            free(session_jid);
+            return TRUE;
+        }
+
+        */
+        // speciel send with replace tag
+        cl_ev_send_msg_correct(chatwin, args[0], FALSE, TRUE);
+    }
+
+    win_println(window, THEME_DEFAULT, '!', "Command /correct only valid in regular chat windows.");
+    return TRUE;
+}

src/command/cmd_funcs.h

@@ -228,4 +228,5 @@ gboolean cmd_color(ProfWin *window, const char *const command, gchar **args);
 gboolean cmd_avatar(ProfWin *window, const char *const command, gchar **args);
 gboolean cmd_os(ProfWin *window, const char *const command, gchar **args);
 gboolean cmd_correction(ProfWin *window, const char *const command, gchar **args);
+gboolean cmd_correct(ProfWin *window, const char *const command, gchar **args);
 #endif