Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 | 5x 5x 5x 5x 5x 5x 5x 5x 5x 159x 159x 159x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 217x 383x 383x 383x 217x 15915x 15915x 15915x 217x 217x 217x 10785x 10785x 10785x 10785x 10785x 10785x 10785x 2191x 385x 3312x 6x 2817x 89x 1985x 2191x 2191x 2191x 2191x 385x 385x 385x 385x 385x 3312x 3312x 3312x 3312x 3312x 3312x 8030x 8030x 8030x 3312x 3312x 6x 6x 6x 6x 6x 16x 16x 16x 14x 6x 6x 2817x 2817x 2817x 2817x 2817x 3494x 3494x 3494x 3370x 3370x 3370x 2817x 2817x 89x 89x 89x 89x 89x 112x 112x 112x 104x 104x 104x 89x 89x 1985x 1985x 1985x 1985x 1985x 1523x 1523x 1523x 1453x 2137x 1453x 1985x 1985x | import {ClockDecoder} from '../../../../json-crdt-patch/codec/clock/ClockDecoder'; import {CrdtReader} from '../../../../json-crdt-patch/util/binary/CrdtReader'; import type {ITimestampStruct} from '../../../../json-crdt-patch/clock'; import {Model, UNDEFINED} from '../../../model/Model'; import {CborDecoderBase} from '@jsonjoy.com/json-pack/lib/cbor/CborDecoderBase'; import * as nodes from '../../../nodes'; import {CRDT_MAJOR} from '../../structural/binary/constants'; import {sort} from '@jsonjoy.com/util/lib/sort/insertion'; import {SESSION} from '../../../../json-crdt-patch/constants'; export class Decoder { protected doc!: Model; protected clockDecoder?: ClockDecoder = undefined; protected time: number = -1; protected readonly decoder: CborDecoderBase<CrdtReader> = new CborDecoderBase<CrdtReader>(new CrdtReader()); public decode(view: unknown, meta: Uint8Array): Model { this.clockDecoder = undefined; this.time = -1; this.decoder.reader.reset(meta); this.decodeClockTable(); const clock = this.clockDecoder!.clock; this.doc = Model.withLogicalClock(clock); this.doc.root = new nodes.RootNode(this.doc, this.cRoot(view).id); this.clockDecoder = undefined; return this.doc; } protected decodeClockTable(): void { const reader = this.decoder.reader; const clockTableOffset = reader.u32(); const offset = reader.x; reader.x += clockTableOffset; const length = reader.vu57(); const sessionId = reader.vu57(); const time = reader.vu57(); this.clockDecoder = new ClockDecoder(sessionId, time); for (let i = 1; i < length; i++) { const sid = reader.vu57(); const time = reader.vu57(); this.clockDecoder.pushTuple(sid, time); } reader.x = offset; } protected ts(): ITimestampStruct { const decoderTime = this.time!; const [sessionIndex, timeDiff] = this.decoder.reader.id(); return this.clockDecoder!.decodeId(sessionIndex, timeDiff); } protected cRoot(view: unknown): nodes.JsonNode { const reader = this.decoder.reader; const peek = reader.uint8[reader.x]; return !peek ? UNDEFINED : this.cNode(view); } protected cNode(view: unknown): nodes.JsonNode { const reader = this.decoder.reader; const id = this.ts(); const octet = reader.u8(); const major = octet >> 5; const minor = octet & 0b11111; const length = minor < 24 ? minor : minor === 24 ? reader.u8() : minor === 25 ? reader.u16() : reader.u32(); switch (major) { case CRDT_MAJOR.CON: return this.cCon(view, id, length); case CRDT_MAJOR.VAL: return this.cVal(view, id); case CRDT_MAJOR.OBJ: return this.cObj(view, id, length); case CRDT_MAJOR.VEC: return this.cVec(view, id, length); case CRDT_MAJOR.STR: return this.cStr(view, id, length); case CRDT_MAJOR.BIN: return this.cBin(view, id, length); case CRDT_MAJOR.ARR: return this.cArr(view, id, length); } throw new Error('UNKNOWN_NODE'); } protected cCon(view: unknown, id: ITimestampStruct, length: number): nodes.ConNode { const doc = this.doc; const node = new nodes.ConNode(id, length ? this.ts() : view); doc.index.set(id, node); return node; } protected cVal(view: unknown, id: ITimestampStruct): nodes.ValNode { const child = this.cNode(view); const doc = this.doc; const node = new nodes.ValNode(doc, id, child.id); doc.index.set(id, node); return node; } protected cObj(view: unknown, id: ITimestampStruct, length: number): nodes.ObjNode { const obj = new nodes.ObjNode(this.doc, id); Iif (!view || typeof view !== 'object') throw new Error('INVALID_OBJ'); const keys = sort(Object.keys(view)); Iif (keys.length !== length) throw new Error('INVALID_OBJ'); const objKeys = obj.keys; for (let i = 0; i < length; i++) { const key = keys[i]; const childNode = this.cNode((view as any)[key]); objKeys.set(key, childNode.id); } this.doc.index.set(id, obj); return obj; } protected cVec(view: unknown, id: ITimestampStruct, length: number): nodes.VecNode { const obj = new nodes.VecNode(this.doc, id); Iif (!Array.isArray(view) || view.length !== length) throw new Error('INVALID_VEC'); const elements = obj.elements; const reader = this.decoder.reader; for (let i = 0; i < length; i++) { const child = this.cNode(view[i]); const childId = child.id; if (childId.sid === SESSION.SYSTEM) elements.push(undefined); else elements.push(childId); } this.doc.index.set(id, obj); return obj; } protected cStr(view: unknown, id: ITimestampStruct, length: number): nodes.StrNode { Iif (typeof view !== 'string') throw new Error('INVALID_STR'); const node = new nodes.StrNode(id); const reader = this.decoder.reader; let offset = 0; node.ingest(length, (): nodes.StrChunk => { const id = this.ts(); const [deleted, span] = reader.b1vu56(); if (deleted) return new nodes.StrChunk(id, span, ''); const text = view.slice(offset, offset + span); offset += span; return new nodes.StrChunk(id, text.length, text); }); this.doc.index.set(id, node); return node; } protected cBin(view: unknown, id: ITimestampStruct, length: number): nodes.BinNode { Iif (!(view instanceof Uint8Array)) throw new Error('INVALID_BIN'); const node = new nodes.BinNode(id); const reader = this.decoder.reader; let offset = 0; node.ingest(length, (): nodes.BinChunk => { const id = this.ts(); const [deleted, span] = reader.b1vu56(); if (deleted) return new nodes.BinChunk(id, span, undefined); const slice = view.slice(offset, offset + span); offset += span; return new nodes.BinChunk(id, slice.length, slice); }); this.doc.index.set(id, node); return node; } protected cArr(view: unknown, id: ITimestampStruct, length: number): nodes.ArrNode { Iif (!Array.isArray(view)) throw new Error('INVALID_ARR'); const obj = new nodes.ArrNode(this.doc, id); const reader = this.decoder.reader; let i = 0; obj.ingest(length, (): nodes.ArrChunk => { const id = this.ts(); const [deleted, span] = reader.b1vu56(); if (deleted) return new nodes.ArrChunk(id, span, undefined); const ids: ITimestampStruct[] = []; for (let j = 0; j < span; j++) ids.push(this.cNode(view[i++]).id); return new nodes.ArrChunk(id, span, ids); }); this.doc.index.set(id, obj); return obj; } } |