F: Implement substitutions propagation

rsconcept/backend/apps/oss/models/ChangeManager.py

@@ -2,6 +2,7 @@
 from typing import Optional, cast
 
 from cctext import extract_entities
+from rest_framework.serializers import ValidationError
 
 from apps.library.models import LibraryItem
 from apps.rsform.graph import Graph
@@ -16,121 +17,44 @@ from apps.rsform.models import (
 )
 
 from .Inheritance import Inheritance
-from .Operation import Operation
+from .Operation import Operation, OperationType
 from .OperationSchema import OperationSchema
 from .Substitution import Substitution
 
 CstMapping = dict[str, Constituenta]
-
-# TODO: add more variety tests for cascade resolutions model
+CstSubstitution = list[tuple[Constituenta, Constituenta]]
 
 
 class ChangeManager:
-    ''' Change propagation API. '''
-    class Cache:
-        ''' Cache for RSForm constituents. '''
-
-        def __init__(self, oss: OperationSchema):
-            self._oss = oss
-            self._schemas: list[RSForm] = []
-            self._schema_by_id: dict[int, RSForm] = {}
-
-            self.operations = list(oss.operations().only('result_id'))
-            self.operation_by_id = {operation.pk: operation for operation in self.operations}
-            self.graph = Graph[int]()
-            for operation in self.operations:
-                self.graph.add_node(operation.pk)
-            for argument in self._oss.arguments().only('operation_id', 'argument_id'):
-                self.graph.add_edge(argument.argument_id, argument.operation_id)
-
-            self.is_loaded = False
-            self.substitutions: list[Substitution] = []
-            self.inheritance: dict[int, list[tuple[int, int]]] = {}
-
-        def insert(self, schema: RSForm) -> None:
-            ''' Insert new schema. '''
-            if not self._schema_by_id.get(schema.model.pk):
-                self._insert_new(schema)
-
-        def get_schema(self, operation: Operation) -> Optional[RSForm]:
-            ''' Get schema by Operation. '''
-            if operation.result_id is None:
-                return None
-            if operation.result_id in self._schema_by_id:
-                return self._schema_by_id[operation.result_id]
-            else:
-                schema = RSForm.from_id(operation.result_id)
-                schema.cache.ensure_loaded()
-                self._insert_new(schema)
-                return schema
-
-        def get_operation(self, schema: RSForm) -> Operation:
-            ''' Get operation by schema. '''
-            for operation in self.operations:
-                if operation.result_id == schema.model.pk:
-                    return operation
-            raise ValueError(f'Operation for schema {schema.model.pk} not found')
-
-        def ensure_loaded(self) -> None:
-            ''' Ensure propagation of changes. '''
-            if self.is_loaded:
-                return
-            self.is_loaded = True
-            self.substitutions = list(self._oss.substitutions().only('operation_id', 'original_id', 'substitution_id'))
-            for operation in self.operations:
-                self.inheritance[operation.pk] = []
-            for item in self._oss.inheritance().only('operation_id', 'parent_id', 'child_id'):
-                self.inheritance[item.operation_id].append((item.parent_id, item.child_id))
-
-        def get_successor_for(
-            self,
-            parent_cst: int,
-            operation: int,
-            ignore_substitution: bool = False
-        ) -> Optional[int]:
-            ''' Get child for parent inside target RSFrom. '''
-            if not ignore_substitution:
-                for sub in self.substitutions:
-                    if sub.operation_id == operation and sub.original_id == parent_cst:
-                        return sub.substitution_id
-            for item in self.inheritance[operation]:
-                if item[0] == parent_cst:
-                    return item[1]
-            return None
-
-        def insert_inheritance(self, inheritance: Inheritance) -> None:
-            ''' Insert new inheritance. '''
-            self.inheritance[inheritance.operation_id].append((inheritance.parent_id, inheritance.child_id))
-
-        def _insert_new(self, schema: RSForm) -> None:
-            self._schemas.append(schema)
-            self._schema_by_id[schema.model.pk] = schema
-
+    ''' Change propagation wrapper for OSS. '''
 
     def __init__(self, model: LibraryItem):
         self.oss = OperationSchema(model)
-        self.cache = ChangeManager.Cache(self.oss)
+        self.cache = OssCache(self.oss)
 
-
-    def on_create_cst(self, new_cst: Constituenta, source: RSForm) -> None:
+    def after_create_cst(self, cst_list: list[Constituenta], source: RSForm) -> None:
         ''' Trigger cascade resolutions when new constituent is created. '''
         self.cache.insert(source)
-        depend_aliases = new_cst.extract_references()
+        inserted_aliases = [cst.alias for cst in cst_list]
+        depend_aliases: set[str] = set()
+        for new_cst in cst_list:
+            depend_aliases.update(new_cst.extract_references())
+        depend_aliases.difference_update(inserted_aliases)
         alias_mapping: CstMapping = {}
         for alias in depend_aliases:
             cst = source.cache.by_alias.get(alias)
             if cst is not None:
                 alias_mapping[alias] = cst
         operation = self.cache.get_operation(source)
-        self._cascade_create_cst(new_cst, operation, alias_mapping)
+        self._cascade_create_cst(cst_list, operation, alias_mapping)
 
-    def on_change_cst_type(self, target: Constituenta, source: RSForm) -> None:
+    def after_change_cst_type(self, target: Constituenta, source: RSForm) -> None:
         ''' Trigger cascade resolutions when constituenta type is changed. '''
         self.cache.insert(source)
         operation = self.cache.get_operation(source)
         self._cascade_change_cst_type(target.pk, target.cst_type, operation)
 
