271 lines
8.0 KiB
JavaScript
271 lines
8.0 KiB
JavaScript
import {LitElement, html, unsafeHTML} from './lit-all.min.js';
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import * as tfrpc from '/static/tfrpc.js';
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import * as commonmark from './commonmark.min.js';
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class TfWikiDocElement extends LitElement {
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static get properties() {
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return {
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whoami: {type: String},
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wiki: {type: Object},
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value: {type: Object},
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blob: {type: String},
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blob_original: {type: String},
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blob_for_value: {type: String},
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is_editing: {type: Boolean},
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};
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}
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constructor() {
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super();
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}
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markdown(md) {
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let reader = new commonmark.Parser({safe: true});
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let writer = new commonmark.HtmlRenderer();
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let parsed = reader.parse(md || '');
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let walker = parsed.walker();
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let event;
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while ((event = walker.next())) {
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let node = event.node;
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if (event.entering) {
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if (node.destination?.startsWith('&')) {
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node.destination = '/' + node.destination + '/view?filename=' + node.firstChild?.literal;
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} else if (node.type === 'link') {
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if (node.destination.indexOf(':') == -1 &&
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node.destination.indexOf('/') == -1) {
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node.destination = `#${this.wiki?.name}/${node.destination}`;
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}
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}
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}
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}
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return writer.render(parsed);
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}
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title(md) {
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let lines = (md || '').split('\n');
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for (let line of lines) {
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let m = line.match(/#+ (.*)/);
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if (m) {
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return m[1];
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}
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}
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}
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summary(md) {
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let lines = (md || '').split('\n');
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let result = [];
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let have_content = false;
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for (let line of lines) {
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if (have_content && !line.trim().length) {
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return result.join('\n');
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}
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if (!line.startsWith('#') && line.trim().length) {
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have_content = true;
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}
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if (!line.startsWith('#')) {
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result.push(line);
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}
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}
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return result.join('\n');
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}
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thumbnail(md) {
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let m = md ? md.match(/\!\[image:[^\]]+\]\((\&.{44}\.sha256)\).*/) : undefined;
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return m ? m[1] : undefined;
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}
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async load_blob() {
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let blob = await tfrpc.rpc.get_blob(this.value?.blob);
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if (blob.endsWith('.box')) {
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let d = await tfrpc.rpc.try_decrypt(this.whoami, blob);
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if (d) {
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blob = d;
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}
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}
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this.blob = blob;
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this.blob_original = blob;
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}
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on_edit(event) {
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this.blob = event.srcElement.value;
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}
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on_discard(event) {
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this.blob = this.blob_original;
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this.is_editing = false;
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}
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async append_message(draft) {
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let blob = this.blob;
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if (draft || this.value?.private) {
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blob = await tfrpc.rpc.encrypt(this.whoami, this.wiki.editors, blob);
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}
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let id = await tfrpc.rpc.store_blob(blob);
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let message = {
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type: 'wiki-doc',
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key: this.value.id,
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parent: this.value.parent,
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blob: id,
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mentions: this.blob.match(/(&.{44}.sha256)/g)?.map(x => ({link: x})),
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private: this.value?.private,
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};
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if (draft) {
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message.recps = this.value.editors;
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message = await tfrpc.rpc.encrypt(this.whoami, this.value.editors, JSON.stringify(message));
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}
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await tfrpc.rpc.appendMessage(this.whoami, message);
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this.is_editing = false;
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}
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async on_save_draft() {
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return this.append_message(true);
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}
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async on_publish() {
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return this.append_message(false);
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}
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async on_blog_publish() {
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let blob = this.blob;
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let id = await tfrpc.rpc.store_blob(blob);
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let message = {
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type: 'blog',
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key: this.value.id,
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parent: this.value.parent,
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title: this.title(blob),
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summary: this.summary(blob),
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thumbnail: this.thumbnail(blob),
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blog: id,
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mentions: this.blob.match(/(&.{44}.sha256)/g)?.map(x => ({link: x})),
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};
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await tfrpc.rpc.appendMessage(this.whoami, message);
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this.is_editing = false;
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}
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convert_to_format(buffer, type, mime_type) {
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return new Promise(function(resolve, reject) {
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let img = new Image();
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img.onload = function() {
