refactor: convert decode history worker to TypeScript
This commit is contained in:
+166
-154
@@ -1,167 +1,179 @@
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"use strict";
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const textDecoder = typeof TextDecoder === "function" ? new TextDecoder() : null;
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const HISTORY_GROUP_KEYS = ["ais", "vdes", "aprs", "hf_aprs", "cw", "ft8", "ft4", "ft2", "wspr", "wefax"];
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function decodeCborUint(view, bytes, state, additional) {
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const offset = state.offset;
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if (additional < 24) return additional;
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if (additional === 24) {
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if (offset + 1 > bytes.length) throw new Error("CBOR payload truncated");
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state.offset += 1;
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return bytes[offset];
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}
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if (additional === 25) {
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if (offset + 2 > bytes.length) throw new Error("CBOR payload truncated");
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state.offset += 2;
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return view.getUint16(offset);
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}
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if (additional === 26) {
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if (offset + 4 > bytes.length) throw new Error("CBOR payload truncated");
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state.offset += 4;
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return view.getUint32(offset);
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}
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if (additional === 27) {
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if (offset + 8 > bytes.length) throw new Error("CBOR payload truncated");
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const value = view.getBigUint64(offset);
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state.offset += 8;
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const numeric = Number(value);
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if (!Number.isSafeInteger(numeric)) throw new Error("CBOR integer exceeds JS safe range");
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return numeric;
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}
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throw new Error("Unsupported CBOR additional info");
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}
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function decodeCborFloat16(bits) {
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const sign = bits & 32768 ? -1 : 1;
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const exponent = bits >> 10 & 31;
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const fraction = bits & 1023;
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if (exponent === 0) {
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return fraction === 0 ? sign * 0 : sign * Math.pow(2, -14) * (fraction / 1024);
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}
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if (exponent === 31) {
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return fraction === 0 ? sign * Infinity : Number.NaN;
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}
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return sign * Math.pow(2, exponent - 15) * (1 + fraction / 1024);
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}
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function decodeCborItem(view, bytes, state) {
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if (state.offset >= bytes.length) throw new Error("CBOR payload truncated");
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const initial = bytes[state.offset++];
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const major = initial >> 5;
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const additional = initial & 31;
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if (major === 0) return decodeCborUint(view, bytes, state, additional);
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if (major === 1) return -1 - decodeCborUint(view, bytes, state, additional);
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if (major === 2) {
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const length = decodeCborUint(view, bytes, state, additional);
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if (state.offset + length > bytes.length) throw new Error("CBOR payload truncated");
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const chunk = bytes.slice(state.offset, state.offset + length);
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state.offset += length;
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return Array.from(chunk);
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}
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if (major === 3) {
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const length = decodeCborUint(view, bytes, state, additional);
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if (state.offset + length > bytes.length) throw new Error("CBOR payload truncated");
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const chunk = bytes.subarray(state.offset, state.offset + length);
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state.offset += length;
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return textDecoder ? textDecoder.decode(chunk) : String.fromCharCode(...chunk);
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}
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if (major === 4) {
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const length = decodeCborUint(view, bytes, state, additional);
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const items = new Array(length);
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for (let i = 0; i < length; i += 1) {
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items[i] = decodeCborItem(view, bytes, state);
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(() => {
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// src/decode-history-worker.ts
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var textDecoder = typeof TextDecoder === "function" ? new TextDecoder() : null;
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var HISTORY_GROUP_KEYS = ["ais", "vdes", "aprs", "hf_aprs", "cw", "ft8", "ft4", "ft2", "wspr", "wefax"];
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var workerScope = self;
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function decodeCborUint(view, bytes, state, additional) {
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const offset = state.offset;
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if (additional < 24) return additional;
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if (additional === 24) {
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if (offset + 1 > bytes.length) throw new Error("CBOR payload truncated");
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state.offset += 1;
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return bytes[offset] ?? 0;
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}
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return items;
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if (additional === 25) {
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if (offset + 2 > bytes.length) throw new Error("CBOR payload truncated");
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state.offset += 2;
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return view.getUint16(offset);
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}
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if (additional === 26) {
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if (offset + 4 > bytes.length) throw new Error("CBOR payload truncated");
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state.offset += 4;
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return view.getUint32(offset);
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}
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if (additional === 27) {
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if (offset + 8 > bytes.length) throw new Error("CBOR payload truncated");
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const value = view.getBigUint64(offset);
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state.offset += 8;
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const numeric = Number(value);
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if (!Number.isSafeInteger(numeric)) throw new Error("CBOR integer exceeds JS safe range");
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return numeric;
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}
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throw new Error("Unsupported CBOR additional info");
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}
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if (major === 5) {
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const length = decodeCborUint(view, bytes, state, additional);
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const value = {};
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for (let i = 0; i < length; i += 1) {
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const key = decodeCborItem(view, bytes, state);
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value[String(key)] = decodeCborItem(view, bytes, state);
