Add TextLabelManager

backend/api/managers.py

@@ -66,6 +66,16 @@ class SpanManager(AnnotationManager):
         return True
 
 
+class TextLabelManager(AnnotationManager):
+
+    def can_annotate(self, label, project) -> bool:
+        texts = self.get_labels(label, project)
+        for text in texts:
+            if text.is_same_text(label):
+                return False
+        return True
+
+
 class ExampleManager(Manager):
 
     def bulk_create(self, objs, batch_size=None, ignore_conflicts=False):

backend/api/models.py

@@ -9,7 +9,7 @@ from django.db import models
 from polymorphic.models import PolymorphicModel
 
 from .managers import (AnnotationManager, CategoryManager, ExampleManager,
-                       ExampleStateManager, SpanManager)
+                       ExampleStateManager, SpanManager, TextLabelManager)
 
 DOCUMENT_CLASSIFICATION = 'DocumentClassification'
 SEQUENCE_LABELING = 'SequenceLabeling'
@@ -400,6 +400,7 @@ class Span(Annotation):
 
 
 class TextLabel(Annotation):
+    objects = TextLabelManager()
     example = models.ForeignKey(
         to=Example,
         on_delete=models.CASCADE,
@@ -407,6 +408,9 @@ class TextLabel(Annotation):
     )
     text = models.TextField()
 
+    def is_same_text(self, other: 'TextLabel'):
+        return self.text == other.text
+
     class Meta:
         unique_together = (
             'example',

backend/api/tests/test_text_label.py

@@ -0,0 +1,84 @@
+import abc
+
+from django.test import TestCase
+from model_mommy import mommy
+
+from api.models import SEQ2SEQ, TextLabel
+
+from .api.utils import prepare_project
+
+
+class TestTextLabelAnnotation(abc.ABC, TestCase):
+    collaborative = False
+
+    @classmethod
+    def setUpTestData(cls):
+        cls.project = prepare_project(
+            SEQ2SEQ,
+            collaborative_annotation=cls.collaborative
+        )
+        cls.example = mommy.make('Example', project=cls.project.item)
+        users = cls.project.users
+        cls.user = users[0]
+        cls.another_user = users[1]
+        cls.text_label = TextLabel(
+            example=cls.example,
+            user=cls.user,
+            text='foo'
+        )
+
+    def test_can_annotate_category_to_unannotated_data(self):
+        can_annotate = TextLabel.objects.can_annotate(self.text_label, self.project.item)
+        self.assertTrue(can_annotate)
+
+
+class TestNonCollaborativeTextLabelAnnotation(TestTextLabelAnnotation):
+    collaborative = False
+
+    def test_cannot_annotate_same_text_to_annotated_data(self):
+        mommy.make(
+            'TextLabel',
+            example=self.example,
+            user=self.user,
+            text=self.text_label.text
+        )
+        can_annotate = TextLabel.objects.can_annotate(self.text_label, self.project.item)
+        self.assertFalse(can_annotate)
+
+    def test_can_annotate_different_text_to_annotated_data(self):
+        mommy.make('TextLabel', example=self.example, user=self.user)
+        can_annotate = TextLabel.objects.can_annotate(self.text_label, self.project.item)
+        self.assertTrue(can_annotate)
+
+    def test_allow_another_user_to_annotate_same_text(self):
+        mommy.make(
+            'TextLabel',
+            example=self.example,
+            user=self.another_user,
+            text=self.text_label.text
+        )
+        can_annotate = TextLabel.objects.can_annotate(self.text_label, self.project.item)
+        self.assertTrue(can_annotate)
+
+
+class TestCollaborativeTextLabelAnnotation(TestTextLabelAnnotation):
+    collaborative = True
+
+    def test_deny_another_user_to_annotate_same_text(self):
+        mommy.make(
+            'TextLabel',
+            example=self.example,
+            user=self.another_user,
+            text=self.text_label.text
+        )
+        can_annotate = TextLabel.objects.can_annotate(self.text_label, self.project.item)
+        self.assertFalse(can_annotate)
+
+    def test_allow_another_user_to_annotate_different_text(self):
+        mommy.make(
+            'TextLabel',
+            example=self.example,
+            user=self.another_user
+        )
+        can_annotate = TextLabel.objects.can_annotate(self.text_label, self.project.item)
+        self.assertTrue(can_annotate)