mod_mix_pam: Remove SPID tracking

mod_mix_pam/mod_mix_pam.lua

@@ -10,13 +10,13 @@ local st = require("util.stanza");
 local rm_remove_from_roster = require("core.rostermanager").remove_from_roster;
 local rm_add_to_roster = require("core.rostermanager").add_to_roster;
 local rm_roster_push = require("core.rostermanager").roster_push;
+local rm_load_roster = require("core.rostermanager").load_roster;
 
 -- Persistent storage
 local mix_pam = module:open_store("mix_pam", "keyval");
 
 -- Runtime data
-local mix_hosts = {};
-local mix_spids = {}; -- user -> channel -> spid
+local mix_hosts = {}; -- MIX host's JID -> Reference Counter
 
 -- Namespaceing
 local mix_pam_xmlns = "urn:xmpp:mix:pam:2";
@@ -26,33 +26,6 @@ module:add_feature(mix_pam_xmlns);
 -- NOTE: To show that we archive messages
 -- module:add_feature(mix_pam_xmlns.."#archive");
 
-local function contains_key(table, key)
-    -- Returns true if table contains the key key. Returns false
-    -- otherwise.
-    return table[key] ~= nil;
-end
-
-local function set_mix_spid(user, channel, spid)
-    if mix_spids[user] ~= nil then
-        mix_spids[user][channel] = spid;
-    else
-        mix_spids[user] = { [channel] = spid };
-    end
-
-    mix_pam:set("spids", mix_spids);
-end
-local function get_mix_spid(user, channel)
-    return mix_spids[user][channel];
-end;
-local function remove_mix_spid(user, channel)
-    mix_spids[user][channel] = nil;
-    if mix_spids[user][channel] == {} then
-        mix_spids[user][channel] = nil;
-    end
-
-    mix_pam:set("spids", mix_spids);
-end
-
 local function add_mix_host(host)
     if mix_hosts[host] ~= nil then
         mix_hosts[host] = mix_hosts[host] + 1;
@@ -99,24 +72,6 @@ function module.load()
     for host, _ in pairs(mix_hosts) do
         module:log("debug", "Known host: %s", host);
     end
-
-    mix_spids = mix_pam:get("spids");
-    module:log("info", "Loaded known MIX SPIDs");
-
-    if mix_spids == nil then
-        module:log("info", "No known MIX SPIDs loaded");
-        mix_spids = {};
-    end
-    for user, channel_map in pairs(mix_spids) do
-        module:log("debug", "-- %s", user);
-        if channel_map[user] then
-            for channel, spid in pairs(channel_map[user]) do
-                module:log("debug", "%s -> %s", channel, spid);
-            end
-        else
-            module:log("warn", "User mapping empty");
-        end
-    end
 end
 
 local client_state_tracker = {}; -- [stanza ID] -> resource
@@ -217,9 +172,6 @@ end);
 local function handle_mix_join(event)
     -- The MIX server responded
     module:log("debug", "Received MIX-JOIN result");
-    module:log("debug", "Adding %s as a new MIX host", jid.host(event.stanza.attr.from));
-    add_mix_host(jid.host(event.stanza.attr.from));
-    mix_pam:set("hosts", mix_hosts);
 
     local stanza = event.stanza;
     local spid = stanza:get_child("join", "urn:xmpp:mix:core:1").attr.id;
@@ -232,9 +184,6 @@ local function handle_mix_join(event)
         return false;
     end
 
-    -- Keep track of the SPID
-    set_mix_spid(stanza.attr.to, stanza.attr.from, spid);
-
     local client_join = st.iq({
         type = "result";
         id = stanza.attr.id;
@@ -249,8 +198,10 @@ local function handle_mix_join(event)
     rm_add_to_roster(origin, stanza.attr.from, {
         subscription = "both",
         groups = {},
+        mix_spid = spid,
     });
     rm_roster_push(jid.node(stanza.attr.to), module_host, stanza.attr.from);
+    add_mix_host(jid.bare(stanza.attr.from));
 
     return true;
 end
@@ -258,8 +209,6 @@ end
 local function handle_mix_leave(event)
     -- The MIX server responded
     module:log("debug", "Received MIX-LEAVE result");
-    remove_mix_host(jid.host(event.stanza.attr.from));
-    mix_pam:set("hosts", mix_hosts);
 
     local stanza = event.stanza;
     local origin = pop_state(stanza.attr.id);
@@ -270,9 +219,6 @@ local function handle_mix_leave(event)
         return false;
     end
 
-    -- Keep track of the SPID
-    set_mix_spid(stanza.attr.to, jid.bare(stanza.attr.from));
-
     local client_leave = st.iq({
         type = "result";
         id = stanza.attr.id;
@@ -287,6 +233,7 @@ local function handle_mix_leave(event)
     -- TODO: Error handling
     rm_remove_from_roster(origin, jid.bare(stanza.attr.from));
     rm_roster_push(jid.node(stanza.attr.to), module_host, jid.bare(stanza.attr.from));
+    remove_mix_host(jid.bare(stanza.attr.from));
 
     return true;
 end
@@ -348,13 +295,19 @@ module:hook("roster-get", function(event)
     module:log("debug", "Annotated roster request received");
 
     -- User requested the roster with an <annotate/>
-    for item in event.reply:get_child("query", "jabber:iq:roster"):children() do
-        if contains_key(mix_hosts, jid.host(item.attr.jid)) then
-            local spid = get_mix_spid(jid.bare(stanza.attr.from), item.attr.jid);
+    local roster = rm_load_roster(jid.bare(stanza.attr.from));
+    local query = event.reply:get_child("query", "jabber:iq:roster");
+    for contact, roster_item in pairs(roster) do
+        if roster_item["mix_spid"] ~= nil then
+            for _, item in ipairs(query:childtags("item")) do
+                if item.attr.jid == contact then
                     item:tag("channel", {
                         xmlns = mix_roster_xmlns,
-                ["participant-id"] = spid,
+                        ["participant-id"] = roster_item["mix_spid"],
                     });
+                    break;
+                end
+            end
         end
     end
 end);