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function decodeCborFloat16(bits) {
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const sign = bits & 32768 ? -1 : 1;
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const exponent = bits >> 10 & 31;
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const fraction = bits & 1023;
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if (exponent === 0) {
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return fraction === 0 ? sign * 0 : sign * Math.pow(2, -14) * (fraction / 1024);
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}
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if (exponent === 31) {
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return fraction === 0 ? sign * Infinity : Number.NaN;
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}
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return sign * Math.pow(2, exponent - 15) * (1 + fraction / 1024);
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}
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function decodeCborItem(view, bytes, state) {
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if (state.offset >= bytes.length) throw new Error("CBOR payload truncated");
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const initial = bytes[state.offset++];
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if (initial === void 0) throw new Error("CBOR payload truncated");
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const major = initial >> 5;
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const additional = initial & 31;
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if (major === 0) return decodeCborUint(view, bytes, state, additional);
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if (major === 1) return -1 - decodeCborUint(view, bytes, state, additional);
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if (major === 2) {
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const length = decodeCborUint(view, bytes, state, additional);
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if (state.offset + length > bytes.length) throw new Error("CBOR payload truncated");
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const chunk = bytes.slice(state.offset, state.offset + length);
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state.offset += length;
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return Array.from(chunk);
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}
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if (major === 3) {
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const length = decodeCborUint(view, bytes, state, additional);
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if (state.offset + length > bytes.length) throw new Error("CBOR payload truncated");
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const chunk = bytes.subarray(state.offset, state.offset + length);
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state.offset += length;
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return textDecoder ? textDecoder.decode(chunk) : String.fromCharCode(...chunk);
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}
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if (major === 4) {
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const length = decodeCborUint(view, bytes, state, additional);
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const items = new Array(length);
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for (let i = 0; i < length; i += 1) {
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items[i] = decodeCborItem(view, bytes, state);
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}
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return items;
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}
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if (major === 5) {
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const length = decodeCborUint(view, bytes, state, additional);
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const value = {};
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for (let i = 0; i < length; i += 1) {
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const key = decodeCborItem(view, bytes, state);
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const property = typeof key === "string" || typeof key === "number" || typeof key === "boolean" ? String(key) : JSON.stringify(key);
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value[property] = decodeCborItem(view, bytes, state);
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}
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return value;
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}
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if (major === 6) {
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decodeCborUint(view, bytes, state, additional);
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return decodeCborItem(view, bytes, state);
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}
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if (major === 7) {
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if (additional === 20) return false;
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if (additional === 21) return true;
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if (additional === 22) return null;
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if (additional === 23) return void 0;
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if (additional === 25) {
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if (state.offset + 2 > bytes.length) throw new Error("CBOR payload truncated");
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const bits = view.getUint16(state.offset);
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state.offset += 2;
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return decodeCborFloat16(bits);
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}
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if (additional === 26) {
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if (state.offset + 4 > bytes.length) throw new Error("CBOR payload truncated");
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const value = view.getFloat32(state.offset);
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state.offset += 4;
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return value;
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}
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if (additional === 27) {
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if (state.offset + 8 > bytes.length) throw new Error("CBOR payload truncated");
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const value = view.getFloat64(state.offset);
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state.offset += 8;
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return value;
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}
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}
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throw new Error("Unsupported CBOR major type");
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}
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function decodeCborPayload(buffer) {
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const bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
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const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
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const state = { offset: 0 };
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const value = decodeCborItem(view, bytes, state);
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if (state.offset !== bytes.length) {
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throw new Error("Unexpected trailing bytes in decode history payload");
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}
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return value;
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}
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if (major === 6) {
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decodeCborUint(view, bytes, state, additional);
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return decodeCborItem(view, bytes, state);
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function isHistory(value) {
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return typeof value === "object" && value !== null && !Array.isArray(value);
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}
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if (major === 7) {
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if (additional === 20) return false;
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if (additional === 21) return true;
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if (additional === 22) return null;
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if (additional === 23) return void 0;
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if (additional === 25) {
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if (state.offset + 2 > bytes.length) throw new Error("CBOR payload truncated");
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const bits = view.getUint16(state.offset);
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state.offset += 2;
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return decodeCborFloat16(bits);
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async function fetchAndDecodeHistory(url, batchLimit) {
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workerScope.postMessage({ type: "status", phase: "fetching" });
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const resp = await fetch(url, { credentials: "same-origin" });
