utils.js
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var util = require("util")
, DataTypes = require("./data-types")
, SqlString = require("./sql-string")
var Utils = module.exports = {
_: (function() {
var _ = require("lodash")
, _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, tickChar) {
tickChar = tickChar || Utils.TICK_CHAR
return tickChar + Utils.removeTicks(s, tickChar) + tickChar
},
removeTicks: function(s, tickChar) {
tickChar = tickChar || Utils.TICK_CHAR
return s.replace(new RegExp(tickChar, 'g'), "")
},
escape: function(s) {
return SqlString.escape(s, true, "local").replace(/\\"/g, '"')
},
format: function(arr, dialect) {
var timeZone = null;
return SqlString.format(arr.shift(), arr, timeZone, dialect)
},
isHash: function(obj) {
return Utils._.isObject(obj) && !Array.isArray(obj);
},
pad: function (s) {
return s < 10 ? '0' + s : s
},
toSqlDate: function(date) {
return date.getUTCFullYear() + '-' +
this.pad(date.getUTCMonth()+1) + '-' +
this.pad(date.getUTCDate()) + ' ' +
this.pad(date.getUTCHours()) + ':' +
this.pad(date.getUTCMinutes()) + ':' +
this.pad(date.getUTCSeconds())
},
argsArePrimaryKeys: function(args, primaryKeys) {
var result = (args.length == Object.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) ? Utils.now() : 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
}
},
firstValueOfHash: function(obj) {
for (var key in obj) {
if (obj.hasOwnProperty(key))
return obj[key]
}
return null
},
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;
},
now: function() {
var now = new Date()
now.setMilliseconds(0)
return now
}
}
Utils.CustomEventEmitter = require("./emitters/custom-event-emitter")
Utils.QueryChainer = require("./query-chainer")
Utils.Lingo = require("lingo")