64 lines
1.7 KiB
TypeScript
64 lines
1.7 KiB
TypeScript
export type ParsedLogLine = {
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time?: string;
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level?: string;
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subsystem?: string;
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module?: string;
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message: string;
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raw: string;
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};
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function extractMessage(value: Record<string, unknown>): string {
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const parts: string[] = [];
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for (const key of Object.keys(value)) {
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if (!/^\d+$/.test(key)) {
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continue;
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}
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const item = value[key];
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if (typeof item === "string") {
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parts.push(item);
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} else if (item != null) {
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parts.push(JSON.stringify(item));
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}
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}
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return parts.join(" ");
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}
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function parseMetaName(raw?: unknown): { subsystem?: string; module?: string } {
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if (typeof raw !== "string") {
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return {};
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}
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try {
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const parsed = JSON.parse(raw) as Record<string, unknown>;
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return {
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subsystem: typeof parsed.subsystem === "string" ? parsed.subsystem : undefined,
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module: typeof parsed.module === "string" ? parsed.module : undefined,
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};
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} catch {
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return {};
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}
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}
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export function parseLogLine(raw: string): ParsedLogLine | null {
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try {
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const parsed = JSON.parse(raw) as Record<string, unknown>;
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const meta = parsed._meta as Record<string, unknown> | undefined;
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const nameMeta = parseMetaName(meta?.name);
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const levelRaw = typeof meta?.logLevelName === "string" ? meta.logLevelName : undefined;
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return {
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time:
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typeof parsed.time === "string"
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? parsed.time
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: typeof meta?.date === "string"
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? meta.date
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: undefined,
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level: levelRaw ? levelRaw.toLowerCase() : undefined,
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subsystem: nameMeta.subsystem,
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module: nameMeta.module,
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message: extractMessage(parsed),
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raw,
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};
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} catch {
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return null;
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}
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}
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