feat(caps): add cache clearing to /caps

Add /caps clear to wipe the local capabilities cache.
Implement autocomplete for new subcommand.

src/command/cmd_ac.c

@@ -42,6 +42,7 @@
 
 #include "ai/ai_client.h"
 
+static char* _caps_autocomplete(ProfWin* window, const char* const input, gboolean previous);
 static char* _sub_autocomplete(ProfWin* window, const char* const input, gboolean previous);
 static char* _notify_autocomplete(ProfWin* window, const char* const input, gboolean previous);
 static char* _theme_autocomplete(ProfWin* window, const char* const input, gboolean previous);
@@ -151,6 +152,7 @@ static Autocomplete account_clear_ac;
 static Autocomplete account_default_ac;
 static Autocomplete account_status_ac;
 static Autocomplete disco_ac;
+static Autocomplete caps_subcommands_ac;
 static Autocomplete wins_ac;
 static Autocomplete roster_ac;
 static Autocomplete roster_show_ac;
@@ -321,6 +323,7 @@ static Autocomplete* all_acs[] = {
     &account_default_ac,
     &account_status_ac,
     &disco_ac,
+    &caps_subcommands_ac,
     &wins_ac,
     &roster_ac,
     &roster_show_ac,
@@ -597,6 +600,8 @@ cmd_ac_init(void)
     autocomplete_add(disco_ac, "info");
     autocomplete_add(disco_ac, "items");
 
+    autocomplete_add(caps_subcommands_ac, "clear");
+
     autocomplete_add(account_ac, "list");
     autocomplete_add(account_ac, "show");
     autocomplete_add(account_ac, "add");
@@ -1414,6 +1419,7 @@ cmd_ac_init(void)
     g_hash_table_insert(ac_funcs, "/ban", _ban_autocomplete);
     g_hash_table_insert(ac_funcs, "/blocked", _blocked_autocomplete);
     g_hash_table_insert(ac_funcs, "/bookmark", _bookmark_autocomplete);
+    g_hash_table_insert(ac_funcs, "/caps", _caps_autocomplete);
     g_hash_table_insert(ac_funcs, "/clear", _clear_autocomplete);
     g_hash_table_insert(ac_funcs, "/close", _close_autocomplete);
     g_hash_table_insert(ac_funcs, "/cmd", _adhoc_cmd_autocomplete);
@@ -1985,6 +1991,35 @@ _cmd_ac_complete_params(ProfWin* window, const char* const input, gboolean previ
     return NULL;
 }
 
+static char*
+_caps_autocomplete(ProfWin* window, const char* const input, gboolean previous)
+{
+    char* result = NULL;
+    result = autocomplete_param_with_ac(input, "/caps", caps_subcommands_ac, TRUE, previous);
+    if (result) {
+        return result;
+    }
+    if (window->type == WIN_MUC) {
+        ProfMucWin* mucwin = (ProfMucWin*)window;
+        assert(mucwin->memcheck == PROFMUCWIN_MEMCHECK);
+        Autocomplete nick_ac = muc_roster_ac(mucwin->roomjid);
+        if (nick_ac) {
+            result = autocomplete_param_with_ac(input, "/caps", nick_ac, TRUE, previous);
+        }
+    } else if (connection_get_status() == JABBER_CONNECTED) {
+        result = autocomplete_param_with_func(input, "/caps", roster_contact_autocomplete, previous, NULL);
+        if (result) {
+            return result;
+        }
+        result = autocomplete_param_with_func(input, "/caps", roster_barejid_autocomplete, previous, NULL);
+        if (result) {
+            return result;
+        }
+        result = autocomplete_param_with_func(input, "/caps", roster_fulljid_autocomplete, previous, NULL);
+    }
+    return result;
+}
+
 static char*
 _sub_autocomplete(ProfWin* window, const char* const input, gboolean previous)
 {

