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Log how many queued stanzas we send
0 | 1 | local format = string.format; |
2 | local setmetatable, type = setmetatable, type; | |
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3 | local pairs, ipairs = pairs, ipairs; |
0 | 4 | local char = string.char; |
5 | local loadfile, setfenv, pcall = loadfile, setfenv, pcall; | |
6 | local log = log; | |
7 | local io_open = io.open; | |
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8 | local os_remove = os.remove; |
267 | 9 | local tostring, tonumber = tostring, tonumber; |
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10 | local error = error; |
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11 | local next = next; |
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12 | local t_insert = table.insert; |
0 | 13 | |
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14 | local indent = function(f, i) |
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15 | for n = 1, i do |
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16 | f:write("\t"); |
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17 | end |
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18 | end |
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19 | |
0 | 20 | module "datamanager" |
21 | ||
22 | ||
23 | ---- utils ----- | |
24 | local encode, decode; | |
25 | ||
26 | local log = function (type, msg) return log(type, "datamanager", msg); end | |
27 | ||
28 | do | |
29 | local urlcodes = setmetatable({}, { __index = function (t, k) t[k] = char(tonumber("0x"..k)); return t[k]; end }); | |
30 | ||
31 | decode = function (s) | |
32 | return s and (s:gsub("+", " "):gsub("%%([a-fA-F0-9][a-fA-F0-9])", urlcodes)); | |
33 | end | |
34 | ||
35 | encode = function (s) | |
36 | return s and (s:gsub("%W", function (c) return format("%%%x", c:byte()); end)); | |
37 | end | |
38 | end | |
39 | ||
40 | local function basicSerialize (o) | |
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41 | if type(o) == "number" or type(o) == "boolean" then |
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42 | return tostring(o); |
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43 | else -- assume it is a string -- FIXME make sure it's a string. throw an error otherwise. |
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44 | return (format("%q", tostring(o)):gsub("\\\n", "\\n")); |
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45 | end |
0 | 46 | end |
47 | ||
48 | ||
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49 | local function simplesave (f, o, ind) |
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50 | if type(o) == "number" then |
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51 | f:write(o) |
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52 | elseif type(o) == "string" then |
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53 | f:write((format("%q", o):gsub("\\\n", "\\n"))) |
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54 | elseif type(o) == "table" then |
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55 | f:write("{\n") |
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56 | for k,v in pairs(o) do |
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57 | indent(f, ind); |
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58 | f:write("[", basicSerialize(k), "] = ") |
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59 | simplesave(f, v, ind+1) |
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60 | f:write(",\n") |
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61 | end |
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62 | indent(f, ind-1); |
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63 | f:write("}") |
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64 | elseif type(o) == "boolean" then |
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65 | f:write(o and "true" or "false"); |
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66 | else |
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67 | error("cannot serialize a " .. type(o)) |
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68 | end |
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69 | end |
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70 | |
0 | 71 | ------- API ------------- |
72 | ||
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73 | function getpath(username, host, datastore, ext) |
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74 | ext = ext or "dat"; |
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75 | if username then |
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76 | return format("data/%s/%s/%s.%s", encode(host), datastore, encode(username), ext); |
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77 | elseif host then |
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78 | return format("data/%s/%s.%s", encode(host), datastore, ext); |
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79 | else |
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80 | return format("data/%s.%s", datastore, ext); |
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81 | end |
0 | 82 | end |
83 | ||
84 | function load(username, host, datastore) | |
85 | local data, ret = loadfile(getpath(username, host, datastore)); | |
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86 | if not data then |
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87 | log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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88 | return nil; |
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89 | end |
0 | 90 | setfenv(data, {}); |
91 | local success, ret = pcall(data); | |
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92 | if not success then |
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93 | log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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94 | return nil; |
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95 | end |
0 | 96 | return ret; |
97 | end | |
98 | ||
99 | function store(username, host, datastore, data) | |
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100 | if not data then |
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101 | data = {}; |
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102 | end |
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103 | -- save the datastore |
0 | 104 | local f, msg = io_open(getpath(username, host, datastore), "w+"); |
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105 | if not f then |
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106 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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107 | return; |
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108 | end |
0 | 109 | f:write("return "); |
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110 | simplesave(f, data, 1); |
0 | 111 | f:close(); |
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112 | if not next(data) then -- try to delete empty datastore |
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113 | os_remove(getpath(username, host, datastore)); |
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114 | end |
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115 | -- we write data even when we are deleting because lua doesn't have a |
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116 | -- platform independent way of checking for non-exisitng files |
0 | 117 | return true; |
118 | end | |
119 | ||
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120 | function list_append(username, host, datastore, data) |
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121 | if not data then return; end |
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122 | -- save the datastore |
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123 | local f, msg = io_open(getpath(username, host, datastore, "list"), "a+"); |
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124 | if not f then |
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125 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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126 | return; |
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127 | end |
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128 | f:write("item("); |
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129 | simplesave(f, data, 1); |
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130 | f:write(");\n"); |
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131 | f:close(); |
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132 | return true; |
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133 | end |
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134 | |
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135 | function list_store(username, host, datastore, data) |
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136 | if not data then |
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137 | data = {}; |
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138 | end |
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139 | -- save the datastore |
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140 | local f, msg = io_open(getpath(username, host, datastore, "list"), "w+"); |
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141 | if not f then |
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142 | log("error", "Unable to write to "..datastore.." storage ('"..msg.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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143 | return; |
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144 | end |
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145 | for _, d in ipairs(data) do |
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146 | f:write("item("); |
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147 | simplesave(f, d, 1); |
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148 | f:write(");\n"); |
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149 | end |
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150 | f:close(); |
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151 | if not next(data) then -- try to delete empty datastore |
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152 | os_remove(getpath(username, host, datastore, "list")); |
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153 | end |
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154 | -- we write data even when we are deleting because lua doesn't have a |
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155 | -- platform independent way of checking for non-exisitng files |
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156 | return true; |
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157 | end |
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158 | |
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159 | function list_load(username, host, datastore) |
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160 | local data, ret = loadfile(getpath(username, host, datastore, "list")); |
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161 | if not data then |
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162 | log("warn", "Failed to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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163 | return nil; |
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164 | end |
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165 | local items = {}; |
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166 | setfenv(data, {item = function(i) t_insert(items, i); end}); |
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167 | local success, ret = pcall(data); |
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168 | if not success then |
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169 | log("error", "Unable to load "..datastore.." storage ('"..ret.."') for user: "..(username or "nil").."@"..(host or "nil")); |
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170 | return nil; |
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171 | end |
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172 | return items; |
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173 | end |
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174 | |
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175 | return _M; |