json-joy
Version:
Collection of libraries for building collaborative editing apps.
124 lines (123 loc) • 4.74 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.LogEncoder = void 0;
const constants_1 = require("./constants");
class LogEncoder {
constructor(options = {}) {
this.options = options;
}
serialize(log, params = {}) {
if (params.noView && params.model === 'sidecar')
throw new Error('SIDECAR_MODEL_WITHOUT_VIEW');
const metadata = [{}, constants_1.FileModelEncoding.Auto];
let model = null;
const modelFormat = params.model ?? 'sidecar';
switch (modelFormat) {
case 'sidecar': {
metadata[1] = constants_1.FileModelEncoding.SidecarBinary;
const encoder = this.options.sidecarEncoder;
if (!encoder)
throw new Error('NO_SIDECAR_ENCODER');
const [, uint8] = encoder.encode(log.end);
model = uint8;
break;
}
case 'binary': {
model = log.end.toBinary();
break;
}
case 'compact': {
const encoder = this.options.structuralCompactEncoder;
if (!encoder)
throw new Error('NO_COMPACT_ENCODER');
model = encoder.encode(log.end);
break;
}
case 'verbose': {
const encoder = this.options.structuralVerboseEncoder;
if (!encoder)
throw new Error('NO_VERBOSE_ENCODER');
model = encoder.encode(log.end);
break;
}
case 'none': {
model = null;
break;
}
default:
throw new Error(`Invalid model format: ${modelFormat}`);
}
const history = [null, []];
const patchFormat = params.history ?? 'binary';
switch (patchFormat) {
case 'binary': {
history[0] = log.start().toBinary();
// biome-ignore lint: allow .forEach(), for now
log.patches.forEach(({ v }) => {
history[1].push(v.toBinary());
});
break;
}
case 'compact': {
const encoder = this.options.structuralCompactEncoder;
if (!encoder)
throw new Error('NO_COMPACT_ENCODER');
history[0] = encoder.encode(log.start());
const encodeCompact = this.options.patchCompactEncoder;
if (!encodeCompact)
throw new Error('NO_COMPACT_PATCH_ENCODER');
const list = history[1];
// biome-ignore lint: allow .forEach(), for now
log.patches.forEach(({ v }) => {
list.push(encodeCompact(v));
});
break;
}
case 'verbose': {
const encoder = this.options.structuralVerboseEncoder;
if (!encoder)
throw new Error('NO_VERBOSE_ENCODER');
history[0] = encoder.encode(log.start());
const encodeVerbose = this.options.patchVerboseEncoder;
if (!encodeVerbose)
throw new Error('NO_VERBOSE_PATCH_ENCODER');
const list = history[1];
// biome-ignore lint: allow .forEach(), for now
log.patches.forEach(({ v }) => {
list.push(encodeVerbose(v));
});
break;
}
case 'none': {
break;
}
default:
throw new Error(`Invalid history format: ${patchFormat}`);
}
return [params.noView ? null : log.end.view(), metadata, model, history];
}
encode(log, params) {
const sequence = this.serialize(log, params);
switch (params.format) {
case 'ndjson': {
const json = this.options.jsonEncoder;
if (!json)
throw new Error('NO_JSON_ENCODER');
for (const component of sequence) {
json.writeAny(component);
json.writer.u8('\n'.charCodeAt(0));
}
return json.writer.flush();
}
case 'seq.cbor': {
const cbor = this.options.cborEncoder;
if (!cbor)
throw new Error('NO_CBOR_ENCODER');
for (const component of sequence)
cbor.writeAny(component);
return cbor.writer.flush();
}
}
}
}
exports.LogEncoder = LogEncoder;