1import yorkie, { DocEventType, Indexable, OpInfo } from '@yorkie-js/sdk';
2import ColorHash from 'color-hash';
3import Quill, { Delta, type Op } from 'quill';
4import QuillCursors from 'quill-cursors';
5import 'quill/dist/quill.snow.css';
6import { network } from './network';
7import './style.css';
8import { YorkieDoc, YorkiePresence } from './type';
9import { displayPeers } from './utils';
10
11type TextValueType = {
12  attributes?: Indexable;
13  content?: string;
14};
15
16const peersElem = document.getElementById('peers')!;
17const networkStatusElem = document.getElementById('network-status')!;
18const colorHash = new ColorHash();
19const documentKey = `vanilla-quill-${new Date()
20  .toISOString()
21  .substring(0, 10)
22  .replace(/-/g, '')}`;
23
24function toDeltaOperation<T extends TextValueType>(textValue: T): Op {
25  const { embed, ...restAttributes } = textValue.attributes ?? {};
26  if (embed) {
27    return { insert: JSON.parse(embed.toString()), attributes: restAttributes };
28  }
29
30  return {
31    insert: textValue.content || '',
32    attributes: textValue.attributes,
33  };
34}
35
36async function main() {
37  // 01-1. create client with RPCAddr then activate it.
38  const client = new yorkie.Client({
39    rpcAddr: import.meta.env.VITE_YORKIE_API_ADDR,
40    apiKey: import.meta.env.VITE_YORKIE_API_KEY,
41  });
42  await client.activate();
43
44  // 02-1. create a document then attach it into the client.
45  const doc = new yorkie.Document<YorkieDoc, YorkiePresence>(documentKey, {
46    enableDevtools: true,
47  });
48  doc.subscribe('connection', (event) => {
49    network.statusListener(networkStatusElem)(event);
50  });
51  doc.subscribe('presence', (event) => {
52    if (event.type !== DocEventType.PresenceChanged) {
53      displayPeers(peersElem, doc.getPresences(), client.getID()!);
54    }
55  });
56
57  await client.attach(doc, {
58    initialPresence: {
59      username: client.getID()!.slice(-2),
60      color: colorHash.hex(client.getID()!.slice(-2)),
61      selection: undefined,
62    },
63  });
64
65  doc.update((root) => {
66    if (!root.content) {
67      root.content = new yorkie.Text();
68      root.content.edit(0, 0, '\n');
69    }
70  }, 'create content if not exists');
71
72  // 02-2. subscribe document event.
73  doc.subscribe((event) => {
74    if (event.type === 'snapshot') {
75      // The text is replaced to snapshot and must be re-synced.
76      syncText();
77    }
78  });
79
80  doc.subscribe('$.content', (event) => {
81    if (event.type === 'remote-change') {
82      handleOperations(event.value.operations);
83    }
84    updateAllCursors();
85  });
86  doc.subscribe('others', (event) => {
87    if (event.type === DocEventType.Unwatched) {
88      cursors.removeCursor(event.value.clientID);
89    } else if (event.type === DocEventType.PresenceChanged) {
90      updateCursor(event.value);
91    }
92  });
93
94  function updateCursor(user: { clientID: string; presence: YorkiePresence }) {
95    const { clientID, presence } = user;
96    if (clientID === client.getID()) return;
97    // TODO(chacha912): After resolving the presence initialization issue(#608),
98    // remove the following check.
99    if (!presence) return;
100
101    const { username, color, selection } = presence;
102    if (!selection) return;
103    const range = doc.getRoot().content.posRangeToIndexRange(selection);
104    cursors.createCursor(clientID, username, color);
105    cursors.moveCursor(clientID, {
106      index: range[0],
107      length: range[1] - range[0],
108    });
109  }
110
111  function updateAllCursors() {
112    for (const user of doc.getPresences()) {
113      updateCursor(user);
114    }
115  }
116
117  await client.sync();
118
119  // 03. create an instance of Quill
120  Quill.register('modules/cursors', QuillCursors);
121  const quill = new Quill('#editor', {
122    modules: {
123      // Simplified toolbar: keep only core formatting features.
124      // Add or remove items easily by editing this array.
125      toolbar: [
126        ['bold', 'italic', 'underline'],
127        [{ header: 1 }, { header: 2 }],
128        [{ list: 'ordered' }, { list: 'bullet' }],
129        ['blockquote', 'code-block'],
130        ['image', 'video'],
131        ['clean'],
132      ],
133      cursors: true,
134    },
135    theme: 'snow',
136  });
137  const cursors = quill.getModule('cursors') as QuillCursors;
138
139  // 04. bind the document with the Quill.
140  // 04-1. Quill to Document.
