♻️ Extract sink models into utils subpackage

src/utils/sink_models.mbt

@@ -0,0 +1,66 @@
+pub struct FileRotation {
+  max_bytes : Int
+  max_backups : Int
+}
+
+pub struct FileSinkState {
+  path : String
+  available : Bool
+  append : Bool
+  auto_flush : Bool
+  rotation : FileRotation?
+  open_failures : Int
+  write_failures : Int
+  flush_failures : Int
+  rotation_failures : Int
+}
+
+pub struct FileSinkPolicy {
+  append : Bool
+  auto_flush : Bool
+  rotation : FileRotation?
+}
+
+pub fn FileSinkPolicy::new(
+  append~ : Bool = true,
+  auto_flush~ : Bool = true,
+  rotation~ : FileRotation? = None,
+) -> FileSinkPolicy {
+  { append, auto_flush, rotation }
+}
+
+pub fn FileSinkState::new(
+  path : String,
+  available~ : Bool = false,
+  append~ : Bool = true,
+  auto_flush~ : Bool = true,
+  rotation~ : FileRotation? = None,
+  open_failures~ : Int = 0,
+  write_failures~ : Int = 0,
+  flush_failures~ : Int = 0,
+  rotation_failures~ : Int = 0,
+) -> FileSinkState {
+  {
+    path,
+    available,
+    append,
+    auto_flush,
+    rotation,
+    open_failures,
+    write_failures,
+    flush_failures,
+    rotation_failures,
+  }
+}
+
+pub fn file_rotation(max_bytes : Int, max_backups~ : Int = 1) -> FileRotation {
+  {
+    max_bytes: if max_bytes <= 0 { 1 } else { max_bytes },
+    max_backups: if max_backups <= 0 { 1 } else { max_backups },
+  }
+}
+
+pub(all) enum QueueOverflowPolicy {
+  DropNewest
+  DropOldest
+}