aboutsummaryrefslogtreecommitdiffstats
path: root/plugins/mod_storage_internal.lua
blob: c87d01bec6055bc0b559332966cdc3bfc019ab1b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
local cache = require "util.cache";
local datamanager = require "core.storagemanager".olddm;
local array = require "util.array";
local datetime = require "util.datetime";
local st = require "util.stanza";
local now = require "util.time".now;
local id = require "util.id".medium;
local jid_join = require "util.jid".join;

local host = module.host;

local archive_item_limit = module:get_option_number("storage_archive_item_limit", 10000);
local archive_item_count_cache = cache.new(module:get_option("storage_archive_item_limit_cache_size", 1000));

local driver = {};

function driver:open(store, typ)
	local mt = self[typ or "keyval"]
	if not mt then
		return nil, "unsupported-store";
	end
	return setmetatable({ store = store, type = typ }, mt);
end

function driver:stores(username) -- luacheck: ignore 212/self
	return datamanager.stores(username, host);
end

function driver:purge(user) -- luacheck: ignore 212/self
	return datamanager.purge(user, host);
end

local keyval = { };
driver.keyval = { __index = keyval };

function keyval:get(user)
	return datamanager.load(user, host, self.store);
end

function keyval:set(user, data)
	return datamanager.store(user, host, self.store, data);
end

function keyval:users()
	return datamanager.users(host, self.store, self.type);
end

local archive = {};
driver.archive = { __index = archive };

archive.caps = {
	total = true;
	quota = archive_item_limit;
	truncate = true;
};

function archive:append(username, key, value, when, with)
	when = when or now();
	if not st.is_stanza(value) then
		return nil, "unsupported-datatype";
	end
	value = st.preserialize(st.clone(value));
	value.when = when;
	value.with = with;
	value.attr.stamp = datetime.datetime(when);
	value.attr.stamp_legacy = datetime.legacy(when);

	local cache_key = jid_join(username, host, self.store);
	local item_count = archive_item_count_cache:get(cache_key);

	if key then
		local items, err = datamanager.list_load(username, host, self.store);
		if not items and err then return items, err; end

		-- Check the quota
		item_count = items and #items or 0;
		archive_item_count_cache:set(cache_key, item_count);
		if item_count >= archive_item_limit then
			module:log("debug", "%s reached or over quota, not adding to store", username);
			return nil, "quota-limit";
		end

		if items then
			-- Filter out any item with the same key as the one being added
			items = array(items);
			items:filter(function (item)
				return item.key ~= key;
			end);

			value.key = key;
			items:push(value);
			local ok, err = datamanager.list_store(username, host, self.store, items);
			if not ok then return ok, err; end
			archive_item_count_cache:set(cache_key, #items);
			return key;
		end
	else
		if not item_count then -- Item count not cached?
			-- We need to load the list to get the number of items currently stored
			local items, err = datamanager.list_load(username, host, self.store);
			if not items and err then return items, err; end
			item_count = items and #items or 0;
			archive_item_count_cache:set(cache_key, item_count);
		end
		if item_count >= archive_item_limit then
			module:log("debug", "%s reached or over quota, not adding to store", username);
			return nil, "quota-limit";
		end
		key = id();
	end

	module:log("debug", "%s has %d items out of %d limit in store %s", username, item_count, archive_item_limit, self.store);

	value.key = key;

	local ok, err = datamanager.list_append(username, host, self.store, value);
	if not ok then return ok, err; end
	archive_item_count_cache:set(cache_key, item_count+1);
	return key;
end

function archive:find(username, query)
	local items, err = datamanager.list_load(username, host, self.store);
	if not items then
		if err then
			return items, err;
		else
			return function () end, 0;
		end
	end
	local count = #items;
	local i = 0;
	if query then
		items = array(items);
		if query.key then
			items:filter(function (item)
				return item.key == query.key;
			end);
		end
		if query.with then
			items:filter(function (item)
				return item.with == query.with;
			end);
		end
		if query.start then
			items:filter(function (item)
				return item.when >= query.start;
			end);
		end
		if query["end"] then
			items:filter(function (item)
				return item.when <= query["end"];
			end);
		end
		count = #items;
		if query.reverse then
			items:reverse();
			if query.before then
				for j = 1, count do
					if (items[j].key or tostring(j)) == query.before then
						i = j;
						break;
					end
				end
			end
		elseif query.after then
			for j = 1, count do
				if (items[j].key or tostring(j)) == query.after then
					i = j;
					break;
				end
			end
		end
		if query.limit and #items - i > query.limit then
			items[i+query.limit+1] = nil;
		end
	end
	return function ()
		i = i + 1;
		local item = items[i];
		if not item then return; end
		local key = item.key or tostring(i);
		local when = item.when or datetime.parse(item.attr.stamp);
		local with = item.with;
		item.key, item.when, item.with = nil, nil, nil;
		item.attr.stamp = nil;
		item.attr.stamp_legacy = nil;
		item = st.deserialize(item);
		return key, item, when, with;
	end, count;
end

function archive:dates(username)
	local items, err = datamanager.list_load(username, host, self.store);
	if not items then return items, err; end
	return array(items):pluck("when"):map(datetime.date):unique();
end

function archive:delete(username, query)
	local cache_key = jid_join(username, host, self.store);
	if not query or next(query) == nil then
		archive_item_count_cache:set(cache_key, nil);
		return datamanager.list_store(username, host, self.store, nil);
	end
	local items, err = datamanager.list_load(username, host, self.store);
	if not items then
		if err then
			return items, err;
		end
		archive_item_count_cache:set(cache_key, 0);
		-- Store is empty
		return 0;
	end
	items = array(items);
	local count_before = #items;
	if query then
		if query.key then
			items:filter(function (item)
				return item.key ~= query.key;
			end);
		end
		if query.with then
			items:filter(function (item)
				return item.with ~= query.with;
			end);
		end
		if query.start then
			items:filter(function (item)
				return item.when < query.start;
			end);
		end
		if query["end"] then
			items:filter(function (item)
				return item.when > query["end"];
			end);
		end
		if query.truncate and #items > query.truncate then
			if query.reverse then
				-- Before: { 1, 2, 3, 4, 5, }
				-- After: { 1, 2, 3 }
				for i = #items, query.truncate + 1, -1 do
					items[i] = nil;
				end
			else
				-- Before: { 1, 2, 3, 4, 5, }
				-- After: { 3, 4, 5 }
				local offset = #items - query.truncate;
				for i = 1, #items do
					items[i] = items[i+offset];
				end
			end
		end
	end
	local count = count_before - #items;
	if count == 0 then
		return 0; -- No changes, skip write
	end
	local ok, err = datamanager.list_store(username, host, self.store, items);
	if not ok then return ok, err; end
	archive_item_count_cache:set(cache_key, #items);
	return count;
end

module:provides("storage", driver);