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import { decodeEvent } from "./events";
export type ConsoleLevel = "log" | "info" | "warn" | "error" | "debug";
export type ConsoleRecord = {
seq: number;
timestampMs: number;
level: ConsoleLevel;
text: string;
source: "console-api" | "log-entry";
url?: string;
lineNumber?: number;
stackTrace?: string;
};
export type ConsoleFilter = {
levels?: ConsoleLevel[];
textPattern?: string;
sinceSeq?: number;
sinceMs?: number;
limit?: number;
};
export type ConsoleDrainResult = {
readonly records: ConsoleRecord[];
readonly total: number;
readonly bufferOverflowed: boolean;
};
export type ConsoleBuffer = {
ingestConsoleApi(p: unknown): void;
ingestLogEntry(p: unknown): void;
drain(filter: ConsoleFilter): ConsoleDrainResult;
clear(): void;
};
const PER_ARG_CAP = 2000;
const MAX_STACK_FRAMES = 3;
const compileTextMatcher = (pattern: string): ((text: string) => boolean) => {
if (pattern.length >= 2 && pattern.startsWith("/") && pattern.endsWith("/")) {
try {
const re = new RegExp(pattern.slice(1, -1));
return (text) => re.test(text);
} catch {
}
}
return (text) => text.includes(pattern);
};
const truncateArg = (s: string): string =>
s.length > PER_ARG_CAP ? s.slice(0, PER_ARG_CAP) + "…" : s;
const stringifyRemoteObject = (
arg: { type?: string; subtype?: string; value?: unknown; description?: string; unserializableValue?: string },
): string => {
if (arg.unserializableValue !== undefined) return arg.unserializableValue;
if (arg.value !== undefined) {
if (typeof arg.value === "string") return arg.value;
try {
return JSON.stringify(arg.value);
} catch {
return String(arg.value);
}
}
if (arg.description !== undefined) return arg.description;
return arg.type ?? "";
};
const mapConsoleApiLevel = (type: string | undefined): ConsoleLevel => {
switch (type) {
case "error":
case "assert":
return "error";
case "warning":
return "warn";
case "debug":
case "trace":
return "debug";
case "info":
return "info";
default:
return "log";
}
};
const mapLogEntryLevel = (level: string | undefined): ConsoleLevel => {
switch (level) {
case "error":
return "error";
case "warning":
return "warn";
case "verbose":
return "debug";
default:
return "info";
}
};
const formatStackTrace = (
st: { callFrames?: ReadonlyArray<{ url?: string; lineNumber?: number; functionName?: string }> } | undefined,
): string | undefined => {
const frames = st?.callFrames;
if (!frames || frames.length === 0) return undefined;
const top = frames.slice(0, MAX_STACK_FRAMES);
const rendered = top.map((f) => {
const fn = f.functionName !== undefined && f.functionName !== "" ? f.functionName : "<anonymous>";
const loc = f.url !== undefined && f.url !== "" ? `${f.url}:${(f.lineNumber ?? 0) + 1}` : "<unknown>";
return ` at ${fn} (${loc})`;
});
return rendered.join("\n");
};
export const createConsoleBuffer = (capacity = 500): ConsoleBuffer => {
const records = new Map<number, ConsoleRecord>();
let nextSeq = 1;
let overflowed = false;
const evictOldestIfFull = (): void => {
while (records.size >= capacity) {
const oldest = records.keys().next();
if (oldest.done) return;
records.delete(oldest.value);
overflowed = true;
}
};
const insert = (rec: ConsoleRecord): void => {
evictOldestIfFull();
records.set(rec.seq, rec);
};
return {
ingestConsoleApi(p) {
const decoded = decodeEvent("Runtime.consoleAPICalled", p);
if (!decoded.success) return;
const params = decoded.data;
const level = mapConsoleApiLevel(params.type);
const argTexts = (params.args ?? []).map((a) => truncateArg(stringifyRemoteObject(a)));
const text = argTexts.join(" ");
const stack = level === "error" || level === "warn" ? formatStackTrace(params.stackTrace) : undefined;
const top = params.stackTrace?.callFrames?.[0];
const rec: ConsoleRecord = {
seq: nextSeq++,
timestampMs: Date.now(),
level,
text,
source: "console-api",
...(top?.url !== undefined && top.url !== "" ? { url: top.url } : {}),
...(top?.lineNumber !== undefined ? { lineNumber: top.lineNumber + 1 } : {}),
...(stack !== undefined ? { stackTrace: stack } : {}),
};
insert(rec);
},
ingestLogEntry(p) {
const decoded = decodeEvent("Log.entryAdded", p);
const entry = decoded.success ? decoded.data.entry : undefined;
if (!entry) return;
const level = mapLogEntryLevel(entry.level);
const text = truncateArg(entry.text ?? "");
const stack = level === "error" || level === "warn" ? formatStackTrace(entry.stackTrace) : undefined;
const rec: ConsoleRecord = {
seq: nextSeq++,
timestampMs: Date.now(),
level,
text,
source: "log-entry",
...(entry.url !== undefined && entry.url !== "" ? { url: entry.url } : {}),
...(entry.lineNumber !== undefined ? { lineNumber: entry.lineNumber + 1 } : {}),
...(stack !== undefined ? { stackTrace: stack } : {}),
};
insert(rec);
},
drain(filter) {
const matchText = filter.textPattern !== undefined ? compileTextMatcher(filter.textPattern) : undefined;
const levels = filter.levels && filter.levels.length > 0 ? new Set(filter.levels) : undefined;
const cutoff = filter.sinceMs !== undefined ? Date.now() - filter.sinceMs : undefined;
const sinceSeq = filter.sinceSeq;
const matched: ConsoleRecord[] = [];
for (const r of records.values()) {
if (sinceSeq !== undefined && r.seq <= sinceSeq) continue;
if (levels && !levels.has(r.level)) continue;
if (cutoff !== undefined && r.timestampMs < cutoff) continue;
if (matchText && !matchText(r.text)) continue;
matched.push({ ...r });
}
const total = matched.length;
const limit = Math.min(filter.limit ?? 50, 500);
const limited = matched.slice(-limit);
const bufferOverflowed = overflowed;
overflowed = false;
return { records: limited, total, bufferOverflowed };
},
clear() {
records.clear();
nextSeq = 1;
overflowed = false;
},
};
};
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