-    def on_update_cst(self, target: Constituenta, data: dict, old_data: dict, source: RSForm) -> None:
+    def after_update_cst(self, target: Constituenta, data: dict, old_data: dict, source: RSForm) -> None:
         ''' Trigger cascade resolutions when constituenta data is changed. '''
         self.cache.insert(source)
         operation = self.cache.get_operation(source)
@@ -142,7 +66,40 @@ class ChangeManager:
                 alias_mapping[alias] = cst
         self._cascade_update_cst(target.pk, operation, data, old_data, alias_mapping)
 
-    def _cascade_create_cst(self, prototype: Constituenta, operation: Operation, mapping: CstMapping) -> None:
+    def before_delete(self, target: list[Constituenta], source: RSForm) -> None:
+        ''' Trigger cascade resolutions before constituents are deleted. '''
+        self.cache.insert(source)
+        operation = self.cache.get_operation(source)
+        self._cascade_before_delete(target, operation)
+
+    def before_substitute(self, substitutions: CstSubstitution, source: RSForm) -> None:
+        ''' Trigger cascade resolutions before constituents are substituted. '''
+        self.cache.insert(source)
+        operation = self.cache.get_operation(source)
+        self._cascade_before_substitute(substitutions, operation)
+
+    def _cascade_before_substitute(
+        self,
+        substitutions: CstSubstitution,
+        operation: Operation
+    ) -> None:
+        children = self.cache.graph.outputs[operation.pk]
+        if len(children) == 0:
+            return
+        self.cache.ensure_loaded()
+        for child_id in children:
+            child_operation = self.cache.operation_by_id[child_id]
+            child_schema = self.cache.get_schema(child_operation)
+            if child_schema is None:
+                continue
+            child_schema.cache.ensure_loaded()
+            new_substitutions = self._transform_substitutions(substitutions, child_operation, child_schema)
+            if len(new_substitutions) == 0:
+                continue
+            self._cascade_before_substitute(new_substitutions, child_operation)
+            child_schema.substitute(new_substitutions)
+
+    def _cascade_create_cst(self, cst_list: list[Constituenta], operation: Operation, mapping: CstMapping) -> None:
         children = self.cache.graph.outputs[operation.pk]
         if len(children) == 0:
             return
@@ -159,16 +116,17 @@ class ChangeManager:
             self.cache.ensure_loaded()
             new_mapping = self._transform_mapping(mapping, child_operation, child_schema)
             alias_mapping = {alias: cst.alias for alias, cst in new_mapping.items()}
-            insert_where = self._determine_insert_position(prototype, child_operation, source_schema, child_schema)
-            new_cst = child_schema.insert_copy([prototype], insert_where, alias_mapping)[0]
-            new_inheritance = Inheritance.objects.create(
-                operation=child_operation,
-                child=new_cst,
-                parent=prototype
-            )
-            self.cache.insert_inheritance(new_inheritance)
+            insert_where = self._determine_insert_position(cst_list[0], child_operation, source_schema, child_schema)
+            new_cst_list = child_schema.insert_copy(cst_list, insert_where, alias_mapping)
+            for index, cst in enumerate(new_cst_list):
+                new_inheritance = Inheritance.objects.create(
+                    operation=child_operation,
+                    child=cst,
+                    parent=cst_list[index]
+                )
+                self.cache.insert_inheritance(new_inheritance)
             new_mapping = {alias_mapping[alias]: cst for alias, cst in new_mapping.items()}
-            self._cascade_create_cst(new_cst, child_operation, new_mapping)
+            self._cascade_create_cst(new_cst_list, child_operation, new_mapping)
 
     def _cascade_change_cst_type(self, cst_id: int, ctype: CstType, operation: Operation) -> None:
         children = self.cache.graph.outputs[operation.pk]
@@ -177,7 +135,7 @@ class ChangeManager:
         self.cache.ensure_loaded()
         for child_id in children:
             child_operation = self.cache.operation_by_id[child_id]
-            successor_id = self.cache.get_successor_for(cst_id, child_id, ignore_substitution=True)
+            successor_id = self.cache.get_inheritor(cst_id, child_id)
             if successor_id is None:
                 continue
             child_schema = self.cache.get_schema(child_operation)
@@ -197,7 +155,7 @@ class ChangeManager:
         self.cache.ensure_loaded()
         for child_id in children:
             child_operation = self.cache.operation_by_id[child_id]
-            successor_id = self.cache.get_successor_for(cst_id, child_id, ignore_substitution=True)
+            successor_id = self.cache.get_inheritor(cst_id, child_id)
             if successor_id is None:
                 continue
             child_schema = self.cache.get_schema(child_operation)
@@ -216,12 +174,37 @@ class ChangeManager:
             new_mapping = {alias_mapping[alias]: cst for alias, cst in new_mapping.items()}
             self._cascade_update_cst(successor_id, child_operation, new_data, new_old_data, new_mapping)
 