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if (!resp.ok) throw new Error(`History fetch failed: ${String(resp.status)}`);
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const payload = await resp.arrayBuffer();
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if (payload.byteLength === 0) {
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workerScope.postMessage({ type: "start", total: 0 });
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workerScope.postMessage({ type: "done", total: 0 });
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return;
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}
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if (additional === 26) {
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if (state.offset + 4 > bytes.length) throw new Error("CBOR payload truncated");
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const value = view.getFloat32(state.offset);
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state.offset += 4;
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return value;
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}
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if (additional === 27) {
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if (state.offset + 8 > bytes.length) throw new Error("CBOR payload truncated");
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const value = view.getFloat64(state.offset);
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state.offset += 8;
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return value;
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workerScope.postMessage({ type: "status", phase: "decoding" });
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const history = decodeCborPayload(payload);
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const total = HISTORY_GROUP_KEYS.reduce((sum, key) => {
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const items = isHistory(history) && Array.isArray(history[key]) ? history[key] : [];
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return sum + items.length;
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}, 0);
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workerScope.postMessage({ type: "start", total });
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let processed = 0;
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const safeLimit = Math.max(1, Math.min(2048, Number(batchLimit) || 512));
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for (const kind of HISTORY_GROUP_KEYS) {
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const items = isHistory(history) && Array.isArray(history[kind]) ? history[kind] : [];
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if (items.length === 0) continue;
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for (let index = 0; index < items.length; index += safeLimit) {
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const messages = items.slice(index, index + safeLimit);
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processed += messages.length;
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workerScope.postMessage({
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type: "group",
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kind,
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messages,
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processed,
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total
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});
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}
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}
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workerScope.postMessage({ type: "done", total });
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}
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throw new Error("Unsupported CBOR major type");
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}
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function decodeCborPayload(buffer) {
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const bytes = buffer instanceof Uint8Array ? buffer : new Uint8Array(buffer);
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const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
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const state = { offset: 0 };
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const value = decodeCborItem(view, bytes, state);
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if (state.offset !== bytes.length) {
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throw new Error("Unexpected trailing bytes in decode history payload");
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function isFetchHistoryRequest(value) {
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return typeof value === "object" && value !== null && "type" in value && value.type === "fetch-history";
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}
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return value;
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}
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async function fetchAndDecodeHistory(url, batchLimit) {
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self.postMessage({ type: "status", phase: "fetching" });
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const resp = await fetch(url, { credentials: "same-origin" });
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if (!resp.ok) throw new Error(`History fetch failed: ${resp.status}`);
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const payload = await resp.arrayBuffer();
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if (!payload || payload.byteLength === 0) {
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self.postMessage({ type: "start", total: 0 });
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self.postMessage({ type: "done", total: 0 });
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return;
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}
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self.postMessage({ type: "status", phase: "decoding" });
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const history = decodeCborPayload(payload);
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const total = HISTORY_GROUP_KEYS.reduce((sum, key) => {
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const items = history && Array.isArray(history[key]) ? history[key] : [];
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return sum + items.length;
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}, 0);
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self.postMessage({ type: "start", total });
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let processed = 0;
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const safeLimit = Math.max(1, Math.min(2048, Number(batchLimit) || 512));
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for (const kind of HISTORY_GROUP_KEYS) {
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const items = history && Array.isArray(history[kind]) ? history[kind] : [];
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if (items.length === 0) continue;
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for (let index = 0; index < items.length; index += safeLimit) {
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const messages = items.slice(index, index + safeLimit);
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processed += messages.length;
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self.postMessage({
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type: "group",
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kind,
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messages,
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processed,
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total
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workerScope.onmessage = (event) => {
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const data = event.data;
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if (!isFetchHistoryRequest(data)) return;
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fetchAndDecodeHistory(data.url || "/decode/history", data.batchLimit).catch((error) => {
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workerScope.postMessage({
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type: "error",
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message: error instanceof Error ? error.message : typeof error === "string" ? error : "unknown worker failure"
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});
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}
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}
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self.postMessage({ type: "done", total });
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}
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self.onmessage = (event) => {
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const data = event?.data || {};
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if (data?.type !== "fetch-history") return;
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fetchAndDecodeHistory(data.url || "/decode/history", data.batchLimit).catch((err) => {
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self.postMessage({
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type: "error",
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message: err && err.message ? err.message : String(err || "unknown worker failure")
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});
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});
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};
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};
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})();
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