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import {toBase64} from '@jsonjoy.com/base64/lib/toBase64';
import {SESSION} from '../../../../json-crdt-patch/constants';
import {type ITimestampStruct, type IClockVector, Timestamp} from '../../../../json-crdt-patch/clock';
import type {Model} from '../../../model';
import type * as types from './types';
import type {Chunk} from '../../../nodes/rga';
export class Encoder {
protected model!: Model;
public encode(model: Model<any>): types.JsonCrdtVerboseDocument {
this.model = model;
const clock = model.clock;
const isServerClock = clock.sid === SESSION.SERVER;
return {
time: isServerClock ? clock.time : this.cClock(model.clock),
root: this.cVal(model.root),
};
}
public cClock(clock: IClockVector): types.JsonCrdtVerboseLogicalTimestamp[] {
const data: types.JsonCrdtVerboseLogicalTimestamp[] = [];
const sessionId = clock.sid;
const localTs = clock.peers.get(sessionId);
if (!localTs) data.push([sessionId, clock.time]);
for (const c of clock.peers.values()) data.push([c.sid, c.time]);
return data;
}
public cTs(ts: ITimestampStruct): types.JsonCrdtVerboseLogicalTimestamp | types.JsonCrdtVerboseServerTimestamp {
return ts.sid === SESSION.SERVER ? ts.time : [ts.sid, ts.time];
}
public cNode(node: nodes.JsonNode): types.JsonCrdtNode {
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.ConNode) return this.cCon(node);
else if (node instanceof nodes.BinNode) return this.cBin(node);
else if (node instanceof nodes.VecNode) return this.cVec(node);
throw new Error('UNKNOWN_NODE');
}
public cObj(obj: nodes.ObjNode): types.JsonCrdtVerboseObj {
const map: Record<string, types.JsonCrdtNode> = {};
obj.nodes((node, key) => {
map[key] = this.cNode(node);
});
return {
type: 'obj',
id: this.cTs(obj.id),
map,
};
}
public cVec(obj: nodes.VecNode): types.JsonCrdtVerboseVec {
const map: types.JsonCrdtVerboseVec['map'] = [];
const elements = obj.elements;
const length = elements.length;
const index = this.model.index;
for (let i = 0; i < length; i++) {
const element = elements[i];
if (element === undefined) map.push(null);
else map.push(this.cNode(index.get(element)!));
}
return {
type: 'vec',
id: this.cTs(obj.id),
map,
};
}
public cArr(obj: nodes.ArrNode): types.JsonCrdtVerboseArr {
const chunks: (types.JsonCrdtVerboseArrChunk | types.JsonCrdtVerboseTombstone)[] = [];
const iterator = obj.iterator();
let chunk: Chunk<ITimestampStruct[]> | undefined;
while ((chunk = iterator())) chunks.push(this.cArrChunk(chunk));
return {
type: 'arr',
id: this.cTs(obj.id),
chunks,
};
}
public cArrChunk(chunk: nodes.ArrChunk): types.JsonCrdtVerboseArrChunk | types.JsonCrdtVerboseTombstone {
if (chunk.del) {
const tombstone: types.JsonCrdtVerboseTombstone = {
id: this.cTs(chunk.id),
span: chunk.span,
};
return tombstone;
}
const index = this.model.index;
const res: types.JsonCrdtVerboseArrChunk = {
id: this.cTs(chunk.id),
value: chunk.data!.map((n) => this.cNode(index.get(n)!)),
};
return res;
}
public cStr(obj: nodes.StrNode): types.JsonCrdtVerboseStr {
const chunks: (types.JsonCrdtVerboseStrChunk | types.JsonCrdtVerboseTombstone)[] = [];
const iterator = obj.iterator();
let chunk: ReturnType<typeof iterator>;
while ((chunk = iterator())) chunks.push(this.cStrChunk(chunk as nodes.StrChunk));
return {
type: 'str',
id: this.cTs(obj.id),
chunks,
};
}
public cStrChunk(chunk: nodes.StrChunk): types.JsonCrdtVerboseStrChunk | types.JsonCrdtVerboseTombstone {
if (chunk.del) {
const tombstone: types.JsonCrdtVerboseTombstone = {
id: this.cTs(chunk.id),
span: chunk.span,
};
return tombstone;
}
const res: types.JsonCrdtVerboseStrChunk = {
id: this.cTs(chunk.id),
value: chunk.data!,
};
return res;
}
public cBin(obj: nodes.BinNode): types.JsonCrdtVerboseBin {
const chunks: (types.JsonCrdtVerboseBinChunk | types.JsonCrdtVerboseTombstone)[] = [];
const iterator = obj.iterator();
let chunk: ReturnType<typeof iterator>;
while ((chunk = iterator())) chunks.push(this.cBinChunk(chunk as nodes.BinChunk));
return {
type: 'bin',
id: this.cTs(obj.id),
chunks,
};
}
public cBinChunk(chunk: nodes.BinChunk): types.JsonCrdtVerboseBinChunk | types.JsonCrdtVerboseTombstone {
if (chunk.del) {
const tombstone: types.JsonCrdtVerboseTombstone = {
id: this.cTs(chunk.id),
span: chunk.span,
};
return tombstone;
}
const res: types.JsonCrdtVerboseStrChunk = {
id: this.cTs(chunk.id),
value: toBase64(chunk.data!),
};
return res;
}
public cVal(obj: nodes.ValNode): types.JsonCrdtVerboseVal {
return {
type: 'val',
id: this.cTs(obj.id),
value: this.cNode(obj.node()),
};
}
public cCon(obj: nodes.ConNode): types.JsonCrdtVerboseCon {
const node: types.JsonCrdtVerboseCon = {
type: 'con',
id: this.cTs(obj.id),
};
const val = obj.val;
if (val instanceof Timestamp) {
node.timestamp = true;
node.value = this.cTs(val);
} else {
if (val !== undefined) node.value = val;
}
return node;
}
}
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