+    def _cascade_before_delete(self, target: list[Constituenta], operation: Operation) -> None:
+        children = self.cache.graph.outputs[operation.pk]
+        if len(children) == 0:
+            return
+        self.cache.ensure_loaded()
+        for child_id in children:
+            child_operation = self.cache.operation_by_id[child_id]
+            child_schema = self.cache.get_schema(child_operation)
+            if child_schema is None:
+                continue
+            child_schema.cache.ensure_loaded()
+
+            # TODO: check if substitutions are affected. Undo substitutions before deletion
+
+            child_target_cst = []
+            child_target_ids = []
+            for cst in target:
+                successor_id = self.cache.get_inheritor(cst.pk, child_id)
+                if successor_id is not None:
+                    child_target_ids.append(successor_id)
+                    child_target_cst.append(child_schema.cache.by_id[successor_id])
+            self._cascade_before_delete(child_target_cst, child_operation)
+            self.cache.remove_cst(child_target_ids, child_id)
+            child_schema.delete_cst(child_target_cst)
+
     def _transform_mapping(self, mapping: CstMapping, operation: Operation, schema: RSForm) -> CstMapping:
         if len(mapping) == 0:
             return mapping
         result: CstMapping = {}
         for alias, cst in mapping.items():
-            successor_id = self.cache.get_successor_for(cst.pk, operation.pk)
+            successor_id = self.cache.get_successor(cst.pk, operation.pk)
             if successor_id is None:
                 continue
             successor = schema.cache.by_id.get(successor_id)
@@ -240,8 +223,7 @@ class ChangeManager:
         if prototype.order == 1:
             return 1
         prev_cst = source.cache.constituents[prototype.order - 2]
-        inherited_prev_id = self.cache.get_successor_for(
-            source.cache.constituents[prototype.order - 2].pk, operation.pk)
+        inherited_prev_id = self.cache.get_successor(prev_cst.pk, operation.pk)
         if inherited_prev_id is None:
             return INSERT_LAST
         prev_cst = destination.cache.by_id[inherited_prev_id]
@@ -277,3 +259,142 @@ class ChangeManager:
             if replace_entities(old_data['definition_raw'], mapping) == cst.definition_raw:
                 new_data['definition_raw'] = replace_entities(data['definition_raw'], mapping)
         return new_data
+
+    def _transform_substitutions(
+        self,
+        target: CstSubstitution,
+        operation: Operation,
+        schema: RSForm
+    ) -> CstSubstitution:
+        result: CstSubstitution = []
+        for current_sub in target:
+            sub_replaced = False
+            new_substitution_id = self.cache.get_inheritor(current_sub[1].pk, operation.pk)
+            if new_substitution_id is None:
+                for sub in self.cache.substitutions[operation.pk]:
+                    if sub.original_id == current_sub[1].pk:
+                        sub_replaced = True
+                        new_substitution_id = self.cache.get_inheritor(sub.original_id, operation.pk)
+                        break
+
+            new_original_id = self.cache.get_inheritor(current_sub[0].pk, operation.pk)
+            original_replaced = False
+            if new_original_id is None:
+                for sub in self.cache.substitutions[operation.pk]:
+                    if sub.original_id == current_sub[0].pk:
+                        original_replaced = True
+                        sub.original_id = current_sub[1].pk
+                        sub.save()
+                        new_original_id = new_substitution_id
+                        new_substitution_id = self.cache.get_inheritor(sub.substitution_id, operation.pk)
+                        break
+
+            if sub_replaced and original_replaced:
+                raise ValidationError({'propagation': 'Substitution breaks OSS substitutions.'})
+
+            for sub in self.cache.substitutions[operation.pk]:
+                if sub.substitution_id == current_sub[0].pk:
+                    sub.substitution_id = current_sub[1].pk
+                    sub.save()
+
+            if new_original_id is not None and new_substitution_id is not None:
+                result.append((schema.cache.by_id[new_original_id], schema.cache.by_id[new_substitution_id]))
+        return result
+
+
+class OssCache:
+    ''' Cache for OSS data. '''
+
+    def __init__(self, oss: OperationSchema):
+        self._oss = oss
+        self._schemas: list[RSForm] = []
+        self._schema_by_id: dict[int, RSForm] = {}
+
+        self.operations = list(oss.operations().only('result_id'))
+        self.operation_by_id = {operation.pk: operation for operation in self.operations}
+        self.graph = Graph[int]()
+        for operation in self.operations:
+            self.graph.add_node(operation.pk)
+        for argument in self._oss.arguments().only('operation_id', 'argument_id'):
+            self.graph.add_edge(argument.argument_id, argument.operation_id)
+
+        self.is_loaded = False
+        self.substitutions: dict[int, list[Substitution]] = {}
+        self.inheritance: dict[int, list[Inheritance]] = {}
+
+    def insert(self, schema: RSForm) -> None:
+        ''' Insert new schema. '''
+        if not self._schema_by_id.get(schema.model.pk):
+            self._insert_new(schema)
+
+    def get_schema(self, operation: Operation) -> Optional[RSForm]:
+        ''' Get schema by Operation. '''
+        if operation.result_id is None:
+            return None
+        if operation.result_id in self._schema_by_id:
+            return self._schema_by_id[operation.result_id]
+        else:
+            schema = RSForm.from_id(operation.result_id)
+            schema.cache.ensure_loaded()
+            self._insert_new(schema)
+            return schema
+
+    def get_operation(self, schema: RSForm) -> Operation:
+        ''' Get operation by schema. '''
+        for operation in self.operations:
+            if operation.result_id == schema.model.pk:
+                return operation
+        raise ValueError(f'Operation for schema {schema.model.pk} not found')
+
+    def ensure_loaded(self) -> None:
+        ''' Ensure propagation of changes. '''
+        if self.is_loaded:
+            return
+        self.is_loaded = True
+        for operation in self.operations:
+            if operation.operation_type != OperationType.INPUT:
+                self.inheritance[operation.pk] = []
+                self.substitutions[operation.pk] = []
+        for sub in self._oss.substitutions().only('operation_id', 'original_id', 'substitution_id'):
+            self.substitutions[sub.operation_id].append(sub)
+        for item in self._oss.inheritance().only('operation_id', 'parent_id', 'child_id'):
+            self.inheritance[item.operation_id].append(item)
+
+    def get_inheritor(self, parent_cst: int, operation: int) -> Optional[int]:
+        ''' Get child for parent inside target RSFrom. '''
+        for item in self.inheritance[operation]:
+            if item.parent_id == parent_cst:
+                return item.child_id
+        return None
+
+    def get_successor(self, parent_cst: int, operation: int) -> Optional[int]:
+        ''' Get child for parent inside target RSFrom including substitutions. '''
+        for sub in self.substitutions[operation]:
+            if sub.original_id == parent_cst:
+                return self.get_inheritor(sub.substitution_id, operation)
+        return self.get_inheritor(parent_cst, operation)
+
+
+    def insert_inheritance(self, inheritance: Inheritance) -> None:
+        ''' Insert new inheritance. '''
+        self.inheritance[inheritance.operation_id].append(inheritance)
+
+    def insert_substitution(self, sub: Substitution) -> None:
+        ''' Insert new inheritance. '''
+        self.substitutions[sub.operation_id].append(sub)
+
+    def remove_cst(self, target: list[int], operation: int) -> None:
+        ''' Remove constituents from operation. '''
+        subs_to_delete = [
+            sub for sub in self.substitutions[operation]
+            if sub.original_id in target or sub.substitution_id in target
+        ]
+        for sub in subs_to_delete:
+            self.substitutions[operation].remove(sub)
+        inherit_to_delete = [item for item in self.inheritance[operation] if item.child_id in target]
+        for item in inherit_to_delete:
+            self.inheritance[operation].remove(item)
+
+    def _insert_new(self, schema: RSForm) -> None:
+        self._schemas.append(schema)
+        self._schema_by_id[schema.model.pk] = schema

