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import {randomU32} from 'hyperdyperid/lib/randomU32';
import {Fuzzer} from '@jsonjoy.com/util/lib/Fuzzer';
import {isEmpty} from '@jsonjoy.com/util/lib/isEmpty';
import type {QuillDeltaAttributes, QuillDeltaOp, QuillDeltaOpInsert, QuillDeltaOpRetain, QuillTrace} from '../types';
import {RandomJson} from '@jsonjoy.com/util/lib/json-random';
import {removeErasures} from '../util';
export interface QuillDeltaFuzzerOptions {
maxOperationsPerPatch: number;
}
export class QuillDeltaFuzzer {
public options: QuillDeltaFuzzerOptions;
public delta: Delta = new Delta([]);
public patch: QuillDeltaOp[] = [];
public transactions: QuillDeltaOp[][] = [];
constructor(options: Partial<QuillDeltaFuzzerOptions> = {}) {
this.options = {
maxOperationsPerPatch: 3,
...options,
};
}
public trace(): QuillTrace {
return {
contents: {ops: this.delta.ops as QuillDeltaOp[]},
transactions: this.transactions,
};
}
public applyPatch(): Delta {
this.transactions.push(this.patch);
this.delta = this.delta.compose(new Delta(this.patch));
return this.delta;
}
public createPatch(): QuillDeltaOp[] {
this.patch = [];
let pos = 0;
const length = this.delta.length();
const opCount = randomU32(1, this.options.maxOperationsPerPatch);
for (let i = 0; i < opCount; i++) {
const remaining = length - pos;
if (!remaining) {
const op = Fuzzer.pick([
() => {
const [offset, patch] = this.createInsertTextOp(this.delta, pos);
this.patch.push(...patch);
pos += offset;
},
() => {
const [offset, patch] = this.createInsertEmbedOp(this.delta, pos);
this.patch.push(...patch);
pos += offset;
},
]);
op();
break;
}
const op = Fuzzer.pick([
() => {
const [offset, patch] = this.createInsertTextOp(this.delta, pos);
this.patch.push(...patch);
pos += offset;
},
() => {
const [offset, patch] = this.createInsertEmbedOp(this.delta, pos);
this.patch.push(...patch);
pos += offset;
},
() => {
const [offset, patch] = this.createDeleteOp(length, pos);
this.patch.push(...patch);
pos += offset;
},
() => {
const [offset, patch] = this.createAnnotateOp(length, pos);
this.patch.push(...patch);
pos += offset;
},
]);
op();
}
return this.patch;
}
public createInsertOp(delta: Delta, pos: number): [offset: number, patch: QuillDeltaOp[]] {
const [offset, patch] = this.createInsertTextOp(delta, pos);
return [offset, patch];
}
public createInsertTextOp(delta: Delta, pos: number): [offset: number, patch: QuillDeltaOp[]] {
const length = delta.length();
const remaining = length - pos;
const offset = !remaining ? 0 : randomU32(0, remaining);
const text = RandomJson.genString(randomU32(1, 5));
const patch: QuillDeltaOp[] = [];
if (offset > 0) {
patch.push({retain: offset});
}
const insertOp: QuillDeltaOpInsert = {insert: text};
if (randomU32(0, 1)) {
const attributes = removeErasures(this.createAttributes());
if (attributes && !isEmpty(attributes)) {
insertOp.attributes = attributes;
}
}
patch.push(insertOp);
return [offset, patch];
}
public createInsertEmbedOp(delta: Delta, pos: number): [offset: number, patch: QuillDeltaOp[]] {
const length = delta.length();
const remaining = length - pos;
const offset = !remaining ? 0 : randomU32(0, remaining);
const insert = {link: RandomJson.genString(randomU32(1, 5))};
const patch: QuillDeltaOp[] = [];
if (offset > 0) {
patch.push({retain: offset});
}
const insertOp: QuillDeltaOpInsert = {insert};
if (randomU32(0, 1)) {
const attributes = removeErasures(this.createAttributes());
if (attributes && !isEmpty(attributes)) {
insertOp.attributes = attributes;
}
}
return [offset, patch];
}
public createDeleteOp(length: number, pos: number): [offset: number, patch: QuillDeltaOp[]] {
const remaining = length - pos;
Iif (remaining <= 0) return [pos, []];
const deleteLength = randomU32(1, remaining);
const patch: QuillDeltaOp[] = [{delete: deleteLength}];
return [deleteLength, patch];
}
public createAnnotateOp(length: number, pos: number): [offset: number, patch: QuillDeltaOp[]] {
const remaining = length - pos;
Iif (remaining <= 0) return [pos, []];
const offset = remaining < 2 ? 0 : randomU32(0, remaining - 1);
const annotationLength = randomU32(1, remaining - offset);
const patch: QuillDeltaOp[] = [];
if (offset > 0) {
patch.push({retain: offset});
}
const retainOp: QuillDeltaOpRetain = {retain: annotationLength};
const attributes = this.createAttributes();
if (attributes && !isEmpty(attributes)) {
retainOp.attributes = attributes;
}
patch.push(retainOp);
return [offset + annotationLength, patch];
}
public createAttributes(): QuillDeltaAttributes {
const length = randomU32(1, 3);
const attrKeys = ['bold', 'italic', 'color'];
const attributes: QuillDeltaAttributes = {};
for (let i = 0; i < length; i++) {
const attrKey = Fuzzer.pick(attrKeys);
switch (attrKey) {
case 'bold': {
attributes.bold = Fuzzer.pick([true, null]);
break;
}
case 'italic': {
attributes.italic = Fuzzer.pick([true, null]);
break;
}
case 'color': {
attributes.color = Fuzzer.pick(['red', 'blue', null]);
break;
}
}
}
return attributes;
}
}
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