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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 2500x 2500x 2500x 2500x 315x 2185x 2185x 2500x 2500x 2500x 2500x 305456x 22547x 282909x 282909x 119739x 80997x 68172x 41125x 39901x 39895x 5190x 38742x 102498x 38742x 38742x 6x 6x 6x 6x 6x 18x 18x 16x 16x 6x 6x 12825x 12825x 12825x 10002x 10002x 10002x 10002x 204x 9798x 9798x 13517x 9798x 12825x 12825x 27047x 27047x 121514x 27047x 27047x 5190x 5190x 54199x 5190x 5190x 1224x 1224x 34705x 34705x 34705x 2x 2x 2x 34703x 9400x 9400x 34705x | 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;
}
}
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