rsconcept/backend/apps/oss/models/PropagationFacade.py

@@ -0,0 +1,49 @@
+''' Models: Change propagation facade - managing all changes in OSS. '''
+from apps.library.models import LibraryItem
+from apps.rsform.models import Constituenta, RSForm
+
+from .ChangeManager import ChangeManager
+
+
+def _get_oss_hosts(item: LibraryItem) -> list[LibraryItem]:
+    ''' Get all hosts for LibraryItem. '''
+    return list(LibraryItem.objects.filter(operations__result=item).only('pk'))
+
+
+class PropagationFacade:
+    ''' Change propagation API. '''
+
+    @classmethod
+    def after_create_cst(cls, new_cst: list[Constituenta], source: RSForm) -> None:
+        ''' Trigger cascade resolutions when new constituent is created. '''
+        hosts = _get_oss_hosts(source.model)
+        for host in hosts:
+            ChangeManager(host).after_create_cst(new_cst, source)
+
+    @classmethod
+    def after_change_cst_type(cls, target: Constituenta, source: RSForm) -> None:
+        ''' Trigger cascade resolutions when constituenta type is changed. '''
+        hosts = _get_oss_hosts(source.model)
+        for host in hosts:
+            ChangeManager(host).after_change_cst_type(target, source)
+
+    @classmethod
+    def after_update_cst(cls, target: Constituenta, data: dict, old_data: dict, source: RSForm) -> None:
+        ''' Trigger cascade resolutions when constituenta data is changed. '''
+        hosts = _get_oss_hosts(source.model)
+        for host in hosts:
+            ChangeManager(host).after_update_cst(target, data, old_data, source)
+
+    @classmethod
+    def before_delete(cls, target: list[Constituenta], source: RSForm) -> None:
+        ''' Trigger cascade resolutions before constituents are deleted. '''
+        hosts = _get_oss_hosts(source.model)
+        for host in hosts:
+            ChangeManager(host).before_delete(target, source)
+
+    @classmethod
+    def before_substitute(cls, substitutions: list[tuple[Constituenta, Constituenta]], source: RSForm) -> None:
+        ''' Trigger cascade resolutions before constituents are substituted. '''
+        hosts = _get_oss_hosts(source.model)
+        for host in hosts:
+            ChangeManager(host).before_substitute(substitutions, source)

rsconcept/backend/apps/oss/models/Substitution.py

@@ -29,4 +29,4 @@ class Substitution(Model):
         verbose_name_plural = 'Таблицы отождествлений'
 
     def __str__(self) -> str:
-        return f'{self.original} -> {self.substitution}'
+        return f'{self.substitution} -> {self.original}'

rsconcept/backend/apps/oss/models/__init__.py

@@ -6,3 +6,4 @@ from .Inheritance import Inheritance
 from .Operation import Operation, OperationType
 from .OperationSchema import OperationSchema
 from .Substitution import Substitution
+from .PropagationFacade import PropagationFacade

rsconcept/backend/apps/oss/tests/__init__.py

@@ -1,3 +1,4 @@
 ''' Tests. '''
 from .s_models import *
+from .s_propagation import *
 from .s_views import *

rsconcept/backend/apps/oss/tests/s_models/t_Substitution.py

@@ -52,7 +52,7 @@ class TestSynthesisSubstitution(TestCase):
 
 
     def test_str(self):
-        testStr = f'{self.ks1X1} -> {self.ks2X1}'
+        testStr = f'{self.ks2X1} -> {self.ks1X1}'
         self.assertEqual(str(self.substitution), testStr)
 
