🎉 Release BitLogger v0.1.0 core

bitlogger/formatter.mbt

@@ -0,0 +1,43 @@
+fn fields_to_json(fields : Array[Field]) -> Json {
+  let obj : Map[String, Json] = {}
+  for item in fields {
+    obj[item.key] = Json::string(item.value)
+  }
+  Json::object(obj)
+}
+
+fn format_record(rec : Record) -> String {
+  let prefix = if rec.timestamp_ms == 0UL {
+    "[\{rec.level.label()}]"
+  } else {
+    "[\{rec.timestamp_ms.to_string()}] [\{rec.level.label()}]"
+  }
+  let base = if rec.target == "" {
+    "\{prefix} \{rec.message}"
+  } else {
+    "\{prefix} [\{rec.target}] \{rec.message}"
+  }
+  if rec.fields.length() == 0 {
+    base
+  } else {
+    let details = rec.fields.map(fn(f) { "\{f.key}=\{f.value}" }).join(" ")
+    "\{base} \{details}"
+  }
+}
+
+fn format_record_json(rec : Record) -> String {
+  let obj : Map[String, Json] = {
+    "level": Json::string(rec.level.label()),
+    "message": Json::string(rec.message),
+    "fields": fields_to_json(rec.fields),
+  }
+  if rec.timestamp_ms != 0UL {
+    obj["timestamp_ms"] = rec.timestamp_ms.to_json()
+  }
+  if rec.target == "" {
+    Json::object(obj).stringify()
+  } else {
+    obj["target"] = Json::string(rec.target)
+    Json::object(obj).stringify()
+  }
+}