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 | 11x 11x 11x 11x 11x 11x 11x 11x 150x 1600x 1600x 1600x 1600x 1602x 1602x 1602x 1602x 1602x 1602x 1600x 1600x 1600x 1602x 1602x 1602x 1602x 68085x 68085x 64885x 64885x 64885x 64885x 64885x 1602x 218863x 218863x 64885x 64885x 64885x 64885x 64885x 64885x 22117x 640x 20792x 1x 13464x 3730x 4141x 22117x 22117x 22117x 22117x 640x 640x 640x 20792x 20792x 20792x 20792x 57520x 57520x 57520x 20792x 1x 1x 1x 1x 1x 1x 1x 1x 13464x 13464x 13464x 150x 97294x 97294x 97294x 97294x 97294x 52467x 3730x 3730x 3730x 150x 52317x 52317x 52317x 52317x 13451x 4141x 4141x 4141x 150x 4362x 4362x 4362x 4362x 3993x 5128x 3993x | import * as nodes from '../../../nodes';
import {ClockTable} from '../../../../json-crdt-patch/codec/clock/ClockTable';
import {CrdtReader} from '../../../../json-crdt-patch/util/binary/CrdtReader';
import type {IndexedFields, FieldName, IndexedNodeFields} from './types';
import {type ITimestampStruct, type IClockVector, Timestamp, ClockVector} from '../../../../json-crdt-patch/clock';
import {Model, UNDEFINED} from '../../../model/Model';
import {CborDecoderBase} from '@jsonjoy.com/json-pack/lib/cbor/CborDecoderBase';
import {CRDT_MAJOR} from '../../structural/binary/constants';
export class Decoder {
public readonly dec: CborDecoderBase<CrdtReader>;
protected doc!: Model;
protected clockTable?: ClockTable;
constructor(reader?: CrdtReader) {
this.dec = new CborDecoderBase<CrdtReader>(reader || new CrdtReader());
}
public decode<M extends Model>(
fields: IndexedFields,
ModelConstructor: new (clock: IClockVector) => M = Model as unknown as new (
clock: IClockVector,
) => M,
): M {
const reader = this.dec.reader;
reader.reset(fields.c);
const clockTable = (this.clockTable = ClockTable.decode(reader));
return this.decodeFields(clockTable, fields, ModelConstructor);
}
public decodeFields<M extends Model>(
clockTable: ClockTable,
fields: IndexedNodeFields,
ModelConstructor: new (clock: IClockVector) => M = Model as unknown as new (
clock: IClockVector,
) => M,
): M {
const reader = this.dec.reader;
const firstClock = clockTable.byIdx[0];
const vectorClock = new ClockVector(firstClock.sid, firstClock.time + 1);
const doc = (this.doc = new ModelConstructor(vectorClock));
const root = fields.r;
if (root && root.length) {
reader.reset(root);
const rootValue = this.ts();
doc.root.set(rootValue);
}
const index = doc.index;
const keys = Object.keys(fields);
const length = keys.length;
for (let i = 0; i < length; i++) {
const field = keys[i];
if (field.length < 3) continue; // Skip "c" and "r".
const arr = fields[field as FieldName];
const id = clockTable.parseField(field as FieldName);
reader.reset(arr);
const node = this.decodeNode(id);
index.set(id, node);
}
return doc;
}
protected ts(): ITimestampStruct {
const [sessionIndex, timeDiff] = this.dec.reader.id();
return new Timestamp(this.clockTable!.byIdx[sessionIndex].sid, timeDiff);
}
protected decodeNode(id: ITimestampStruct): nodes.JsonNode {
const reader = this.dec.reader;
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.decodeCon(id, length);
case CRDT_MAJOR.VAL:
return this.decodeVal(id);
case CRDT_MAJOR.OBJ:
return this.decodeObj(id, length);
case CRDT_MAJOR.VEC:
return this.decodeVec(id, length);
case CRDT_MAJOR.STR:
return this.decodeStr(id, length);
case CRDT_MAJOR.BIN:
return this.decodeBin(id, length);
case CRDT_MAJOR.ARR:
return this.decodeArr(id, length);
}
return UNDEFINED;
}
public decodeCon(id: ITimestampStruct, length: number): nodes.ConNode {
const decoder = this.dec;
const data = !length ? decoder.val() : this.ts();
const node = new nodes.ConNode(id, data);
return node;
}
public decodeVal(id: ITimestampStruct): nodes.ValNode {
const val = this.ts();
const node = new nodes.ValNode(this.doc, id, val);
return node;
}
public decodeObj(id: ITimestampStruct, length: number): nodes.ObjNode {
const decoder = this.dec;
const obj = new nodes.ObjNode(this.doc, id);
const keys = obj.keys;
for (let i = 0; i < length; i++) {
const key = decoder.val() + '';
const val = this.ts();
keys.set(key, val);
}
return obj;
}
public decodeVec(id: ITimestampStruct, length: number): nodes.VecNode {
const reader = this.dec.reader;
const node = new nodes.VecNode(this.doc, id);
const elements = node.elements;
for (let i = 0; i < length; i++) {
const octet = reader.u8();
Iif (!octet) elements.push(undefined);
else elements.push(this.ts());
}
return node;
}
protected decodeStr(id: ITimestampStruct, length: number): nodes.StrNode {
const node = new nodes.StrNode(id);
node.ingest(length, this.decodeStrChunk);
return node;
}
private decodeStrChunk = (): nodes.StrChunk => {
const decoder = this.dec;
const reader = decoder.reader;
const id = this.ts();
const val = decoder.val();
if (typeof val === 'string') return new nodes.StrChunk(id, val.length, val);
return new nodes.StrChunk(id, ~~(<number>val), '');
};
protected decodeBin(id: ITimestampStruct, length: number): nodes.BinNode {
const node = new nodes.BinNode(id);
node.ingest(length, this.decodeBinChunk);
return node;
}
private decodeBinChunk = (): nodes.BinChunk => {
const id = this.ts();
const reader = this.dec.reader;
const [deleted, length] = reader.b1vu56();
if (deleted) return new nodes.BinChunk(id, length, undefined);
return new nodes.BinChunk(id, length, reader.buf(length));
};
protected decodeArr(id: ITimestampStruct, length: number): nodes.ArrNode {
const node = new nodes.ArrNode(this.doc, id);
node.ingest(length, this.decodeArrChunk);
return node;
}
private decodeArrChunk = (): nodes.ArrChunk => {
const id = this.ts();
const reader = this.dec.reader;
const [deleted, length] = reader.b1vu56();
if (deleted) return new nodes.ArrChunk(id, length, undefined);
else {
const data: ITimestampStruct[] = [];
for (let i = 0; i < length; i++) data.push(this.ts());
return new nodes.ArrChunk(id, length, data);
}
};
}
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