Add __contains__ method (#61)

python/pycrdt/array.py

@@ -162,6 +162,9 @@ def __getitem__(self, key: int) -> BaseType:
     def __iter__(self):
         return ArrayIterator(self)
 
+    def __contains__(self, item: Any) -> bool:
+        return item in iter(self)
+
     def __str__(self) -> str:
         with self.doc.transaction() as txn:
             return self.integrated.to_json(txn._txn)

python/pycrdt/map.py

@@ -92,6 +92,9 @@ def __setitem__(self, key: str, value: Any) -> None:
     def __iter__(self):
         return self.keys()
 
+    def __contains__(self, item: str) -> bool:
+        return item in self.keys()
+
     def get(self, key: str, default_value: Any | None = None) -> Any | None:
         with self.doc.transaction():
             if key in self.keys():

python/pycrdt/text.py

@@ -37,6 +37,12 @@ def _init(self, value: str | None) -> None:
     def _get_or_insert(self, name: str, doc: Doc) -> _Text:
         return doc._doc.get_or_insert_text(name)
 
+    def __iter__(self):
+        return TextIterator(self)
+
+    def __contains__(self, item: str) -> bool:
+        return item in str(self)
+
     def __len__(self) -> int:
         with self.doc.transaction() as txn:
             return self.integrated.len(txn._txn)
@@ -129,5 +135,20 @@ class TextEvent(BaseEvent):
     __slots__ = "target", "delta", "path"
 
 
+class TextIterator:
+    def __init__(self, text: Text):
+        self.text = text
+        self.length = len(text)
+        self.idx = 0
+
+    def __next__(self):
+        if self.idx == self.length:
+            raise StopIteration
+
+        res = self.text[self.idx]
+        self.idx += 1
+        return res
+
+
 base_types[_Text] = Text
 event_types[_TextEvent] = TextEvent