refactor: replace DataViewMapping with DataModelMapping

Signed-off-by: Oz Tiram <oz.tiram@gmail.com>

src/plette/models/__init__.py

@@ -1,13 +1,13 @@
 __all__ = [
-    "DataView", "DataViewCollection", "DataViewMapping", "DataModelSequence",
-    "validate", "ValidationError",
+    "DataView", "DataModelCollection", "DataModelMapping", "DataModelSequence",
+    "validate", "DataValidationError",
     "Hash", "Package", "Requires", "Source", "Script",
     "Meta", "PackageCollection", "ScriptCollection", "SourceCollection",
 ]
 
 from .base import (
-    DataView, DataViewCollection, DataViewMapping, DataModelSequence,
-    validate, ValidationError,
+    DataView, DataModelCollection, DataModelMapping, DataModelSequence,
+    validate, DataValidationError,
 )
 
 from .hashes import Hash

src/plette/models/base.py

@@ -137,6 +137,7 @@ def items(self):
         return [(k, self[k]) for k in self._data]
 
 
+
 class DataViewSequence(DataViewCollection):
     """A sequence of data views.
 
@@ -268,3 +269,28 @@ def append(self, value):
         if isinstance(value, DataView):
             value = value._data
         self._data.append(value)
+
+
+class DataModelMapping(DataModelCollection):
+    """A mapping of data views.
+
+    The keys are primitive values, while values are instances of `item_class`.
+    """
+
+    @classmethod
+    def validate(cls, data):
+        for d in data.values():
+            cls.item_class.validate(d)
+
+    def __iter__(self):
+        return iter(self._data)
+
+    def keys(self):
+        return self._data.keys()
+
+    def values(self):
+        return [self[k] for k in self._data]
+
+    def items(self):
+        return [(k, self[k]) for k in self._data]
+

src/plette/models/packages.py

@@ -55,4 +55,3 @@ def __setattr__(self, key, value):
             self._data = value
         else:
             self._data[key] = value
-

src/plette/models/sections.py

@@ -1,15 +1,15 @@
-from .base import DataModel, DataViewMapping, DataModelSequence
+from .base import DataModel, DataModelSequence, DataModelMapping
 from .hashes import Hash
 from .packages import Package
 from .scripts import Script
 from .sources import Source
 
 
-class PackageCollection(DataViewMapping):
+class PackageCollection(DataModelMapping):
     item_class = Package
 
 
-class ScriptCollection(DataViewMapping):
+class ScriptCollection(DataModelMapping):
     item_class = Script