 

rsconcept/backend/apps/oss/tests/s_propagation/__init__.py

@@ -0,0 +1,4 @@
+''' Tests for REST API OSS propagation. '''
+from .t_attributes import *
+from .t_constituents import *
+from .t_substitutions import *

rsconcept/backend/apps/oss/tests/s_propagation/t_constituents.py

@@ -57,7 +57,6 @@ class TestChangeConstituents(EndpointTester):
         self.ks3 = RSForm(self.operation3.result)
         self.assertEqual(self.ks3.constituents().count(), 4)
 
-
     @decl_endpoint('/api/rsforms/{schema}/create-cst', method='post')
     def test_create_constituenta(self):
         data = {
@@ -107,3 +106,29 @@ class TestChangeConstituents(EndpointTester):
         self.assertEqual(inherited_cst.term_raw, data['item_data']['term_raw'])
         self.assertEqual(inherited_cst.definition_formal, r'X1\X1')
         self.assertEqual(inherited_cst.definition_raw, r'@{X2|sing,datv}')
+
+    @decl_endpoint('/api/rsforms/{schema}/delete-multiple-cst', method='patch')
+    def test_delete_constituenta(self):
+        data = {'items': [self.ks2X1.pk]}
+        response = self.executeOK(data=data, schema=self.ks2.model.pk)
+        inherited_cst = Constituenta.objects.get(as_child__parent_id=self.ks2D1.pk)
+        self.ks2D1.refresh_from_db()
+        self.assertEqual(self.ks2.constituents().count(), 1)
+        self.assertEqual(self.ks3.constituents().count(), 3)
+        self.assertEqual(self.ks2D1.definition_formal, r'DEL\DEL')
+        self.assertEqual(inherited_cst.definition_formal, r'DEL\DEL')
+
+    @decl_endpoint('/api/rsforms/{schema}/substitute', method='patch')
+    def test_substitute(self):
+        d2 = self.ks3.insert_new('D2', cst_type=CstType.TERM, definition_formal=r'X1\X2\X3')
+        data = {'substitutions': [{
+            'original': self.ks1X1.pk,
+            'substitution': self.ks1X2.pk
+        }]}
+        self.executeOK(data=data, schema=self.ks1.model.pk)
+        self.ks1X2.refresh_from_db()
+        d2.refresh_from_db()
+        self.assertEqual(self.ks1.constituents().count(), 1)
+        self.assertEqual(self.ks3.constituents().count(), 4)
+        self.assertEqual(self.ks1X2.order, 1)
+        self.assertEqual(d2.definition_formal, r'X2\X2\X3')