src/command/cmd_defs.c

@@ -427,17 +427,21 @@ static const struct cmd_t command_defs[] = {
               CMD_TAG_GROUPCHAT)
       CMD_SYN(
               "/caps",
-              "/caps <fulljid>|<nick>")
+              "/caps <fulljid>|<nick>",
+              "/caps clear")
       CMD_DESC(
               "Find out a contacts, or room members client software capabilities. "
-              "If in private chat initiated from a chat room, no parameter is required.")
+              "If in private chat initiated from a chat room, no parameter is required. "
+              "Use clear to remove all cached capabilities.")
       CMD_ARGS(
               { "<fulljid>", "If in the console or a chat window, the full JID for which you wish to see capabilities." },
-              { "<nick>", "If in a chat room, nickname for which you wish to see capabilities." })
+              { "<nick>", "If in a chat room, nickname for which you wish to see capabilities." },
+              { "clear", "Clear all cached capabilities." })
       CMD_EXAMPLES(
               "/caps ran@cold.sea.org/laptop",
               "/caps ran@cold.sea.org/phone",
-              "/caps aegir")
+              "/caps aegir",
+              "/caps clear")
     },
 
     { CMD_PREAMBLE("/software",

src/command/cmd_funcs.c

@@ -70,6 +70,7 @@
 #include "xmpp/stanza.h"
 #include "xmpp/vcard_funcs.h"
 #include "xmpp/xmpp.h"
+#include "xmpp/capabilities.h"
 
 #ifdef HAVE_LIBOTR
 #include "otr/otr.h"
@@ -3387,6 +3388,12 @@ cmd_caps(ProfWin* window, const char* const command, gchar** args)
         return TRUE;
     }
 
+    if (g_strcmp0(args[0], "clear") == 0) {
+        caps_cache_clear();
+        cons_show("Capabilities cache cleared.");
+        return TRUE;
+    }
+
     switch (window->type) {
     case WIN_MUC:
         if (args[0]) {
@@ -3405,6 +3412,7 @@ cmd_caps(ProfWin* window, const char* const command, gchar** args)
         break;
     case WIN_CHAT:
     case WIN_CONSOLE:
+    case WIN_XML:
         if (args[0]) {
             auto_jid Jid* jid = jid_create(args[0]);
 

src/xmpp/capabilities.c

@@ -23,6 +23,7 @@
 #include "plugins/plugins.h"
 #include "config/files.h"
 #include "config/preferences.h"
+#include "xmpp/connection.h"
 #include "xmpp/xmpp.h"
 #include "xmpp/stanza.h"
 #include "xmpp/form.h"
@@ -271,6 +272,16 @@ caps_map_jid_to_ver(const char* const jid, const char* const ver)
     g_hash_table_insert(jid_to_ver, strdup(jid), strdup(ver));
 }
 
+void
+caps_cache_clear(void)
+{
+    g_hash_table_remove_all(jid_to_ver);
+    g_hash_table_remove_all(jid_to_caps);
+    cache = g_key_file_new();
+    caps_prof_keyfile.keyfile = cache;
+    save_keyfile(&caps_prof_keyfile);
+}
+
 gboolean
 caps_cache_contains(const char* const ver)
 {

src/xmpp/capabilities.h

@@ -28,5 +28,6 @@ void caps_map_jid_to_ver(const char* const jid, const char* const ver);
 gboolean caps_cache_contains(const char* const ver);
 GList* caps_get_features(void);
 char* caps_get_my_sha1(xmpp_ctx_t* const ctx);
+void caps_cache_clear(void);
 
 #endif

tests/unittests/xmpp/stub_xmpp.c

@@ -500,6 +500,11 @@ caps_jid_has_feature(const char* const jid, const char* const feature)
     return FALSE;
 }
 
+void
+caps_cache_clear(void)
+{
+}
+
 gboolean
 bookmark_add(const char* jid, const char* nick, const char* password, const char* autojoin_str, const char* name)
 {