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68 lines
2.2 KiB
JavaScript
68 lines
2.2 KiB
JavaScript
'use strict';
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var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
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var riotQuery = require("riot-query");
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var arrayDiff = require("arraydiff");
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module.exports = {
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init: function init() {
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var _this = this;
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var knownTags = [];
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var listeners = {};
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function triggerEvent(action, query, item) {
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if (listeners[query] != null && listeners[query][action] != null) {
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listeners[query][action].forEach(function (handler) {
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handler(item);
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});
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}
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}
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this.on("updated", function () {
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Object.keys(listeners).forEach(function (query) {
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var currentTags = riotQuery(_this, query);
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var diff = arrayDiff(knownTags, currentTags);
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diff.forEach(function (item) {
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if (item.type === "remove") {
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for (var i = item.index; i < item.index + item.howMany; i++) {
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triggerEvent("remove", query, knownTags[i]);
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}
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} else if (item.type === "move") {
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for (var _i = item.index; _i < item.from + item.howMany; _i++) {
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triggerEvent("move", query, knownTags[_i]);
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}
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} else if (item.type === "insert") {
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item.values.forEach(function (value) {
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triggerEvent("create", query, value);
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});
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}
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});
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knownTags = currentTags;
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});
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});
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this.onChild = function (eventName, handler) {
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var _eventName$split = eventName.split(":", 2);
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var _eventName$split2 = _slicedToArray(_eventName$split, 2);
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var action = _eventName$split2[0];
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var query = _eventName$split2[1];
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if (listeners[query] == null) {
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listeners[query] = {};
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}
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if (listeners[query][action] == null) {
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listeners[query][action] = [];
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}
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listeners[query][action].push(handler);
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};
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}
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}; |