141  quill
142    .on('text-change', (delta, _, source) => {
143      if (source === 'api' || !delta.ops) {
144        return;
145      }
146
147      let from = 0,
148        to = 0;
149      console.log(`%c quill: ${JSON.stringify(delta.ops)}`, 'color: green');
150      for (const op of delta.ops) {
151        if (op.attributes !== undefined || op.insert !== undefined) {
152          if (op.retain !== undefined && typeof op.retain === 'number') {
153            to = from + op.retain;
154          }
155          console.log(
156            `%c local: ${from}-${to}: ${op.insert} ${
157              op.attributes ? JSON.stringify(op.attributes) : '{}'
158            }`,
159            'color: green',
160          );
161
162          doc.update((root, presence) => {
163            let range;
164            if (op.attributes !== undefined && op.insert === undefined) {
165              root.content.setStyle(from, to, op.attributes as Indexable);
166            } else if (op.insert !== undefined) {
167              if (to < from) {
168                to = from;
169              }
170
171              if (typeof op.insert === 'object') {
172                range = root.content.edit(from, to, ' ', {
173                  embed: JSON.stringify(op.insert),
174                  ...op.attributes,
175                });
176              } else {
177                range = root.content.edit(
178                  from,
179                  to,
180                  op.insert,
181                  op.attributes as Indexable,
182                );
183              }
184              from =
185                to + (typeof op.insert === 'string' ? op.insert.length : 1);
186            }
187
188            if (range) {
189              presence.set({
190                selection: root.content.indexRangeToPosRange(range),
191              });
192            }
193          }, `update style by ${client.getID()}`);
194        } else if (op.delete !== undefined) {
195          to = from + op.delete;
196          console.log(`%c local: ${from}-${to}: ''`, 'color: green');
197
198          doc.update((root, presence) => {
199            const range = root.content.edit(from, to, '');
200            if (range) {
201              presence.set({
202                selection: root.content.indexRangeToPosRange(range),
203              });
204            }
205          }, `update content by ${client.getID()}`);
206        } else if (op.retain !== undefined && typeof op.retain === 'number') {
207          from = to + op.retain;
208          to = from;
209        }
210      }
211    })
212    .on('selection-change', (range, _, source) => {
213      if (!range) {
214        return;
215      }
216
217      // NOTE(chacha912): If the selection in the Quill editor does not match the range computed by yorkie,
218      // additional updates are necessary. This condition addresses situations where Quill's selection behaves
219      // differently, such as when inserting text before a range selection made by another user, causing
220      // the second character onwards to be included in the selection.
221      if (source === 'api') {
222        const { selection } = doc.getMyPresence();
223        if (selection) {
224          const [from, to] = doc
225            .getRoot()
226            .content.posRangeToIndexRange(selection);
227          const { index, length } = range;
228          if (from === index && to === index + length) {
229            return;
230          }
231        }
232      }
233
234      doc.update((root, presence) => {
235        presence.set({
236          selection: root.content.indexRangeToPosRange([
237            range.index,
238            range.index + range.length,
239          ]),
240        });
241      }, `update selection by ${client.getID()}`);
242    });
243
244  // 04-2. document to Quill(remote).
245  function handleOperations(ops: Array<OpInfo>) {
246    const deltaOperations = [];
247    let prevTo = 0;
248    for (const op of ops) {
249      if (op.type === 'edit') {
250        const from = op.from;
251        const to = op.to;
252        const retainFrom = from - prevTo;
253        const retainTo = to - from;
254
255        const { insert, attributes } = toDeltaOperation(op.value!);
256        console.log(`%c remote: ${from}-${to}: ${insert}`, 'color: skyblue');
257
258        if (retainFrom) {
259          deltaOperations.push({ retain: retainFrom });
260        }
261        if (retainTo) {
262          deltaOperations.push({ delete: retainTo });
263        }
264        if (insert) {
265          const op: Op = { insert };
266          if (attributes) {
267            op.attributes = attributes;
268          }
269          deltaOperations.push(op);
270        }
271        prevTo = to;
272      } else if (op.type === 'style') {
273        const from = op.from;
274        const to = op.to;
275        const retainFrom = from - prevTo;
276        const retainTo = to - from;
277        const { attributes } = toDeltaOperation(op.value!);
278        console.log(
279          `%c remote: ${from}-${to}: ${JSON.stringify(attributes)}`,
280          'color: skyblue',
281        );
282
283        if (retainFrom) {
284          deltaOperations.push({ retain: retainFrom });
285        }
286        if (attributes) {
287          const op: Op = { attributes };
288          if (retainTo) {
289            op.retain = retainTo;
290          }
291
292          deltaOperations.push(op);
293        }
294        prevTo = to;
295      }
296    }
297
298    if (deltaOperations.length) {
299      console.log(
300        `%c to quill: ${JSON.stringify(deltaOperations)}`,
301        'color: green',
302      );
303      const delta = new Delta(deltaOperations);
304      quill.updateContents(delta, 'api');
305    }
306  }
307
308  // 05. synchronize text of document and Quill.
309  function syncText() {
310    const text = doc.getRoot().content;
311
312    const delta = new Delta(
313      text.values().map((value) => toDeltaOperation(value)),
314    );
315    quill.setContents(delta, 'api');
316  }
317
318  syncText();
319  updateAllCursors();
320}
321
322main();