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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 | 174x 174x 174x 174x 174x 174x 174x 475x 475x 475x 6298x 6298x 6298x 6298x 5922x 6298x 5922x 5922x 5922x 5922x 5922x 5922x 5922x 5922x 5922x 376x 376x 376x 376x 376x 5922x 5922x 5922x 5922x 5922x 5922x 5922x 5922x 475x 95892x 95892x 95892x 95892x 475x 746554x 746554x 475x 22512x 475x 6298x 6298x 6219x 147432x 147432x 2196x 2196x 243884x 151775x 147432x 99859x 25995x 25413x 14147x 92109x 92109x 92109x 1137x 1137x 90972x 90972x 4343x 4343x 4343x 73864x 73864x 73864x 73864x 475x 210310x 210310x 582x 582x 582x 582x 582x 582x 2795x 2795x 2793x 47573x 47573x 47573x 47573x 344941x 344941x 160116x 14147x 14147x 14147x 14147x 14147x 163006x 163006x 163006x 163006x 163006x 48419x 11266x 11266x 11266x 11266x 11266x 11266x 16098x 16098x 16098x 16098x 16098x 14426x 20219x | import * as nodes from '../../../nodes'; import {ClockEncoder} from '../../../../json-crdt-patch/codec/clock/ClockEncoder'; import {CrdtWriter} from '../../../../json-crdt-patch/util/binary/CrdtWriter'; import {type ITimestampStruct, Timestamp} from '../../../../json-crdt-patch/clock'; import {CborEncoder} from '@jsonjoy.com/json-pack/lib/cbor/CborEncoder'; import {SESSION} from '../../../../json-crdt-patch/constants'; import {CRDT_MAJOR_OVERLAY} from './constants'; import type {Model} from '../../../model'; export class Encoder extends CborEncoder<CrdtWriter> { protected clockEncoder: ClockEncoder = new ClockEncoder(); protected time: number = 0; protected doc!: Model; constructor(writer?: CrdtWriter) { super(writer || new CrdtWriter()); } public encode(doc: Model<any>): Uint8Array { this.doc = doc; const writer = this.writer; writer.reset(); if (doc.clock.sid === SESSION.SERVER) this.encodeServer(doc); else this.encodeLogical(doc); return writer.flush(); } public encodeLogical(model: Model): void { const writer = this.writer; this.ts = this.tsLogical; this.clockEncoder.reset(model.clock); writer.ensureCapacity(4); const x0 = writer.x0; const x = writer.x; writer.x += 4; this.cRoot(model.root); this.encodeClockTable(x0, x); } public encodeServer(model: Model): void { this.ts = this.tsServer; const writer = this.writer; writer.u8(0b10000000); writer.vu57((this.time = model.clock.time)); this.cRoot(model.root); } protected encodeClockTable(x0: number, x: number) { const writer = this.writer; const shift = writer.x0 - x0; writer.view.setUint32(writer.x0 + (x - x0), writer.x - x - shift - 4); const clockEncoder = this.clockEncoder!; const table = clockEncoder.table; const length = table.size; writer.vu57(length); table.forEach(this.cTableEntry); } protected readonly cTableEntry = (entry: {clock: ITimestampStruct}) => { const clock = entry.clock; const writer = this.writer; writer.vu57(clock.sid); writer.vu57(clock.time); }; protected readonly tsLogical = (ts: ITimestampStruct): void => { const relativeId = this.clockEncoder!.append(ts); this.writer.id(relativeId.sessionIndex, relativeId.timeDiff); }; protected readonly tsServer = (ts: ITimestampStruct): void => { this.writer.vu57(ts.time); }; protected ts: (ts: ITimestampStruct) => void = this.tsLogical; protected cRoot(root: nodes.RootNode): void { const val = root.val; if (val.sid === SESSION.SYSTEM) this.writer.u8(0); else this.cNode(root.node()); } protected writeTL(majorOverlay: CRDT_MAJOR_OVERLAY, length: number): void { const writer = this.writer; if (length < 0b11111) writer.u8(majorOverlay | length); else { writer.u8(majorOverlay | 0b11111); writer.vu57(length); } } protected cNode(node: nodes.JsonNode): void { // TODO: PERF: use a switch? if (node instanceof nodes.ConNode) this.cCon(node); else if (node instanceof nodes.ValNode) this.cVal(node); else if (node instanceof nodes.StrNode) this.cStr(node); else if (node instanceof nodes.ObjNode) this.cObj(node); else if (node instanceof nodes.VecNode) this.cVec(node); else if (node instanceof nodes.ArrNode) this.cArr(node); else if (node instanceof nodes.BinNode) this.cBin(node); } protected cCon(node: nodes.ConNode): void { const val = node.val; this.ts(node.id); if (val instanceof Timestamp) { this.writer.u8(1); // this.writeTL(CRDT_MAJOR_OVERLAY.CON, 1); this.ts(val as Timestamp); } else { this.writer.u8(0); // this.writeTL(CRDT_MAJOR_OVERLAY.CON, 0); this.writeAny(val); } } protected cVal(node: nodes.ValNode): void { this.ts(node.id); this.writer.u8(0b00100000); // this.writeTL(CRDT_MAJOR_OVERLAY.VAL, 0); this.cNode(node.node()); } protected cObj(node: nodes.ObjNode): void { this.ts(node.id); const keys = node.keys; this.writeTL(CRDT_MAJOR_OVERLAY.OBJ, keys.size); keys.forEach(this.cKey); } protected readonly cKey = (val: ITimestampStruct, key: string) => { this.writeStr(key); this.cNode(this.doc.index.get(val)!); }; protected cVec(node: nodes.VecNode): void { const elements = node.elements; const length = elements.length; this.ts(node.id); this.writeTL(CRDT_MAJOR_OVERLAY.VEC, length); const index = this.doc.index; for (let i = 0; i < length; i++) { const elementId = elements[i]; if (!elementId) this.writer.u8(0); else this.cNode(index.get(elementId)!); } } protected cStr(node: nodes.StrNode): void { const ts = this.ts; ts(node.id); this.writeTL(CRDT_MAJOR_OVERLAY.STR, node.count); for (let chunk = node.first(); chunk; chunk = node.next(chunk)) { ts(chunk.id); if (chunk.del) this.writeUInteger(chunk.span); else this.writeStr(chunk.data!); } } protected cBin(node: nodes.BinNode): void { const ts = this.ts; const writer = this.writer; ts(node.id); this.writeTL(CRDT_MAJOR_OVERLAY.BIN, node.count); for (let chunk = node.first(); chunk; chunk = node.next(chunk)) { ts(chunk.id); const length = chunk.span; const deleted = chunk.del; writer.b1vu56(~~deleted as 0 | 1, length); if (deleted) continue; writer.buf(chunk.data!, length); } } protected cArr(node: nodes.ArrNode): void { const ts = this.ts; const writer = this.writer; ts(node.id); this.writeTL(CRDT_MAJOR_OVERLAY.ARR, node.count); const index = this.doc.index; for (let chunk = node.first(); chunk; chunk = node.next(chunk)) { ts(chunk.id); const span = chunk.span; const deleted = chunk.del; writer.b1vu56(~~deleted as 0 | 1, span); if (deleted) continue; const nodes = chunk.data!; for (let i = 0; i < span; i++) this.cNode(index.get(nodes[i])!); } } } |