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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 2482x 2482x 2482x 2482x 315x 2167x 2167x 2482x 2482x 2482x 2482x 300107x 22660x 277447x 277447x 120851x 83041x 69743x 43476x 40189x 40183x 4644x 37810x 98883x 37810x 37810x 6x 6x 6x 6x 6x 18x 18x 16x 16x 6x 6x 13298x 13298x 13298x 12090x 12090x 12090x 12090x 1088x 11002x 11002x 16199x 11002x 13298x 13298x 26267x 26267x 109402x 26267x 26267x 4644x 4644x 57762x 4644x 4644x 3287x 3287x 35539x 35539x 35539x 2x 2x 2x 35537x 8816x 8816x 35539x | 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;
}
}
|