awscdk-construct-scte-scheduler
Version:
AWS CDK Construct for scheduling SCTE-35 events using the MediaLive schedule API
106 lines (105 loc) • 4.39 kB
JavaScript
import { NormalizedSchema, SCHEMA } from "@smithy/core/schema";
import { LazyJsonString, NumericValue, parseEpochTimestamp, parseRfc3339DateTimeWithOffset, parseRfc7231DateTime, } from "@smithy/core/serde";
import { fromBase64 } from "@smithy/util-base64";
import { SerdeContextConfig } from "../ConfigurableSerdeContext";
import { jsonReviver } from "./jsonReviver";
import { parseJsonBody } from "./parseJsonBody";
export class JsonShapeDeserializer extends SerdeContextConfig {
settings;
constructor(settings) {
super();
this.settings = settings;
}
async read(schema, data) {
return this._read(schema, typeof data === "string" ? JSON.parse(data, jsonReviver) : await parseJsonBody(data, this.serdeContext));
}
readObject(schema, data) {
return this._read(schema, data);
}
_read(schema, value) {
const isObject = value !== null && typeof value === "object";
const ns = NormalizedSchema.of(schema);
if (ns.isListSchema() && Array.isArray(value)) {
const listMember = ns.getValueSchema();
const out = [];
const sparse = !!ns.getMergedTraits().sparse;
for (const item of value) {
if (sparse || item != null) {
out.push(this._read(listMember, item));
}
}
return out;
}
else if (ns.isMapSchema() && isObject) {
const mapMember = ns.getValueSchema();
const out = {};
const sparse = !!ns.getMergedTraits().sparse;
for (const [_k, _v] of Object.entries(value)) {
if (sparse || _v != null) {
out[_k] = this._read(mapMember, _v);
}
}
return out;
}
else if (ns.isStructSchema() && isObject) {
const out = {};
for (const [memberName, memberSchema] of ns.structIterator()) {
const fromKey = this.settings.jsonName ? memberSchema.getMergedTraits().jsonName ?? memberName : memberName;
const deserializedValue = this._read(memberSchema, value[fromKey]);
if (deserializedValue != null) {
out[memberName] = deserializedValue;
}
}
return out;
}
if (ns.isBlobSchema() && typeof value === "string") {
return fromBase64(value);
}
const mediaType = ns.getMergedTraits().mediaType;
if (ns.isStringSchema() && typeof value === "string" && mediaType) {
const isJson = mediaType === "application/json" || mediaType.endsWith("+json");
if (isJson) {
return LazyJsonString.from(value);
}
}
if (ns.isTimestampSchema()) {
const options = this.settings.timestampFormat;
const format = options.useTrait
? ns.getSchema() === SCHEMA.TIMESTAMP_DEFAULT
? options.default
: ns.getSchema() ?? options.default
: options.default;
switch (format) {
case SCHEMA.TIMESTAMP_DATE_TIME:
return parseRfc3339DateTimeWithOffset(value);
case SCHEMA.TIMESTAMP_HTTP_DATE:
return parseRfc7231DateTime(value);
case SCHEMA.TIMESTAMP_EPOCH_SECONDS:
return parseEpochTimestamp(value);
default:
console.warn("Missing timestamp format, parsing value with Date constructor:", value);
return new Date(value);
}
}
if (ns.isBigIntegerSchema() && (typeof value === "number" || typeof value === "string")) {
return BigInt(value);
}
if (ns.isBigDecimalSchema() && value != undefined) {
if (value instanceof NumericValue) {
return value;
}
return new NumericValue(String(value), "bigDecimal");
}
if (ns.isNumericSchema() && typeof value === "string") {
switch (value) {
case "Infinity":
return Infinity;
case "-Infinity":
return -Infinity;
case "NaN":
return NaN;
}
}
return value;
}
}