rsconcept/backend/apps/oss/tests/s_propagation/t_substitutions.py

@@ -0,0 +1,160 @@
+''' Testing API: Change substitutions in OSS. '''
+
+from apps.oss.models import OperationSchema, OperationType
+from apps.rsform.models import Constituenta, CstType, RSForm
+from shared.EndpointTester import EndpointTester, decl_endpoint
+
+
+class TestChangeSubstitutions(EndpointTester):
+    ''' Testing Substitutions change propagation in OSS. '''
+
+    def setUp(self):
+        super().setUp()
+        self.owned = OperationSchema.create(
+            title='Test',
+            alias='T1',
+            owner=self.user
+        )
+        self.owned_id = self.owned.model.pk
+
+        self.ks1 = RSForm.create(
+            alias='KS1',
+            title='Test1',
+            owner=self.user
+        )
+        self.ks1X1 = self.ks1.insert_new('X1', convention='KS1X1')
+        self.ks1X2 = self.ks1.insert_new('X2', convention='KS1X2')
+        self.ks1D1 = self.ks1.insert_new('D1', definition_formal='X1 X2', convention='KS1D1')
+
+        self.ks2 = RSForm.create(
+            alias='KS2',
+            title='Test2',
+            owner=self.user
+        )
+        self.ks2X1 = self.ks2.insert_new('X1', convention='KS2X1')
+        self.ks2X2 = self.ks2.insert_new('X2', convention='KS2X2')
+        self.ks2S1 = self.ks2.insert_new(
+            alias='S1',
+            definition_formal=r'X1',
+            convention='KS2S1'
+        )
+
+        self.ks3 = RSForm.create(
+            alias='KS3',
+            title='Test3',
+            owner=self.user
+        )
+        self.ks3X1 = self.ks3.insert_new('X1', convention='KS3X1')
+        self.ks3D1 = self.ks3.insert_new(
+            alias='D1',
+            definition_formal='X1 X1',
+            convention='KS3D1'
+        )
+
+        self.operation1 = self.owned.create_operation(
+            alias='1',
+            operation_type=OperationType.INPUT,
+            result=self.ks1.model
+        )
+        self.operation2 = self.owned.create_operation(
+            alias='2',
+            operation_type=OperationType.INPUT,
+            result=self.ks2.model
+        )
+        self.operation3 = self.owned.create_operation(
+            alias='3',
+            operation_type=OperationType.INPUT,
+            result=self.ks3.model
+        )
+
+        self.operation4 = self.owned.create_operation(
+            alias='4',
+            operation_type=OperationType.SYNTHESIS
+        )
+        self.owned.set_arguments(self.operation4, [self.operation1, self.operation2])
+        self.owned.set_substitutions(self.operation4, [{
+            'original': self.ks1X1,
+            'substitution': self.ks2S1
+        }])
+        self.owned.execute_operation(self.operation4)
+        self.operation4.refresh_from_db()
+        self.ks4 = RSForm(self.operation4.result)
+        self.ks4X1 = Constituenta.objects.get(as_child__parent_id=self.ks1X2.pk)
+        self.ks4S1 = Constituenta.objects.get(as_child__parent_id=self.ks2S1.pk)
+        self.ks4D1 = Constituenta.objects.get(as_child__parent_id=self.ks1D1.pk)
+        self.ks4D2 = self.ks4.insert_new(
+            alias='D2',
+            definition_formal=r'X1 X2 X3 S1 D1',
+            convention='KS4D2'
+        )
+
+        self.operation5 = self.owned.create_operation(
+            alias='5',
+            operation_type=OperationType.SYNTHESIS
+        )
+        self.owned.set_arguments(self.operation5, [self.operation4, self.operation3])
+        self.owned.set_substitutions(self.operation5, [{
+            'original': self.ks4X1,
+            'substitution': self.ks3X1
+        }])
+        self.owned.execute_operation(self.operation5)
+        self.operation5.refresh_from_db()
+        self.ks5 = RSForm(self.operation5.result)
+        self.ks5D4 = self.ks5.insert_new(
+            alias='D4',
+            definition_formal=r'X1 X2 X3 S1 D1 D2 D3',
+            convention='KS5D4'
+        )
+
+
+    def test_oss_setup(self):
+        self.assertEqual(self.ks1.constituents().count(), 3)
+        self.assertEqual(self.ks2.constituents().count(), 3)
+        self.assertEqual(self.ks3.constituents().count(), 2)
+        self.assertEqual(self.ks4.constituents().count(), 6)
+        self.assertEqual(self.ks5.constituents().count(), 8)
+        self.assertEqual(self.ks4D1.definition_formal, 'S1 X1')
+
+    @decl_endpoint('/api/rsforms/{schema}/substitute', method='patch')
+    def test_substitute_original(self):
+        data = {'substitutions': [{
+            'original': self.ks1X1.pk,
+            'substitution': self.ks1X2.pk
+        }]}
+        self.executeOK(data=data, schema=self.ks1.model.pk)
+        self.ks4D1.refresh_from_db()
+        self.ks4D2.refresh_from_db()
+        self.ks5D4.refresh_from_db()
+        subs1_2 = self.operation4.getSubstitutions()
+        self.assertEqual(subs1_2.count(), 1)
+        self.assertEqual(subs1_2.first().original, self.ks1X2)
+        self.assertEqual(subs1_2.first().substitution, self.ks2S1)
+        subs3_4 = self.operation5.getSubstitutions()
+        self.assertEqual(subs3_4.count(), 1)
+        self.assertEqual(subs3_4.first().original, self.ks4S1)
+        self.assertEqual(subs3_4.first().substitution, self.ks3X1)
+        self.assertEqual(self.ks4D1.definition_formal, r'S1 S1')
+        self.assertEqual(self.ks4D2.definition_formal, r'S1 X2 X3 S1 D1')
+        self.assertEqual(self.ks5D4.definition_formal, r'X1 X2 X3 X1 D1 D2 D3')
+
+    @decl_endpoint('/api/rsforms/{schema}/substitute', method='patch')
+    def test_substitute_substitution(self):
+        data = {'substitutions': [{
+            'original': self.ks2S1.pk,
+            'substitution': self.ks2X1.pk
+        }]}
+        self.executeOK(data=data, schema=self.ks2.model.pk)
+        self.ks4D1.refresh_from_db()
+        self.ks4D2.refresh_from_db()
+        self.ks5D4.refresh_from_db()
+        subs1_2 = self.operation4.getSubstitutions()
+        self.assertEqual(subs1_2.count(), 1)
+        self.assertEqual(subs1_2.first().original, self.ks1X1)
+        self.assertEqual(subs1_2.first().substitution, self.ks2X1)
+        subs3_4 = self.operation5.getSubstitutions()
+        self.assertEqual(subs3_4.count(), 1)
+        self.assertEqual(subs3_4.first().original, self.ks4X1)
+        self.assertEqual(subs3_4.first().substitution, self.ks3X1)
+        self.assertEqual(self.ks4D1.definition_formal, r'X2 X1')
+        self.assertEqual(self.ks4D2.definition_formal, r'X1 X2 X3 X2 D1')
+        self.assertEqual(self.ks5D4.definition_formal, r'X1 X2 X3 X2 D1 D2 D3')

rsconcept/backend/apps/oss/tests/s_views/__init__.py

@@ -1,4 +1,2 @@
 ''' Tests for REST API. '''
-from .t_change_attributes import *
-from .t_change_constituents import *
 from .t_oss import *

rsconcept/backend/apps/rsform/models/RSForm.py

@@ -23,6 +23,7 @@ from .api_RSLanguage import (
 from .Constituenta import Constituenta, CstType, extract_globals
 
 INSERT_LAST: int = -1
+DELETED_ALIAS = 'DEL'
 
 
 class RSForm:
@@ -235,7 +236,7 @@ class RSForm:
             **kwargs
         )
         self.cache.insert(result)
-        self.save()
+        self.save(update_fields=['time_update'])
         return result
 
     def insert_copy(self, items: list[Constituenta], position: int = INSERT_LAST,
@@ -270,7 +271,7 @@ class RSForm:
 
         new_cst = Constituenta.objects.bulk_create(result)
         self.cache.insert_multi(new_cst)
-        self.save()
+        self.save(update_fields=['time_update'])
         return result
 
