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configfile.js
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configfile.js
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// Config file loader
var fs = require('fs');
// for "ini" type files
var regex = {
section: /^\s*\[\s*([^\]]*)\s*\]\s*$/,
param: /^\s*(\w+)\s*=\s*(.*)\s*$/,
comment: /^\s*[;#].*$/,
line: /^\s*(.*)\s*$/,
blank: /^\s*$/
};
var cfreader = exports;
cfreader.watch_files = true;
cfreader._config_cache = {};
cfreader.read_config = function(name, type) {
// Check cache first
if (cfreader._config_cache[name]) {
return cfreader._config_cache[name];
}
// load config file
var result = cfreader.load_config(name, type);
if (cfreader.watch_files) {
fs.unwatchFile(name);
fs.watchFile(name, function (curr, prev) {
// file has changed
if (curr.mtime.getTime() !== prev.mtime.getTime()) {
cfreader.load_config(name, type);
}
});
}
return result;
}
cfreader.empty_config = function(type) {
if (type === 'ini') {
return { main: {} };
}
else {
return [];
}
};
cfreader.load_config = function(name, type) {
if (type === 'ini') {
result = cfreader.load_ini_config(name);
}
else {
result = cfreader.load_flat_config(name);
if (result && type !== 'list') {
result = result[0];
if (/^\d+$/.test(result)) {
result = parseInt(result);
}
}
}
cfreader._config_cache[name] = result;
return result;
};
cfreader.load_ini_config = function(name) {
var result = cfreader.empty_config('ini');
var current_sect = result.main;
var data = new String(fs.readFileSync(name));
var lines = data.split(/\r\n|\r|\n/);
var match;
lines.forEach( function(line) {
if (regex.comment.test(line)) {
return;
}
else if (regex.blank.test(line)) {
return;
}
else if (match = regex.param.exec(line)) {
if (/^\d+$/.test(match[2])) {
current_sect[match[1]] = parseInt(match[2]);
}
else {
current_sect[match[1]] = match[2];
}
}
else if (match = regex.section.exec(line)) {
current_sect = result[match[1]] = {};
}
else {
// error ?
};
});
return result;
};
cfreader.load_flat_config = function(name) {
var result = [];
var data = new String(fs.readFileSync(name));
var lines = data.split(/\r\n|\r|\n/);
lines.forEach( function(line) {
var line_data;
if (regex.comment.test(line)) {
return;
}
else if (regex.blank.test(line)) {
return;
}
else if (line_data = regex.line.exec(line)) {
result.push(line_data[1]);
}
});
return result;
};