kopia lustrzana https://github.com/miklobit/TiddlyWiki5
95 wiersze
2.2 KiB
JavaScript
95 wiersze
2.2 KiB
JavaScript
/*\
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title: $:/plugins/tiddlywiki/tiddlyweb/sse-server.js
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type: application/javascript
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module-type: route
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GET /events/plugins/tiddlywiki/tiddlyweb
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\*/
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(function(){
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/*jslint node: true, browser: true */
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/*global $tw: false */
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"use strict";
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var wikis = [];
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var connections = [];
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/*
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Setup up the array for this wiki and add the change listener
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*/
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function setupWiki(wiki) {
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var index = wikis.length;
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// Add a new array for this wiki (object references work as keys)
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wikis.push(wiki);
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connections.push([]);
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// Listen to change events for this wiki
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wiki.addEventListener("change",function(changes) {
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var jsonChanges = JSON.stringify(changes);
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getWikiConnections(wiki).forEach(function(item) {
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item.emit("change",jsonChanges);
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});
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});
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return index;
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}
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/*
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Setup this particular wiki if we haven't seen it before
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*/
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function ensureWikiSetup(wiki) {
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if(wikis.indexOf(wiki) === -1) {
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setupWiki(wiki);
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}
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}
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/*
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Return the array of connections for a particular wiki
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*/
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function getWikiConnections(wiki) {
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return connections[wikis.indexOf(wiki)];
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}
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function addWikiConnection(wiki,connection) {
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getWikiConnections(wiki).push(connection);
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}
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function removeWikiConnection(wiki,connection) {
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var wikiConnections = getWikiConnections(wiki);
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var index = wikiConnections.indexOf(connection);
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if(index !== -1) {
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wikiConnections.splice(index,1);
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}
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}
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function handleConnection(request,state,emit,end) {
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if(isDisabled(state)) {
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return;
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}
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ensureWikiSetup(state.wiki);
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// Add the connection to the list of connections for this wiki
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var connection = {
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request: request,
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state: state,
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emit: emit,
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end: end
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};
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addWikiConnection(state.wiki,connection);
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request.on("close",function() {
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removeWikiConnection(state.wiki,connection);
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});
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}
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function isDisabled(state) {
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return state.server.get("sse-enabled") !== "yes";
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}
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// Import the ServerSentEvents class
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var ServerSentEvents = require("$:/core/modules/server/server-sent-events.js").ServerSentEvents;
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// Instantiate the class
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var events = new ServerSentEvents("plugins/tiddlywiki/tiddlyweb", handleConnection);
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// Export the route definition for this server sent events instance
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module.exports = events.getExports();
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})();
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