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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 2538x 2538x 2538x 2538x 315x 2223x 2223x 2538x 2538x 2538x 2538x 315028x 22547x 292481x 292481x 126539x 88180x 74589x 45442x 42214x 42208x 4947x 38359x 103351x 38359x 38359x 6x 6x 6x 6x 6x 18x 18x 16x 16x 6x 6x 13591x 13591x 13591x 11814x 11814x 11814x 11814x 795x 11019x 11019x 17422x 11019x 13591x 13591x 29147x 29147x 126215x 29147x 29147x 4947x 4947x 50458x 4947x 4947x 3228x 3228x 37261x 37261x 37261x 2x 2x 2x 37259x 8498x 8498x 37261x | 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;
}
}
|