99 lines
3.8 KiB
JavaScript
99 lines
3.8 KiB
JavaScript
const loadedWidgets = {};
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const getButtons = (inputGroup) => {
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return {
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play: inputGroup.querySelector(".bergamot-play"),
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reset: inputGroup.querySelector(".bergamot-reset"),
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close: inputGroup.querySelector(".bergamot-close"),
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}
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}
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const setRunning = (inputGroup, running) => {
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if (inputGroup !== null) {
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const buttons = getButtons(inputGroup);
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if (buttons.play) buttons.play.classList.toggle("bergamot-hidden", running);
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if (buttons.reset) buttons.reset.classList.toggle("bergamot-hidden", !running);
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if (buttons.close) buttons.close.classList.toggle("bergamot-hidden", !running);
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}
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}
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// The object language parsing is handling by a separate standalone Elm
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// application in the ObjectLanguage module, which has two ports:
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//
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// * `parseString` requests a string to be parsed
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// * `parsedString` returns the parsed string, or null
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//
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// We want there to be a single global ObjectLanguage object, but it works
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// on a "subscription" model (we have to give a callback to its port).
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// Configure this callback to invoke `resolve` functions from a list,
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// so that callers can just get a promise. This way we aren't continuously
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// registering more and more handlers for each parsed string, and we can
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// use a convenient promise API.
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const parsingPromiseResolvers = {};
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const ensureObjectLanguage = () => {
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if (!window.Bergamot.ObjectLanguage) {
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window.Bergamot.ObjectLanguage = Elm.Bergamot.ObjectLanguage.init({});
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window.Bergamot.ObjectLanguage.ports.parsedString.subscribe(({ string, term }) => {
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if (string in parsingPromiseResolvers) {
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for (const resolver of parsingPromiseResolvers[string]) {
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resolver(term);
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}
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parsingPromiseResolvers[string] = [];
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}
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});
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}
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return window.Bergamot.ObjectLanguage;
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}
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const parseString = (str) => {
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if (!(str in parsingPromiseResolvers)) {
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parsingPromiseResolvers[str] = [];
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}
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return new Promise(resolve => {
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parsingPromiseResolvers[str].push(resolve);
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ensureObjectLanguage().ports.parseString.send(str);
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});
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}
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window.Bergamot = {};
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window.Bergamot.run = (inputGroup, nodeId, inputPrompt, rules, renderPreset, input) => {
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var app = Elm.Main.init({
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node: document.getElementById(nodeId),
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flags: {
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inputModes: {
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"Languge Term": { "custom": "Language Term" },
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"Query": "query"
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},
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renderRules: window.Bergamot.renderPresets[renderPreset],
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rules, input
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}
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});
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app.ports.convertInput.subscribe(async ({ mode, input }) => {
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let query = await parseString(input);
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if (query !== null) {
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query = inputPrompt.replace("TERM", query);
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app.ports.receiveConverted.send({ input, result: { query } });
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} else {
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app.ports.receiveConverted.send({ input, result: { error: "Unable to parse object language term" } });
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}
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});
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loadedWidgets[nodeId] = { app, parentNode: inputGroup ? inputGroup.parentElement : null };
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setRunning(inputGroup, true);
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};
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window.Bergamot.runPreset = (inputGroup, nodeId, presetName) => {
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const preset = window.Bergamot.presets[presetName];
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window.Bergamot.run(inputGroup, nodeId, preset.inputPrompt, preset.rules, preset.renderPreset, preset.query || "");
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};
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window.Bergamot.close = (inputGroup, nodeId) => {
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if (!(nodeId in loadedWidgets)) return;
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const placeholderDiv = document.createElement('div');
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placeholderDiv.id = nodeId;
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const widget = loadedWidgets[nodeId];
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const elmRoot = widget.parentNode.querySelector(".bergamot-root");
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elmRoot.replaceWith(placeholderDiv)
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delete loadedWidgets[nodeId];
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setRunning(inputGroup, false);
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}
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window.Bergamot.presets = {};
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window.Bergamot.renderPresets = {};
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