utils.js
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var mysql = require("mysql")
, connection = mysql.createConnection({})
, util = require("util")
, DataTypes = require("./data-types")
var Utils = module.exports = {
_: (function() {
var _ = require("underscore")
, _s = require('underscore.string')
_.mixin(_s.exports())
_.mixin({
includes: _s.include,
camelizeIf: function(string, condition) {
var result = string
if(condition) {
result = _.camelize(string)
}
return result
},
underscoredIf: function(string, condition) {
var result = string
if(condition) {
result = _.underscored(string)
}
return result
}
})
return _
})(),
addEventEmitter: function(_class) {
util.inherits(_class, require('events').EventEmitter)
},
TICK_CHAR: '`',
addTicks: function(s) {
return Utils.TICK_CHAR + Utils.removeTicks(s) + Utils.TICK_CHAR
},
removeTicks: function(s) {
return s.replace(new RegExp(Utils.TICK_CHAR, 'g'), "")
},
escape: function(s) {
return connection.escape(s).replace(/\\"/g, '"')
},
format: function(arr) {
var query = arr[0]
, replacements = Utils._.compact(arr.map(function(obj) { return obj != query ? obj : null}))
return connection.format.apply(connection, [query, replacements])
},
isHash: function(obj) {
return Utils._.isObject(obj) && !Utils._.isArray(obj);
},
toSqlDate: function(date) {
return [
[
date.getFullYear(),
((date.getMonth() < 9 ? '0' : '') + (date.getMonth()+1)),
((date.getDate() < 10 ? '0' : '') + date.getDate())
].join("-"),
date.toLocaleTimeString()
].join(" ")
},
argsArePrimaryKeys: function(args, primaryKeys) {
var result = (args.length == Utils._.keys(primaryKeys).length)
if (result) {
Utils._.each(args, function(arg) {
if(result) {
if(['number', 'string'].indexOf(typeof arg) !== -1)
result = true
else
result = (arg instanceof Date)
}
})
}
return result
},
combineTableNames: function(tableName1, tableName2) {
return (tableName1.toLowerCase() < tableName2.toLowerCase()) ? (tableName1 + tableName2) : (tableName2 + tableName1)
},
singularize: function(s) {
return Utils.Lingo.en.isSingular(s) ? s : Utils.Lingo.en.singularize(s)
},
pluralize: function(s) {
return Utils.Lingo.en.isPlural(s) ? s : Utils.Lingo.en.pluralize(s)
},
removeCommentsFromFunctionString: function(s) {
s = s.replace(/\s*(\/\/.*)/g, '')
s = s.replace(/(\/\*[\n\r\s\S]*?\*\/)/mg, '')
return s
},
toDefaultValue: function(value) {
return (value == DataTypes.NOW) ? new Date() : value
},
setAttributes: function(hash, identifier, instance, prefix) {
prefix = prefix || ''
if (this.isHash(identifier)) {
this._.each(identifier, function(elem, key) {
hash[prefix + key] = Utils._.isString(instance) ? instance : Utils._.isObject(instance) ? instance[elem.key || elem] : null
})
} else {
hash[prefix + identifier] = Utils._.isString(instance) ? instance : Utils._.isObject(instance) ? instance.id : null
}
return hash
},
removeNullValuesFromHash: function(hash, omitNull) {
var result = hash
if(omitNull) {
var _hash = {}
Utils._.each(hash, function(val, key) {
if (key.match(/Id$/) || ((val !== null) && (val !== undefined))) {
_hash[key] = val;
}
})
result = _hash
}
return result
},
prependTableNameToHash: function(tableName, hash) {
if (tableName) {
var _hash = {}
for (var key in hash) {
if (key.indexOf('.') === -1) {
_hash[tableName + '.' + key] = hash[key]
} else {
_hash[key] = hash[key]
}
}
return _hash
} else {
return hash
}
},
inherit: function(subClass, superClass) {
if (superClass.constructor == Function) {
// Normal Inheritance
subClass.prototype = new superClass();
subClass.prototype.constructor = subClass;
subClass.prototype.parent = superClass.prototype;
} else {
// Pure Virtual Inheritance
subClass.prototype = superClass;
subClass.prototype.constructor = subClass;
subClass.prototype.parent = superClass;
}
return subClass;
}
}
Utils.CustomEventEmitter = require("./emitters/custom-event-emitter")
Utils.QueryChainer = require("./query-chainer")
Utils.Lingo = require("lingo")