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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 | 19x 19x 19x 19x 19x 19x 2491x 2491x 2491x 2491x 315x 2176x 2176x 2491x 2491x 2491x 2491x 291135x 22660x 268475x 268475x 117257x 80945x 67714x 41688x 39010x 39004x 4203x 36312x 97356x 36312x 36312x 6x 6x 6x 6x 6x 18x 18x 16x 16x 6x 6x 13231x 13231x 13231x 11406x 11406x 11406x 11406x 1290x 10116x 10116x 14732x 10116x 13231x 13231x 26026x 26026x 110528x 26026x 26026x 4203x 4203x 51942x 4203x 4203x 2678x 2678x 34801x 34801x 34801x 2x 2x 2x 34799x 8946x 8946x 34801x | import * as nodes from '../../../nodes'; import {ClockEncoder} from '../../../../json-crdt-patch/codec/clock/ClockEncoder'; import {type ITimestampStruct, Timestamp} from '../../../../json-crdt-patch/clock'; import {JsonCrdtDataType} from '../../../../json-crdt-patch/constants'; import {SESSION} from '../../../../json-crdt-patch/constants'; import type * as t from './types'; import type {Model} from '../../../model'; export class Encoder { protected time?: number; protected clock?: ClockEncoder; protected model!: Model; public encode(model: Model<any>): t.JsonCrdtCompactDocument { this.model = model; const isServerTime = model.clock.sid === SESSION.SERVER; const clock = model.clock; if (isServerTime) { this.time = clock.time; } else { this.clock = new ClockEncoder(); this.clock.reset(model.clock); } const root = model.root; const doc: t.JsonCrdtCompactDocument = [0, !root.val.time ? 0 : this.cNode(root.node())]; doc[0] = isServerTime ? this.time! : this.clock!.toJson(); return doc; } protected ts(ts: ITimestampStruct): t.JsonCrdtCompactTimestamp { switch (ts.sid) { case SESSION.SYSTEM: return [ts.sid, ts.time]; case SESSION.SERVER: return this.time! - ts.time; default: { const relativeId = this.clock!.append(ts); return [-relativeId.sessionIndex, relativeId.timeDiff]; } } } protected cNode(node: nodes.JsonNode): t.JsonCrdtCompactNode { // TODO: PERF: use switch with `node.constructor`. if (node instanceof nodes.ObjNode) return this.cObj(node); else if (node instanceof nodes.ArrNode) return this.cArr(node); else if (node instanceof nodes.StrNode) return this.cStr(node); else if (node instanceof nodes.ValNode) return this.cVal(node); else if (node instanceof nodes.VecNode) return this.cVec(node); else if (node instanceof nodes.ConNode) return this.cCon(node); else if (node instanceof nodes.BinNode) return this.cBin(node); throw new Error('UNKNOWN_NODE'); } protected cObj(obj: nodes.ObjNode): t.JsonCrdtCompactObj { const map: t.JsonCrdtCompactObj[2] = {}; obj.nodes((child, key) => (map[key] = this.cNode(child))); const res: t.JsonCrdtCompactObj = [JsonCrdtDataType.obj, this.ts(obj.id), map]; return res; } protected cVec(vec: nodes.VecNode): t.JsonCrdtCompactVec { const elements = vec.elements; const length = elements.length; const index = this.model.index; const map: t.JsonCrdtCompactVec[2] = []; for (let i = 0; i < length; i++) { const elementId = elements[i]; if (!elementId) map.push(0); else { const node = index.get(elementId)!; map.push(this.cNode(node)); } } const res: t.JsonCrdtCompactVec = [JsonCrdtDataType.vec, this.ts(vec.id), map]; return res; } protected cArr(node: nodes.ArrNode): t.JsonCrdtCompactArr { const chunks: t.JsonCrdtCompactArr[2] = []; const index = this.model.index; for (let chunk = node.first(); chunk; chunk = node.next(chunk)) { const deleted = chunk.del; const span = chunk.span; const chunkIdEncoded = this.ts(chunk.id); if (deleted) { chunks.push([chunkIdEncoded, span]); } else { const nodeIds = chunk.data!; const nodes: t.JsonCrdtCompactArrChunk[1] = []; for (let i = 0; i < span; i++) nodes.push(this.cNode(index.get(nodeIds[i])!)); chunks.push([chunkIdEncoded, nodes]); } } const res: t.JsonCrdtCompactArr = [JsonCrdtDataType.arr, this.ts(node.id), chunks]; return res; } protected cStr(node: nodes.StrNode): t.JsonCrdtCompactStr { const chunks: t.JsonCrdtCompactStr[2] = []; for (let chunk = node.first(); chunk; chunk = node.next(chunk)) chunks.push([this.ts(chunk.id), chunk.del ? chunk.span : chunk.data!] as | t.JsonCrdtCompactStrChunk | t.JsonCrdtCompactTombstone); const res: t.JsonCrdtCompactStr = [JsonCrdtDataType.str, this.ts(node.id), chunks]; return res; } protected cBin(node: nodes.BinNode): t.JsonCrdtCompactBin { const chunks: t.JsonCrdtCompactBin[2] = []; for (let chunk = node.first(); chunk; chunk = node.next(chunk)) chunks.push([this.ts(chunk.id), chunk.del ? chunk.span : chunk.data!] as | t.JsonCrdtCompactBinChunk | t.JsonCrdtCompactTombstone); const res: t.JsonCrdtCompactBin = [JsonCrdtDataType.bin, this.ts(node.id), chunks]; return res; } protected cVal(node: nodes.ValNode): t.JsonCrdtCompactVal { const res: t.JsonCrdtCompactVal = [JsonCrdtDataType.val, this.ts(node.id), this.cNode(node.node())]; return res; } protected cCon(node: nodes.ConNode): t.JsonCrdtCompactCon { const val = node.val; const res: t.JsonCrdtCompactCon = [JsonCrdtDataType.con, this.ts(node.id), val]; if (val instanceof Timestamp) { res[2] = 0; const specialData = this.ts(val); res.push(specialData); } else if (val === undefined) { res[2] = 0; res.push(0); } return res; } } |