74 lines
1.7 KiB
JavaScript
74 lines
1.7 KiB
JavaScript
import Ember from "ember";
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import extractValue from "./extract-value";
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const { computed, get } = Ember;
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export default function handleDescriptor(target, key, desc, params = []) {
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return {
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enumerable: desc.enumerable,
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configurable: desc.configurable,
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writeable: desc.writeable,
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initializer: function() {
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let computedDescriptor;
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if (desc.writable) {
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var val = extractValue(desc);
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if (typeof val === "object") {
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let value = {};
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if (val.get) {
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value.get = callUserSuppliedGet(params, val.get);
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}
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if (val.set) {
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value.set = callUserSuppliedSet(params, val.set);
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}
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computedDescriptor = value;
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} else {
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computedDescriptor = callUserSuppliedGet(params, val);
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}
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} else {
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throw new Error(
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"ember-computed-decorators does not support using getters and setters"
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);
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}
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return computed.apply(null, params.concat(computedDescriptor));
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}
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};
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}
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function niceAttr(attr) {
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const parts = attr.split(".");
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let i;
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for (i = 0; i < parts.length; i++) {
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if (
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parts[i] === "@each" ||
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parts[i] === "[]" ||
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parts[i].indexOf("{") !== -1
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) {
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break;
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}
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}
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return parts.slice(0, i).join(".");
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}
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function callUserSuppliedGet(params, func) {
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params = params.map(niceAttr);
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return function() {
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let paramValues = params.map(p => get(this, p));
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return func.apply(this, paramValues);
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};
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}
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function callUserSuppliedSet(params, func) {
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params = params.map(niceAttr);
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return function(key, value) {
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let paramValues = params.map(p => get(this, p));
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paramValues.unshift(value);
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return func.apply(this, paramValues);
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};
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}
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