128 lines
2.9 KiB
JavaScript
128 lines
2.9 KiB
JavaScript
// UUID
|
|
// https://gist.github.com/LeverOne/1308368
|
|
/* jshint ignore:start */
|
|
function uuid (a, b) { for (b = a = ''; a++ < 36; b += a * 51 & 52 ? (a ^ 15 ? 8 ^ Math.random() * (a ^ 20 ? 16 : 4) : 4).toString(16) : '-');return b }
|
|
/* jshint ignore:end */
|
|
|
|
module.exports = {
|
|
// Empties properties
|
|
__empty: function (doc) {
|
|
this.forEach(doc, function (value, key) {
|
|
delete doc[key]
|
|
})
|
|
},
|
|
|
|
// Copies properties from an object to another
|
|
__update: function (dest, src) {
|
|
this.forEach(src, function (value, key) {
|
|
dest[key] = value
|
|
})
|
|
},
|
|
|
|
// Removes an item from an array
|
|
__remove: function (array, item) {
|
|
var index = this.indexOf(array, item)
|
|
if (index !== -1) array.splice(index, 1)
|
|
},
|
|
|
|
__id: function () {
|
|
var id = this.id || 'id'
|
|
return id
|
|
},
|
|
|
|
getById: function (collection, id) {
|
|
var self = this
|
|
return this.find(collection, function (doc) {
|
|
if (self.has(doc, self.__id())) {
|
|
return doc[self.__id()].toString() === id.toString()
|
|
}
|
|
})
|
|
},
|
|
|
|
createId: function (collection, doc) {
|
|
return uuid()
|
|
},
|
|
|
|
insert: function (collection, doc) {
|
|
doc[this.__id()] = doc[this.__id()] || this.createId(collection, doc)
|
|
var d = this.getById(collection, doc[this.__id()])
|
|
if (d) throw new Error('Insert failed, duplicate id')
|
|
collection.push(doc)
|
|
return doc
|
|
},
|
|
|
|
upsert: function (collection, doc) {
|
|
if (doc[this.__id()]) {
|
|
// id is set
|
|
var d = this.getById(collection, doc[this.__id()])
|
|
if (d) {
|
|
// replace properties of existing object
|
|
this.__empty(d)
|
|
this.assign(d, doc)
|
|
} else {
|
|
// push new object
|
|
collection.push(doc)
|
|
}
|
|
} else {
|
|
// create id and push new object
|
|
doc[this.__id()] = this.createId(collection, doc)
|
|
collection.push(doc)
|
|
}
|
|
|
|
return doc
|
|
},
|
|
|
|
updateById: function (collection, id, attrs) {
|
|
var doc = this.getById(collection, id)
|
|
|
|
if (doc) {
|
|
this.assign(doc, attrs, {[this.__id()]: doc[this.__id()]})
|
|
}
|
|
|
|
return doc
|
|
},
|
|
|
|
updateWhere: function (collection, predicate, attrs) {
|
|
var self = this
|
|
var docs = this.filter(collection, predicate)
|
|
var key = this.__id()
|
|
|
|
docs.forEach(function (doc) {
|
|
self.assign(doc, attrs, {[key]: doc[key]})
|
|
})
|
|
|
|
return docs
|
|
},
|
|
|
|
replaceById: function (collection, id, attrs) {
|
|
var doc = this.getById(collection, id)
|
|
|
|
if (doc) {
|
|
var docId = doc[this.__id()]
|
|
this.__empty(doc)
|
|
this.assign(doc, attrs, {[this.__id()]: docId})
|
|
}
|
|
|
|
return doc
|
|
},
|
|
|
|
removeById: function (collection, id) {
|
|
var doc = this.getById(collection, id)
|
|
|
|
this.__remove(collection, doc)
|
|
|
|
return doc
|
|
},
|
|
|
|
removeWhere: function (collection, predicate) {
|
|
var self = this
|
|
var docs = this.filter(collection, predicate)
|
|
|
|
docs.forEach(function (doc) {
|
|
self.__remove(collection, doc)
|
|
})
|
|
|
|
return docs
|
|
}
|
|
}
|