     # pylint: disable=too-many-branches
@@ -318,7 +319,7 @@ class RSForm:
         cst.save()
         if term_changed:
             self.on_term_change([cst.pk])
-        self.save()
+        self.save(update_fields=['time_update'])
         return old_data
 
     def move_cst(self, target: list[Constituenta], destination: int) -> None:
@@ -344,15 +345,17 @@ class RSForm:
                 cst.order = destination + size + count_bot
                 count_bot += 1
         Constituenta.objects.bulk_update(cst_list, ['order'])
-        self.save()
+        self.save(update_fields=['time_update'])
 
     def delete_cst(self, target: Iterable[Constituenta]) -> None:
         ''' Delete multiple constituents. Do not check if listCst are from this schema. '''
+        mapping = {cst.alias: DELETED_ALIAS for cst in target}
+        self.cache.ensure_loaded()
         self.cache.remove_multi(target)
+        self.apply_mapping(mapping)
         Constituenta.objects.filter(pk__in=[cst.pk for cst in target]).delete()
         self._reset_order()
-        self.resolve_all_text()
-        self.save()
+        self.save(update_fields=['time_update'])
 
     def substitute(self, substitutions: list[tuple[Constituenta, Constituenta]]) -> None:
         ''' Execute constituenta substitution. '''
@@ -360,12 +363,12 @@ class RSForm:
         deleted: list[Constituenta] = []
         replacements: list[Constituenta] = []
         for original, substitution in substitutions:
-            assert original.pk != substitution.pk
             mapping[original.alias] = substitution.alias
             deleted.append(original)
             replacements.append(substitution)
         self.cache.remove_multi(deleted)
         Constituenta.objects.filter(pk__in=[cst.pk for cst in deleted]).delete()
+        self._reset_order()
         self.apply_mapping(mapping)
         self.on_term_change([substitution.pk for substitution in replacements])
 
@@ -414,7 +417,7 @@ class RSForm:
             if cst.apply_mapping(mapping, change_aliases):
                 update_list.append(cst)
         Constituenta.objects.bulk_update(update_list, ['alias', 'definition_formal', 'term_raw', 'definition_raw'])
-        self.save()
+        self.save(update_fields=['time_update'])
 
     def resolve_all_text(self) -> None:
         ''' Trigger reference resolution for all texts. '''
@@ -445,7 +448,7 @@ class RSForm:
             data=data
         )
 
-    def produce_structure(self, target: Constituenta, parse: dict) -> list[int]:
+    def produce_structure(self, target: Constituenta, parse: dict) -> list[Constituenta]:
         ''' Add constituents for each structural element of the target. '''
         expressions = generate_structure(
             alias=target.alias,
@@ -471,12 +474,12 @@ class RSForm:
                 definition_formal=text,
                 cst_type=cst_type
             )
-            result.append(new_item.pk)
+            result.append(new_item)
             free_index = free_index + 1
             position = position + 1
 
-        self.cache.clear()
-        self.save()
+        self.cache.insert_multi(result)
+        self.save(update_fields=['time_update'])
         return result
 
     def _shift_positions(self, start: int, shift: int) -> None:

rsconcept/backend/apps/rsform/models/__init__.py

@@ -1,4 +1,4 @@
 ''' Django: Models. '''
 
 from .Constituenta import Constituenta, CstType, extract_globals, replace_entities, replace_globals
-from .RSForm import INSERT_LAST, RSForm
+from .RSForm import DELETED_ALIAS, INSERT_LAST, RSForm, SemanticInfo

rsconcept/backend/apps/rsform/tests/s_models/t_RSForm.py

@@ -174,6 +174,26 @@ class TestRSForm(DBTester):
         self.assertEqual(s2.definition_raw, '@{X11|plur}')
 
 
+    def test_delete_cst(self):
+        x1 = self.schema.insert_new('X1')
+        x2 = self.schema.insert_new('X2')
+        d1 = self.schema.insert_new(
+            alias='D1',
+            definition_formal='X1 = X2',
+            definition_raw='@{X1|sing}',
+            term_raw='@{X2|plur}'
+        )
+
+        self.schema.delete_cst([x1])
+        x2.refresh_from_db()
+        d1.refresh_from_db()
+        self.assertEqual(self.schema.constituents().count(), 2)
+        self.assertEqual(x2.order, 1)
+        self.assertEqual(d1.order, 2)
+        self.assertEqual(d1.definition_formal, 'DEL = X2')
+        self.assertEqual(d1.definition_raw, '@{DEL|sing}')
+        self.assertEqual(d1.term_raw, '@{X2|plur}')
+
     def test_apply_mapping(self):
         x1 = self.schema.insert_new('X1')
         x2 = self.schema.insert_new('X11')

