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plugins/mod_storage_memory.lua @ 10283:dff360d00dfa
net.server_epoll: Handle read size argument to link
author | Kim Alvefur <zash@zash.se> |
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date | Sun, 29 Sep 2019 15:36:23 +0200 |
parent | 10222:51f145094648 |
child | 10839:018acdaf374f |
rev | line source |
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1 local serialize = require "util.serialization".serialize; |
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2 local array = require "util.array"; |
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3 local envload = require "util.envload".envload; |
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4 local st = require "util.stanza"; |
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5 local is_stanza = st.is_stanza or function (s) return getmetatable(s) == st.stanza_mt end |
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6 local new_id = require "util.id".medium; |
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7 |
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8 local auto_purge_enabled = module:get_option_boolean("storage_memory_temporary", false); |
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9 local auto_purge_stores = module:get_option_set("storage_memory_temporary_stores", {}); |
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10 |
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11 local archive_item_limit = module:get_option_number("storage_archive_item_limit", 1000); |
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12 |
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13 local memory = setmetatable({}, { |
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14 __index = function(t, k) |
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15 local store = module:shared(k) |
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16 t[k] = store; |
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17 return store; |
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18 end |
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19 }); |
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20 |
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21 local function NULL() return nil end |
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22 |
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23 local function _purge_store(self, username) |
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24 self.store[username or NULL] = nil; |
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25 return true; |
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26 end |
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27 |
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28 local function _users(self) |
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29 return next, self.store, nil; |
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30 end |
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31 |
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32 local keyval_store = {}; |
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33 keyval_store.__index = keyval_store; |
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34 |
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35 function keyval_store:get(username) |
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36 return (self.store[username or NULL] or NULL)(); |
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37 end |
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38 |
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39 function keyval_store:set(username, data) |
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40 if data ~= nil then |
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41 data = envload("return "..serialize(data), "=(data)", {}); |
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42 end |
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43 self.store[username or NULL] = data; |
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44 return true; |
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45 end |
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46 |
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47 keyval_store.purge = _purge_store; |
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48 |
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49 keyval_store.users = _users; |
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50 |
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51 local archive_store = {}; |
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52 archive_store.__index = archive_store; |
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53 |
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54 archive_store.users = _users; |
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55 |
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56 archive_store.caps = { |
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57 total = true; |
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58 quota = archive_item_limit; |
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59 truncate = true; |
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60 }; |
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61 |
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62 function archive_store:append(username, key, value, when, with) |
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63 if is_stanza(value) then |
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64 value = st.preserialize(value); |
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65 value = envload("return xml"..serialize(value), "=(stanza)", { xml = st.deserialize }) |
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66 else |
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67 value = envload("return "..serialize(value), "=(data)", {}); |
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68 end |
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69 local a = self.store[username or NULL]; |
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70 if not a then |
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71 a = {}; |
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72 self.store[username or NULL] = a; |
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73 end |
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74 local v = { key = key, when = when, with = with, value = value }; |
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75 if not key then |
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76 key = new_id(); |
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77 v.key = key; |
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78 end |
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79 if a[key] then |
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80 table.remove(a, a[key]); |
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81 elseif #a >= archive_item_limit then |
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82 return nil, "quota-limit"; |
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83 end |
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84 local i = #a+1; |
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85 a[i] = v; |
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86 a[key] = i; |
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87 return key; |
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88 end |
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89 |
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90 function archive_store:find(username, query) |
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91 local items = self.store[username or NULL]; |
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92 if not items then |
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93 if query then |
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94 if query.before or query.after then |
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95 return nil, "item-not-found"; |
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96 end |
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97 if query.total then |
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98 return function () end, 0; |
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99 end |
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100 end |
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101 return function () end; |
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102 end |
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103 local count = nil; |
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104 local i = 0; |
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105 if query then |
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106 items = array():append(items); |
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107 if query.key then |
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108 items:filter(function (item) |
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109 return item.key == query.key; |
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110 end); |
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111 end |
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112 if query.with then |
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113 items:filter(function (item) |
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114 return item.with == query.with; |
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115 end); |
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116 end |
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117 if query.start then |
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118 items:filter(function (item) |
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119 return item.when >= query.start; |
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120 end); |
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121 end |
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122 if query["end"] then |
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123 items:filter(function (item) |
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124 return item.when <= query["end"]; |
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125 end); |
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126 end |
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127 if query.total then |
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128 count = #items; |
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129 end |
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130 if query.reverse then |
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131 items:reverse(); |
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132 if query.before then |
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133 local found = false; |
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134 for j = 1, #items do |
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135 if (items[j].key or tostring(j)) == query.before then |
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136 found = true; |
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137 i = j; |
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138 break; |
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139 end |
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140 end |
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141 if not found then |
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142 return nil, "item-not-found"; |
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143 end |
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144 end |
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145 elseif query.after then |
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146 local found = false; |
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147 for j = 1, #items do |
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148 if (items[j].key or tostring(j)) == query.after then |
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149 found = true; |
