Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 | 6x 6x 6x 6x 6x 6x 6x 6x 6x 160x 160x 160x 160x 160x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 225x 160x 650x 650x 650x 650x 160x 15718x 15718x 225x 225x 225x 8335x 8335x 4x 2x 10564x 8546x 8335x 5565x 2135x 2129x 161x 2020x 2020x 2020x 2020x 1x 1x 1x 2019x 2019x 211x 211x 211x 3430x 3430x 3430x 3430x 3430x 3430x 3430x 8176x 8176x 8176x 6x 6x 6x 6x 6x 6x 6x 16x 16x 14x 2770x 2770x 2770x 2770x 2770x 2770x 3476x 3476x 161x 161x 161x 161x 161x 161x 279x 279x 1968x 1968x 1968x 1968x 1968x 1968x 1968x 1396x 1396x 1396x 1396x 1396x 1363x 1363x 1938x | 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 '../../structural/binary/constants';
import {sort} from '@jsonjoy.com/util/lib/sort/insertion';
import {UNDEFINED} from '../../../model/Model';
import type {Model} from '../../../model';
export class Encoder {
protected clockEncoder: ClockEncoder = new ClockEncoder();
protected time: number = 0;
protected doc!: Model;
protected readonly viewEncoder: CborEncoder<CrdtWriter> = new CborEncoder(new CrdtWriter());
protected readonly metaEncoder: CborEncoder<CrdtWriter> = new CborEncoder(new CrdtWriter());
protected index: number = 0;
public encode(doc: Model<any>): [view: Uint8Array, meta: Uint8Array] {
this.doc = doc;
this.index = 0;
this.metaEncoder.writer.reset();
this.encodeLogical(doc);
return [this.viewEncoder.writer.flush(), this.metaEncoder.writer.flush()];
}
public encodeLogical(model: Model): void {
const writer = this.metaEncoder.writer;
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);
}
protected encodeClockTable(x0: number, x: number) {
const writer = this.metaEncoder.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.metaEncoder.writer;
writer.vu57(clock.sid);
writer.vu57(clock.time);
};
protected readonly ts = (ts: ITimestampStruct): void => {
const relativeId = this.clockEncoder!.append(ts);
this.metaEncoder.writer.id(relativeId.sessionIndex, relativeId.timeDiff);
};
protected cRoot(root: nodes.RootNode): void {
const val = root.val;
Iif (val.sid === SESSION.SYSTEM) this.metaEncoder.writer.u8(0);
else this.cNode(root.node());
}
protected writeTL(majorOverlay: CRDT_MAJOR_OVERLAY, length: number): void {
const writer = this.metaEncoder.writer;
if (length < 24) writer.u8(majorOverlay + length);
else if (length <= 0xff) writer.u16(((majorOverlay + 24) << 8) + length);
else if (length <= 0xffff) writer.u8u16(majorOverlay + 25, length);
else Ewriter.u8u32(majorOverlay + 26, 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);
const metaEncoder = this.metaEncoder;
if (val instanceof Timestamp) {
this.viewEncoder.writeNull();
metaEncoder.writer.u8(1); // this.writeTL(CRDT_MAJOR_OVERLAY.CON, 1);
this.ts(val);
} else {
this.viewEncoder.writeAny(val);
metaEncoder.writer.u8(0); // this.writeTL(CRDT_MAJOR_OVERLAY.CON, 0);
}
}
protected cVal(node: nodes.ValNode): void {
this.ts(node.id);
this.metaEncoder.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 = sort([...node.keys.keys()]);
const size = keys.length;
this.writeTL(CRDT_MAJOR_OVERLAY.OBJ, size);
const viewEncoder = this.viewEncoder;
viewEncoder.writeObjHdr(size);
for (let i = 0; i < size; i++) {
const key = keys[i];
viewEncoder.writeStr(key);
this.cNode(node.get(key)!);
}
}
protected cVec(node: nodes.VecNode): void {
this.ts(node.id);
const elements = node.elements;
const length = elements.length;
this.writeTL(CRDT_MAJOR_OVERLAY.VEC, length);
this.viewEncoder.writeArrHdr(length);
const index = this.doc.index;
for (let i = 0; i < length; i++) {
const elementId = elements[i];
if (!elementId) this.cCon(UNDEFINED);
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);
this.viewEncoder.writeStr(node.view());
const writer = this.metaEncoder.writer;
for (let chunk = node.first(); chunk; chunk = node.next(chunk)) {
ts(chunk.id);
writer.b1vu56(~~chunk.del as 0 | 1, chunk.span);
}
}
protected cBin(node: nodes.BinNode): void {
const ts = this.ts;
ts(node.id);
this.writeTL(CRDT_MAJOR_OVERLAY.BIN, node.count);
this.viewEncoder.writeBin(node.view());
const writer = this.metaEncoder.writer;
for (let chunk = node.first(); chunk; chunk = node.next(chunk)) {
ts(chunk.id);
writer.b1vu56(~~chunk.del as 0 | 1, chunk.span);
}
}
protected cArr(node: nodes.ArrNode): void {
const ts = this.ts;
ts(node.id);
this.writeTL(CRDT_MAJOR_OVERLAY.ARR, node.count);
this.viewEncoder.writeArrHdr(node.length());
const writer = this.metaEncoder.writer;
const index = this.doc.index;
for (let chunk = node.first(); chunk; chunk = node.next(chunk)) {
ts(chunk.id);
const deleted = chunk.del;
const span = chunk.span;
writer.b1vu56(~~deleted as 0 | 1, span);
if (!deleted) {
const elements = chunk.data!;
const elementsLength = elements.length;
for (let i = 0; i < elementsLength; i++) this.cNode(index.get(elements[i])!);
}
}
}
}
|