1 files changed, 33 insertions, 0 deletions
diff --git a/app/MapPlugin.py b/app/MapPlugin.py
new file mode 100644
index 0000000..abc016b
--- /dev/null
+++ b/app/MapPlugin.py
@@ -0,0 +1,33 @@
+from dataclasses import fields
+from typing import Any
+from app.Item import Item
+from app.PluginInterface import Params, PluginInterface
+from app.utils import get_param
+
+
+def set_field(item: Item, k: str, v: Any):
+    field_names = [f.name for f in fields(Item)]
+    if k not in field_names:
+        raise Exception(f"Invalid set_field key: {k}")
+
+    setattr(item, k, v)
+    return item
+
+
+class Plugin(PluginInterface):
+    def __init__(self, id: str, params: Params) -> None:
+        super().__init__(id, params)
+        self.map_expr: str = get_param("map_expr", params)
+        print(f"[MapItemPlugin#{self.id}] initialized")
+
+    def process(self, source_id: str | None, items: list[Item]) -> list[Item]:
+        print(f"[MapItemPlugin#{self.id}] process called, n={len(items)}")
+        if source_id is None:
+            raise Exception(f"[MapItemPlugin#{self.id}] can not be scheduled")
+
+        expr = f"map(lambda item: {self.map_expr}, input_feed)"
+        print("expr:")
+        print(expr)
+        ret = list(eval(expr, {"input_feed": items, "set_field": set_field}))
+        print(f"[MapItemPlugin#{self.id}] process returning items, n={len(ret)}")
+        return ret