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150 i = j; |
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151 break; |
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152 end |
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153 end |
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154 if not found then |
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155 return nil, "item-not-found"; |
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156 end |
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157 end |
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158 if query.limit and #items - i > query.limit then |
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159 items[i+query.limit+1] = nil; |
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160 end |
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161 end |
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162 return function () |
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163 i = i + 1; |
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164 local item = items[i]; |
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165 if not item then return; end |
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166 return item.key, item.value(), item.when, item.with; |
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167 end, count; |
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168 end |
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|
169 |
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170 function archive_store:summary(username, query) |
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171 local iter, err = self:find(username, query) |
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172 if not iter then return iter, err; end |
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173 local counts = {}; |
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174 local earliest = {}; |
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175 local latest = {}; |
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|
176 for _, _, when, with in iter do |
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177 counts[with] = (counts[with] or 0) + 1; |
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178 if earliest[with] == nil then |
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|
179 earliest[with] = when; |
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180 end |
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181 latest[with] = when; |
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182 end |
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183 return { |
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184 counts = counts; |
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185 earliest = earliest; |
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186 latest = latest; |
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187 }; |
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188 end |
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189 |
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190 |
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191 function archive_store:delete(username, query) |
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192 if not query or next(query) == nil then |
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193 self.store[username or NULL] = nil; |
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194 return true; |
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195 end |
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196 local items = self.store[username or NULL]; |
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197 if not items then |
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198 -- Store is empty |
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199 return 0; |
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200 end |
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201 items = array(items); |
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202 local count_before = #items; |
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203 if query then |
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204 if query.key then |
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205 items:filter(function (item) |
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206 return item.key ~= query.key; |
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207 end); |
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|
208 end |
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209 if query.with then |
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|
210 items:filter(function (item) |
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211 return item.with ~= query.with; |
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212 end); |
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213 end |
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214 if query.start then |
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215 items:filter(function (item) |
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216 return item.when < query.start; |
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217 end); |
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218 end |
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219 if query["end"] then |
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220 items:filter(function (item) |
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|
221 return item.when > query["end"]; |
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222 end); |
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223 end |
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224 if query.truncate and #items > query.truncate then |
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225 if query.reverse then |
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226 -- Before: { 1, 2, 3, 4, 5, } |
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227 -- After: { 1, 2, 3 } |
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228 for i = #items, query.truncate + 1, -1 do |
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229 items[i] = nil; |
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230 end |
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231 else |
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232 -- Before: { 1, 2, 3, 4, 5, } |
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233 -- After: { 3, 4, 5 } |
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234 local offset = #items - query.truncate; |
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235 for i = 1, #items do |
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236 items[i] = items[i+offset]; |
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237 end |
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238 end |
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239 end |
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240 end |
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241 local count = count_before - #items; |
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242 if count == 0 then |
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243 return 0; -- No changes, skip write |
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244 end |
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245 setmetatable(items, nil); |
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246 |
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247 do -- re-index by key |
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248 for k in pairs(items) do |
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249 if type(k) == "string" then |
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250 items[k] = nil; |
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251 end |
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252 end |
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253 |
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254 for i = 1, #items do |
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255 items[ items[i].key ] = i; |
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256 end |
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257 end |
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258 |
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259 return count; |
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260 end |
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261 |
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262 archive_store.purge = _purge_store; |
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263 |
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264 local stores = { |
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265 keyval = keyval_store; |
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266 archive = archive_store; |
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267 } |
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268 |
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269 local driver = {}; |
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270 |
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271 function driver:open(store, typ) -- luacheck: ignore 212/self |
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272 local store_mt = stores[typ or "keyval"]; |
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273 if store_mt then |
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274 return setmetatable({ store = memory[store] }, store_mt); |
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275 end |
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276 return nil, "unsupported-store"; |
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277 end |
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278 |
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279 function driver:purge(user) -- luacheck: ignore 212/self |
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280 for _, store in pairs(memory) do |
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281 store[user] = nil; |
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282 end |
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283 end |
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284 |
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285 if auto_purge_enabled then |
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286 module:hook("resource-unbind", function (event) |
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287 local user_bare_jid = event.session.username.."@"..event.session.host; |
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288 if not prosody.bare_sessions[user_bare_jid] then -- User went offline |
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289 module:log("debug", "Clearing store for offline user %s", user_bare_jid); |
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290 local f, s, v; |
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291 if auto_purge_stores:empty() then |
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292 f, s, v = pairs(memory); |
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293 else |
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294 f, s, v = auto_purge_stores:items(); |
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295 end |
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296 |
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297 for store_name in f, s, v do |
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298 if memory[store_name] then |
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299 memory[store_name][event.session.username] = nil; |
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300 end |
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301 end |
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302 end |
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303 end); |
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304 end |
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305 |
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306 module:provides("storage", driver); |