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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 | 159x 159x 159x 159x 159x 159x 159x 159x 460x 460x 460x 6364x 6364x 6364x 6364x 5988x 6364x 5988x 5988x 5988x 5988x 5988x 5988x 5988x 5988x 5988x 376x 376x 376x 376x 376x 5988x 5988x 5988x 5988x 5988x 5988x 5988x 5988x 460x 99071x 99071x 99071x 99071x 460x 758354x 758354x 460x 22624x 460x 6364x 6364x 6285x 152435x 152435x 2134x 2134x 262837x 158773x 152435x 102166x 26566x 25988x 13634x 104064x 104064x 104064x 1137x 1137x 102927x 102927x 6338x 6338x 6338x 75600x 75600x 75600x 75600x 460x 225595x 225595x 578x 578x 578x 578x 578x 578x 2783x 2783x 2781x 50269x 50269x 50269x 50269x 336639x 336639x 160582x 13634x 13634x 13634x 13634x 13634x 162016x 162016x 162016x 162016x 162016x 48378x 12354x 12354x 12354x 12354x 12354x 12354x 18349x 18349x 18349x 18349x 18349x 14353x 21838x | 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])!); } } } |