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var __defProp = Object.defineProperty, __defNormalProp = (obj, key, value) => key in obj ? __defProp(obj, key, { enumerable: !0, configurable: !0, writable: !0, value }) : obj[key] = value, __publicField = (obj, key, value) => __defNormalProp(obj, typeof key != "symbol" ? key + "" : key, value);
class ParseError extends Error {
constructor(message, options) {
super(message), __publicField(this, "type"), __publicField(this, "field"), __publicField(this, "value"), __publicField(this, "line"), this.name = "ParseError", this.type = options.type, this.field = options.field, this.value = options.value, this.line = options.line;
}
}
function noop(_arg) {
}
function createParser(callbacks) {
const { onEvent = noop, onError = noop, onRetry = noop, onComment } = callbacks;
let incompleteLine = "", isFirstChunk = !0, id, data = "", eventType = "";
function feed(newChunk) {
const chunk = isFirstChunk ? newChunk.replace(/^\xEF\xBB\xBF/, "") : newChunk, [complete, incomplete] = splitLines(`${incompleteLine}${chunk}`);
for (const line of complete)
parseLine(line);
incompleteLine = incomplete, isFirstChunk = !1;
}
function parseLine(line) {
if (line === "") {
dispatchEvent();
return;
}
if (line.startsWith(":")) {
onComment && onComment(line.slice(line.startsWith(": ") ? 2 : 1));
return;
}
const fieldSeparatorIndex = line.indexOf(":");
if (fieldSeparatorIndex !== -1) {
const field = line.slice(0, fieldSeparatorIndex), offset = line[fieldSeparatorIndex + 1] === " " ? 2 : 1, value = line.slice(fieldSeparatorIndex + offset);
processField(field, value, line);
return;
}
processField(line, "", line);
}
function processField(field, value, line) {
switch (field) {
case "event":
eventType = value;
break;
case "data":
data = `${data}${value}
`;
break;
case "id":
id = value.includes("\0") ? void 0 : value;
break;
case "retry":
/^\d+$/.test(value) ? onRetry(parseInt(value, 10)) : onError(
new ParseError(`Invalid \`retry\` value: "${value}"`, {
type: "invalid-retry",
value,
line
})
);
break;
default:
onError(
new ParseError(
`Unknown field "${field.length > 20 ? `${field.slice(0, 20)}\u2026` : field}"`,
{ type: "unknown-field", field, value, line }
)
);
break;
}
}
function dispatchEvent() {
data.length > 0 && onEvent({
id,
event: eventType || void 0,
// If the data buffer's last character is a U+000A LINE FEED (LF) character,
// then remove the last character from the data buffer.
data: data.endsWith(`
`) ? data.slice(0, -1) : data
}), id = void 0, data = "", eventType = "";
}
function reset(options = {}) {
incompleteLine && options.consume && parseLine(incompleteLine), id = void 0, data = "", eventType = "", incompleteLine = "";
}
return { feed, reset };
}
function splitLines(chunk) {
const lines = [];
let incompleteLine = "";
const totalLength = chunk.length;
for (let i = 0; i < totalLength; i++) {
const char = chunk[i];
char === "\r" && chunk[i + 1] === `
` ? (lines.push(incompleteLine), incompleteLine = "", i++) : char === "\r" || char === `
` ? (lines.push(incompleteLine), incompleteLine = "") : incompleteLine += char;
}
return [lines, incompleteLine];
}
export {
ParseError,
createParser
};
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