123 lines
2.3 KiB
JavaScript
123 lines
2.3 KiB
JavaScript
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var Lot = require('./lot');
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var LotIface = require('./lot-iface');
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var Spec = require('./spec');
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var Value = require('./value');
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module.exports = new Class({
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Extends: Lot
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,Tag: 'vn-lot-query'
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,Properties: {
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fields: {
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type: Array
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,set: function(x) {
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this._fields = x;
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this._onSourceChange();
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}
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,get: function() {
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return this._fields;
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}
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},
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source: {
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type: LotIface
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,set: function(x) {
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this.link({_source: x}, {change: this._onSourceChange});
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this._onSourceChange();
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}
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,get: function() {
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return this._source;
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}
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}
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}
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,initialize: function(props) {
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Object.assign(this, {
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_fields: null,
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_source: null,
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_lockSource: false,
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_specs: {}
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});
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Lot.prototype.initialize.call(this, props);
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}
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,appendChild: function(child) {
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if (!(child instanceof Spec))
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throw new Error('VnLotQuery: Child must be a Vn.Spec instance');
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this._specs[child.name] = child;
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this._onSourceChange();
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}
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,_onSourceChange: function() {
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if (this._lockSource)
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return;
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var params = this._source ? this._source.params : {};
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var myParams = {};
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for (var key in this._specs)
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myParams[key] = Value.simpleClone(params[key]);
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this.assign(myParams);
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}
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,assign: function(params) {
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params = this.transformParams(params);
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var diff = Value.partialDiff(this._params, params);
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this._assign(diff);
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}
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,setAll: function(params) {
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params = this.transformParams(params);
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var diff = Value.diff(this._params, params);
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this._assign(diff);
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}
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,_assign: function(diff) {
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if (diff) {
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Object.assign(this._params, diff);
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if (this.source) {
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this._lockSource = true;
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this.source.assign(diff);
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this._lockSource = false;
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}
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this._paramsChanged(diff);
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this.changed(diff);
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}
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}
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,transformParams: function(params) {
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var newParams = {};
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for (var key in this._specs) {
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var spec = this._specs[key];
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if (params[key])
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newParams[key] = cast(params[key], spec.type);
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}
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return Object.assign(params, newParams);
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}
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});
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function cast(value, type) {
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switch (type) {
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case Boolean:
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return (/^(true|1)$/i).test(value);
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case Number:
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return 0 + new Number(value);
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case Date:
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var date = new Date(value);
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date.setHours(0, 0, 0, 0);
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return date;
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case String:
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return value;
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default:
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if (type instanceof Object)
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return JSON.parse(value);
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else
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return value;
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}
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}
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