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68 lines
1.9 KiB
68 lines
1.9 KiB
3 years ago
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import isEmpty from './isEmpty'
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import debounce from './debounce'
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/**
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* bind func to obj
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*/
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function bindFunc(obj, method, observer) {
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const oldFn = obj[method]
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obj[method] = function(target) {
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if (observer) {
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observer.call(this, target, {
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[method]: true,
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})
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}
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if (oldFn) {
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oldFn.call(this, target)
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}
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}
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}
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// default methods
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const methods = ['linked', 'linkChanged', 'unlinked']
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// extra props
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const extProps = ['observer']
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export default Behavior({
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lifetimes: {
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created() {
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this._debounce = null
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},
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detached() {
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if (this._debounce && this._debounce.cancel) {
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this._debounce.cancel()
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}
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},
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},
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definitionFilter(defFields) {
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const { relations } = defFields
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if (!isEmpty(relations)) {
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for (const key in relations) {
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const relation = relations[key]
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// bind func
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methods.forEach((method) => bindFunc(relation, method, relation.observer))
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// delete extProps
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extProps.forEach((prop) => delete relation[prop])
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}
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}
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Object.assign(defFields.methods = (defFields.methods || {}), {
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getRelationsName: function(types = ['parent', 'child', 'ancestor', 'descendant']) {
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return Object.keys(relations || {}).map((key) => {
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if (relations[key] && types.includes(relations[key].type)) {
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return key
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}
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return null
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}).filter((v) => !!v)
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},
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debounce: function(func, wait = 0, immediate = false) {
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return (this._debounce = this._debounce || debounce(func.bind(this), wait, immediate)).call(this)
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},
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})
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},
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})
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