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{\r\n\r\n    initialData: {\r\n        data: []\r\n    },\r\n\r\n    attributes: {\r\n        session: {\r\n            type: Boolean,\r\n            default: false\r\n        },\r\n\r\n        columns: {\r\n            type: Object,\r\n            default: {}\r\n        }\r\n    },\r\n\r\n    methods: {\r\n        insert: function(data) {\r\n            this._insert(data);\r\n            this._store();\r\n        },\r\n\r\n        update: function(filter, data) {\r\n            this._update(filter, data);\r\n            this._store();\r\n        },\r\n\r\n        upsert: function(filter, data) {\r\n            var toUpdate = this._filter(filter);\r\n            if (toUpdate.length) {\r\n                this._update(filter, data);\r\n            } else {\r\n                this._insert(data);\r\n            }\r\n            this._store();\r\n        },\r\n\r\n        delete: function(filter) {\r\n            this._delete(filter);\r\n            this._store();\r\n        },\r\n\r\n        clear: function() {\r\n            this.records = [];\r\n            this.lastid = 0;\r\n            this._store();\r\n        },\r\n\r\n        get: function(filter) {\r\n            return this._filter(filter);\r\n        }\r\n    },\r\n\r\n    events: {\r\n        inserted: Event,\r\n        updated: Event,\r\n        deleted: Event\r\n    },\r\n\r\n    render: function(node) {\r\n        this.store = window[this.props.session ? 'sessionStorage' : 'localStorage'];\r\n        this.records = [];\r\n        this.lastid = 0;\r\n\r\n        this._read = this._read.bind(this);\r\n\r\n        if (!this.props.session) {\r\n            window.addEventListener('storage', this._read);\r\n        }\r\n        \r\n        this._read();\r\n    },\r\n\r\n    update: function(props, fields) {\r\n        if (fields.has('columns')) {\r\n            this._setData();\r\n        }\r\n    },\r\n\r\n    _read: function() {\r\n        try {\r\n            var stored = this.store.getItem('datastore_' + this.name);\r\n\r\n            if (stored) {\r\n                stored = JSON.parse(stored);\r\n                if (stored.records) this.records = stored.records;\r\n                if (stored.lastid) this.lastid = stored.lastid;\r\n            }\r\n        } catch(err) {\r\n            console.warn('Error parsing datastore', err);\r\n        }\r\n\r\n        this._setData();\r\n    },\r\n\r\n    _filter: function(filter) {\r\n        if (typeof filter == 'number') filter = { $id: filter };\r\n\r\n        return this.records.filter((record) => {\r\n            if (Array.isArray(filter)) {\r\n                for (var i = 0; i < filter.length; i++) {\r\n                    for (var prop in filter[i]) {\r\n                        if (!filter[i].hasOwnProperty(prop)) continue;\r\n                        if (record[prop] === filter[i][prop]) {\r\n                            return true;\r\n                        }\r\n                    }\r\n                }\r\n            } else {\r\n                for (var prop in filter) {\r\n                    if (!filter.hasOwnProperty(prop)) continue;\r\n                    if (record[prop] === filter[prop]) {\r\n                        return true;\r\n                    }\r\n                }\r\n            }\r\n\r\n            return false;\r\n        });\r\n    },\r\n\r\n    _parseData: function(data) {\r\n        if (typeof data == 'object' && !Array.isArray(data)) {\r\n            return true;\r\n        }\r\n\r\n        return false;\r\n    },\r\n\r\n    _mergeData: function(record, data) {\r\n        var merged = Object.assign({}, record);\r\n        \r\n        for (var prop in data) {\r\n            if (!data.hasOwnProperty(prop)) continue;\r\n\r\n            var value = data[prop];\r\n\r\n            if (this._isExpression(value)) {\r\n                value = dmx.parse(value, new dmx.DataScope(record, this));\r\n            }\r\n\r\n            merged[prop] = value;\r\n        }\r\n\r\n        return merged;\r\n    },\r\n\r\n    _insert: function(data) {\r\n        var result = { inserted: [], deleted: [] };\r\n\r\n        if (Array.isArray(data)) {\r\n            for (var i = 0; i < data.length; i++) {\r\n                var record = this._mergeData({ $id: ++this.lastid }, data[i]);\r\n                this.records.push(record);\r\n                result.inserted.push(record);\r\n            }\r\n        } else {\r\n            var record = this._mergeData({ $id: ++this.lastid }, data);\r\n            this.records.push(record);\r\n            result.inserted.push(record);\r\n        }\r\n\r\n        this.dispatchEvent('inserted', null, result);\r\n    },\r\n\r\n    _update: function(filter, data) {\r\n        if (!this._parseData(data)) {\r\n            console.warn('Invalid data!', data);\r\n            return;\r\n        }\r\n\r\n        var result = { inserted: [], deleted: [] };\r\n        \r\n        this._filter(filter).forEach((record) => {\r\n            var newRecord = this._mergeData(record, data);\r\n            if (!dmx.equal(record, newRecord)) {\r\n                result.deleted.push(dmx.clone(record));\r\n                result.inserted.push(dmx.clone(newRecord));\r\n                Object.assign(record, newRecord);\r\n            }\r\n        });\r\n\r\n        this.dispatchEvent('updated', null, result);\r\n    },\r\n\r\n    _delete: function(filter) {\r\n        if (typeof filter == 'number') filter = { $id: filter };\r\n\r\n        var result = { inserted: [], deleted: [] };\r\n\r\n        this.records = this.records.filter(function(record) {\r\n            for (var prop in filter) {\r\n                if (!filter.hasOwnProperty(prop)) continue;\r\n                if (record[prop] === filter[prop]) {\r\n                    result.deleted.push(dmx.clone(record));\r\n                    return false;\r\n                }\r\n            }\r\n\r\n            return true;\r\n        });\r\n\r\n        this.dispatchEvent('deleted', null, result);\r\n    },\r\n\r\n    _store: function() {\r\n        var data = JSON.stringify({\r\n            records: this.records,\r\n            lastid: this.lastid\r\n        });\r\n\r\n        if (data !== this.store.getItem('datastore_' + this.name)) {\r\n            this.store.setItem('datastore_' + this.name, data);\r\n            this._setData();\r\n        }\r\n    },\r\n\r\n    _setData: function() {\r\n        if (typeof this.props.columns == 'object') {\r\n            this.set('data', this.records.map((record, i) => {\r\n                const result = dmx.clone(record);\r\n                const scope = dmx.DataScope({\r\n                    $value: record,\r\n                    $index: i,\r\n                    $key: i,\r\n                    ...record\r\n                });\r\n\r\n                for (let column in this.props.columns) {\r\n                    if (!this.props.columns.hasOwnProperty(column)) continue;\r\n                    let value = this.props.columns[column];\r\n                    if (this._isExpression(value)) {\r\n                        value = dmx.parse(value, scope);\r\n                    }\r\n                    result[column] = value;\r\n                }\r\n\r\n                return result;\r\n            }));\r\n        } else {\r\n            this.set('data', this.records);\r\n        }\r\n    },\r\n\r\n    _isExpression: function(value) {\r\n        return typeof value == 'string' && value.includes('{{');\r\n    }\r\n\r\n});\r\n"]}