0.3.0-0-pre.5

Web/game-snake-poc/frontend/ts/logging.ts

@@ -0,0 +1,45 @@
+// file: Web/game-snake-poc/frontend/ts/logging.ts
+// version: 1
+
+export type WebLogLevel = "debug" | "info" | "warn" | "error";
+export type WebLogFields = Readonly<Record<string, boolean | number | string | null>>;
+
+type ConsoleMethod = (...items: unknown[]) => void;
+
+function consoleMethod(level: WebLogLevel): ConsoleMethod {
+    if (level === "debug") {
+        return console.debug.bind(console);
+    }
+    if (level === "info") {
+        return console.info.bind(console);
+    }
+    if (level === "warn") {
+        return console.warn.bind(console);
+    }
+    return console.error.bind(console);
+}
+
+function emit(level: WebLogLevel, target: string, action: string, fields: WebLogFields = {}): void {
+    const event = {
+        target,
+        action,
+        ...fields,
+    };
+    consoleMethod(level)(`[games.sasedev][${target}] ${action}`, event);
+}
+
+export function webDebug(target: string, action: string, fields: WebLogFields = {}): void {
+    emit("debug", target, action, fields);
+}
+
+export function webInfo(target: string, action: string, fields: WebLogFields = {}): void {
+    emit("info", target, action, fields);
+}
+
+export function webWarn(target: string, action: string, fields: WebLogFields = {}): void {
+    emit("warn", target, action, fields);
+}
+
+export function webError(target: string, action: string, fields: WebLogFields = {}): void {
+    emit("error", target, action, fields);
+}