util.sql: Remove unused functions and unused commented code

[prosody.git] / util / pubsub.lua

diff --git a/util/pubsub.lua b/util/pubsub.lua
index e7fc86b10c23d706b1c6792bcb22eabd74ab3032..c15a41d7d059a8751485097253e913b56ff7f46f 100644 (file)
--- a/util/pubsub.lua
+++ b/util/pubsub.lua
@@ -1,23 +1,29 @@
 local events = require "util.events";
+local t_remove = table.remove;
 
 module("pubsub", package.seeall);
 
 local service = {};
 local service_mt = { __index = service };
 
-local default_config = {
+local default_config = { __index = {
        broadcaster = function () end;
        get_affiliation = function () end;
        capabilities = {};
-};
+} };
+local default_node_config = { __index = {
+       ["pubsub#max_items"] = "20";
+} };
 
 function new(config)
        config = config or {};
        return setmetatable({
-               config = setmetatable(config, { __index = default_config });
+               config = setmetatable(config, default_config);
+               node_defaults = setmetatable(config.node_defaults or {}, default_node_config);
                affiliations = {};
                subscriptions = {};
                nodes = {};
+               data = {};
                events = events.new();
        }, service_mt);
 end
@@ -29,13 +35,13 @@ end
 
 function service:may(node, actor, action)
        if actor == true then return true; end
-       
+
        local node_obj = self.nodes[node];
        local node_aff = node_obj and node_obj.affiliations[actor];
        local service_aff = self.affiliations[actor]
                         or self.config.get_affiliation(actor, node, action)
                         or "none";
-       
+
        -- Check if node allows/forbids it
        local node_capabilities = node_obj and node_obj.capabilities;
        if node_capabilities then
@@ -47,7 +53,7 @@ function service:may(node, actor, action)
                        end
                end
        end
-       
+
        -- Check service-wide capabilities instead
        local service_capabilities = self.config.capabilities;
        local caps = service_capabilities[node_aff or service_aff];
@@ -57,7 +63,7 @@ function service:may(node, actor, action)
                        return can;
                end
        end
-       
+
        return false;
 end
 
@@ -202,7 +208,7 @@ function service:get_subscription(node, actor, jid)
        return true, node_obj.subscribers[jid];
 end
 
-function service:create(node, actor)
+function service:create(node, actor, options)
        -- Access checking
        if not self:may(node, actor, "create") then
                return false, "forbidden";
@@ -211,17 +217,20 @@ function service:create(node, actor)
        if self.nodes[node] then
                return false, "conflict";
        end
-       
+
+       self.data[node] = {};
        self.nodes[node] = {
                name = node;
                subscribers = {};
-               config = {};
-               data = {};
+               config = setmetatable(options or {}, {__index=self.node_defaults});
                affiliations = {};
        };
+       setmetatable(self.nodes[node], { __index = { data = self.data[node] } }); -- COMPAT
+       self.events.fire_event("node-created", { node = node, actor = actor });
        local ok, err = self:set_affiliation(node, true, actor, "owner");
        if not ok then
                self.nodes[node] = nil;
+               self.data[node] = nil;
        end
        return ok, err;
 end
@@ -233,11 +242,35 @@ function service:delete(node, actor)
        end
        --
        local node_obj = self.nodes[node];
+       if not node_obj then
+               return false, "item-not-found";
+       end
        self.nodes[node] = nil;
+       self.data[node] = nil;
+       self.events.fire_event("node-deleted", { node = node, actor = actor });
        self.config.broadcaster("delete", node, node_obj.subscribers);
        return true;
 end
 
+local function remove_item_by_id(data, id)
+       if not data[id] then return end
+       data[id] = nil;
+       for i, _id in ipairs(data) do
+               if id == _id then
+                       t_remove(data, i);
+                       return i;
+               end
+       end
+end
+
+local function trim_items(data, max)
+       max = tonumber(max);
+       if not max or #data <= max then return end
+       repeat
+               data[t_remove(data, 1)] = nil;
+       until #data <= max
+end
+
 function service:publish(node, actor, id, item)
        -- Access checking
        if not self:may(node, actor, "publish") then
@@ -255,9 +288,13 @@ function service:publish(node, actor, id, item)
                end
                node_obj = self.nodes[node];
        end
-       node_obj.data[id] = item;
+       local node_data = self.data[node];
+       remove_item_by_id(node_data, id);
+       node_data[#node_data + 1] = id;
+       node_data[id] = item;
+       trim_items(node_data, node_obj.config["pubsub#max_items"]);
        self.events.fire_event("item-published", { node = node, actor = actor, id = id, item = item });
-       self.config.broadcaster("items", node, node_obj.subscribers, item);
+       self.config.broadcaster("items", node, node_obj.subscribers, item, actor);
        return true;
 end
 
@@ -268,10 +305,11 @@ function service:retract(node, actor, id, retract)
        end
        --
        local node_obj = self.nodes[node];
-       if (not node_obj) or (not node_obj.data[id]) then
+       if (not node_obj) or (not self.data[node][id]) then
                return false, "item-not-found";
        end
-       node_obj.data[id] = nil;
+       self.events.fire_event("item-retracted", { node = node, actor = actor, id = id });
+       remove_item_by_id(self.data[node], id);
        if retract then
                self.config.broadcaster("items", node, node_obj.subscribers, retract);
        end
@@ -288,7 +326,8 @@ function service:purge(node, actor, notify)
        if not node_obj then
                return false, "item-not-found";
        end
-       node_obj.data = {}; -- Purge
+       self.data[node] = {}; -- Purge
+       self.events.fire_event("node-purged", { node = node, actor = actor });
        if notify then
                self.config.broadcaster("purge", node, node_obj.subscribers);
        end
@@ -306,9 +345,9 @@ function service:get_items(node, actor, id)
                return false, "item-not-found";
        end
        if id then -- Restrict results to a single specific item
-               return true, { [id] = node_obj.data[id] };
+               return true, { id, [id] = self.data[node][id] };
        else
-               return true, node_obj.data;
+               return true, self.data[node];
        end
 end
 
@@ -350,7 +389,7 @@ function service:get_subscriptions(node, actor, jid)
                        if node then -- Return only subscriptions to this node
                                if subscribed_nodes[node] then
                                        ret[#ret+1] = {
-                                               node = subscribed_nodes[node];
+                                               node = node;
                                                jid = jid;
                                                subscription = node_obj.subscribers[jid];
                                        };
@@ -385,4 +424,22 @@ function service:set_node_capabilities(node, actor, capabilities)
        return true;
 end
 
+function service:set_node_config(node, actor, new_config)
+       if not self:may(node, actor, "configure") then
+               return false, "forbidden";
+       end
+
+       local node_obj = self.nodes[node];
+       if not node_obj then
+               return false, "item-not-found";
+       end
+
+       for k,v in pairs(new_config) do
+               node_obj.config[k] = v;
+       end
+       trim_items(self.data[node], node_obj.config["pubsub#max_items"]);
+
+       return true;
+end
+
 return _M;