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let canvas = document.createElement('canvas');
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let width_scale = Math.min(img.width, 1024) / img.width;
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let height_scale = Math.min(img.height, 1024) / img.height;
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let scale = Math.min(width_scale, height_scale);
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canvas.width = img.width * scale;
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canvas.height = img.height * scale;
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let context = canvas.getContext('2d');
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context.drawImage(img, 0, 0, canvas.width, canvas.height);
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let data_url = canvas.toDataURL(mime_type);
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let result = atob(data_url.split(',')[1]).split('').map(x => x.charCodeAt(0));
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resolve(result);
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};
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img.onerror = function(event) {
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reject(new Error('Failed to load image.'));
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};
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let raw = Array.from(new Uint8Array(buffer)).map(b => String.fromCharCode(b)).join('');
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let original = `data:${type};base64,${btoa(raw)}`;
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img.src = original;
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});
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}
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humanSize(value) {
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let units = ['B', 'kB', 'MB', 'GB'];
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let i = 0;
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while (i < units.length - 1 && value >= 1024) {
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value /= 1024;
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i++;
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}
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return `${Math.round(value * 10) / 10} ${units[i]}`;
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}
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async add_file(editor, file) {
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try {
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let self = this;
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let buffer = await file.arrayBuffer();
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let type = file.type;
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let insert;
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if (type.startsWith('image/')) {
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let best_buffer;
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let best_type;
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for (let format of ['image/png', 'image/jpeg', 'image/webp']) {
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let test_buffer = await self.convert_to_format(buffer, file.type, format);
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if (!best_buffer || test_buffer.length < best_buffer.length) {
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best_buffer = test_buffer;
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best_type = format;
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}
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}
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buffer = best_buffer;
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type = best_type;
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let id = await tfrpc.rpc.store_blob(buffer);
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let name = type.split('/')[0] + ':' + file.name;
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insert = `\n`;
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} else {
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buffer = Array.from(new Uint8Array(buffer));
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let id = await tfrpc.rpc.store_blob(buffer);
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let name = file.name;
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insert = `\n[${name}](${id}) (${this.humanSize(buffer.length)})`;
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}
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document.execCommand('insertText', false, insert);
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self.on_edit({srcElement: editor});
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} catch(e) {
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alert(e?.message);
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}
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}
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paste(event) {
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let self = this;
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for (let item of event.clipboardData.items) {
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let file = item.getAsFile();
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if (file) {
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self.add_file(event.srcElement, file);
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event.preventDefault();
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}
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}
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}
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render() {
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let value = JSON.stringify(this.value);
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if (this.blob_for_value != value) {
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this.blob_for_value = value;
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this.blob = undefined;
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this.blob_original = undefined;
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this.load_blob();
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}
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let self = this;
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let thumbnail_ref = this.thumbnail(this.blob);
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return html`
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<style>
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a:link { color: #268bd2 }
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a:visited { color: #6c71c4 }
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a:hover { color: #859900 }
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a:active { color: #2aa198 }
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</style>
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<div style="display: inline-flex; flex-direction: row">
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<button ?disabled=${!this.whoami || this.is_editing} @click=${() => self.is_editing = true}>Edit</button>
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<button ?disabled=${this.blob == this.blob_original} @click=${this.on_save_draft}>Save Draft</button>
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<button ?disabled=${this.blob == this.blob_original && !this.value?.draft} @click=${this.on_publish}>Publish</button>
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<button ?disabled=${!this.is_editing} @click=${this.on_discard}>Discard</button>
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<button ?disabled=${!this.is_editing} @click=${() => self.value = Object.assign({}, self.value, {private: !self.value.private})}>${this.value?.private ? 'Make Public' : 'Make Private'}</button>
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<button ?disabled=${!this.is_editing} @click=${this.on_blog_publish}>Publish Blog</button>
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</div>
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<div ?hidden=${!this.value?.private} style="color: #800">🔒 document is private</div>
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<div style="display: flex; flex-direction: row; ${this.value?.private ? 'border-top: 4px solid #800' : ''}">
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<textarea
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?hidden=${!this.is_editing}
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style="flex: 1 1; min-height: 10em; ${this.value?.private ? 'border: 4px solid #800' : ''}"
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@input=${this.on_edit}
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@paste=${this.paste}
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.value=${this.blob ?? ''}></textarea>
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<div style="flex: 1 1">
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<div ?hidden=${!this.is_editing} style="border: 1px solid #fff; border-radius: 1em; padding: 0.5em">
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<img ?hidden=${!thumbnail_ref} style="max-width: 128px; max-height: 128px; float: right" src="/${thumbnail_ref}/view">
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<h1 ?hidden=${!this.title(this.blob)}>${unsafeHTML(this.markdown(this.title(this.blob)))}</h1>
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${unsafeHTML(this.markdown(this.summary(this.blob)))}
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</div>
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${unsafeHTML(this.markdown(this.blob))}
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</div>
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</div>
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`;
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}
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}
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customElements.define('tf-wiki-doc', TfWikiDocElement); |