rsconcept/backend/apps/rsform/views/rsforms.py

@@ -16,7 +16,7 @@ from rest_framework.serializers import ValidationError
 
 from apps.library.models import AccessPolicy, LibraryItem, LibraryItemType, LocationHead
 from apps.library.serializers import LibraryItemSerializer
-from apps.oss.models import ChangeManager
+from apps.oss.models import PropagationFacade
 from apps.users.models import User
 from shared import messages as msg
 from shared import permissions, utility
@@ -84,15 +84,10 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
             insert_after = None
         else:
             insert_after = data['insert_after']
-
         schema = m.RSForm(self._get_item())
         with transaction.atomic():
             new_cst = schema.create_cst(data, insert_after)
-            hosts = LibraryItem.objects.filter(operations__result=schema.model)
-            for host in hosts:
-                ChangeManager(host).on_create_cst(new_cst, schema)
-
-
+            PropagationFacade.after_create_cst([new_cst], schema)
         return Response(
             status=c.HTTP_201_CREATED,
             data={
@@ -118,16 +113,12 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
         model = self._get_item()
         serializer = s.CstUpdateSerializer(data=request.data, partial=True, context={'schema': model})
         serializer.is_valid(raise_exception=True)
-
         cst = cast(m.Constituenta, serializer.validated_data['target'])
         schema = m.RSForm(model)
         data = serializer.validated_data['item_data']
         with transaction.atomic():
-            hosts = LibraryItem.objects.filter(operations__result=model)
             old_data = schema.update_cst(cst, data)
-            for host in hosts:
-                ChangeManager(host).on_update_cst(cst, data, old_data, schema)
-
+            PropagationFacade.after_update_cst(cst, data, old_data, schema)
         return Response(
             status=c.HTTP_200_OK,
             data=s.CstSerializer(m.Constituenta.objects.get(pk=request.data['target'])).data
@@ -164,13 +155,16 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
                 status=c.HTTP_400_BAD_REQUEST,
                 data={f'{cst.pk}': msg.constituentaNoStructure()}
             )
+        schema = m.RSForm(model)
+
         with transaction.atomic():
-            result = m.RSForm(model).produce_structure(cst, cst_parse)
+            new_cst = schema.produce_structure(cst, cst_parse)
+            PropagationFacade.after_create_cst(new_cst, schema)
         return Response(
             status=c.HTTP_200_OK,
             data={
-                'cst_list': result,
-                'schema': s.RSFormParseSerializer(model).data
+                'cst_list': [cst.pk for cst in new_cst],
+                'schema': s.RSFormParseSerializer(schema.model).data
             }
         )
 
@@ -191,28 +185,24 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
         model = self._get_item()
         serializer = s.CstRenameSerializer(data=request.data, context={'schema': model})
         serializer.is_valid(raise_exception=True)
-
         cst = cast(m.Constituenta, serializer.validated_data['target'])
         changed_type = cst.cst_type != serializer.validated_data['cst_type']
         mapping = {cst.alias: serializer.validated_data['alias']}
-        cst.alias = serializer.validated_data['alias']
-        cst.cst_type = serializer.validated_data['cst_type']
         schema = m.RSForm(model)
-
         with transaction.atomic():
+            cst.alias = serializer.validated_data['alias']
+            cst.cst_type = serializer.validated_data['cst_type']
             cst.save()
             schema.apply_mapping(mapping=mapping, change_aliases=False)
+            schema.save()
             cst.refresh_from_db()
             if changed_type:
-                hosts = LibraryItem.objects.filter(operations__result=model)
-                for host in hosts:
-                    ChangeManager(host).on_change_cst_type(cst, schema)
-
+                PropagationFacade.after_change_cst_type(cst, schema)
         return Response(
             status=c.HTTP_200_OK,
             data={
                 'new_cst': s.CstSerializer(cst).data,
-                'schema': s.RSFormParseSerializer(model).data
+                'schema': s.RSFormParseSerializer(schema.model).data
             }
         )
 
@@ -236,19 +226,18 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
             context={'schema': model}
         )
         serializer.is_valid(raise_exception=True)
-
+        schema = m.RSForm(model)
+        substitutions: list[tuple[m.Constituenta, m.Constituenta]] = []
         with transaction.atomic():
-            substitutions: list[tuple[m.Constituenta, m.Constituenta]] = []
             for substitution in serializer.validated_data['substitutions']:
                 original = cast(m.Constituenta, substitution['original'])
                 replacement = cast(m.Constituenta, substitution['substitution'])
                 substitutions.append((original, replacement))
-            m.RSForm(model).substitute(substitutions)
-
-        model.refresh_from_db()
+            PropagationFacade.before_substitute(substitutions, schema)
+            schema.substitute(substitutions)
         return Response(
             status=c.HTTP_200_OK,
-            data=s.RSFormParseSerializer(model).data
+            data=s.RSFormParseSerializer(schema.model).data
         )
 
     @extend_schema(
@@ -271,11 +260,14 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
             context={'schema': model}
         )
         serializer.is_valid(raise_exception=True)
+        cst_list: list[m.Constituenta] = serializer.validated_data['items']
+        schema = m.RSForm(model)
         with transaction.atomic():
-            m.RSForm(model).delete_cst(serializer.validated_data['items'])
+            PropagationFacade.before_delete(cst_list, schema)
+            schema.delete_cst(cst_list)
         return Response(
             status=c.HTTP_200_OK,
-            data=s.RSFormParseSerializer(model).data
+            data=s.RSFormParseSerializer(schema.model).data
         )
 
     @extend_schema(
@@ -322,7 +314,8 @@ class RSFormViewSet(viewsets.GenericViewSet, generics.ListAPIView, generics.Retr
     def reset_aliases(self, request: Request, pk) -> HttpResponse:
         ''' Endpoint: Recreate all aliases based on order. '''
         model = self._get_item()
-        m.RSForm(model).reset_aliases()
+        schema = m.RSForm(model)
+        schema.reset_aliases()
         return Response(
             status=c.HTTP_200_OK,
             data=s.RSFormParseSerializer(model).data
@@ -588,6 +581,8 @@ def inline_synthesis(request: Request) -> HttpResponse:
 
     with transaction.atomic():
         new_items = receiver.insert_copy(items)
+        PropagationFacade.after_create_cst(new_items, receiver)
+
         substitutions: list[tuple[m.Constituenta, m.Constituenta]] = []
         for substitution in serializer.validated_data['substitutions']:
             original = cast(m.Constituenta, substitution['original'])
@@ -600,6 +595,9 @@ def inline_synthesis(request: Request) -> HttpResponse:
                 replacement = new_items[index]
             substitutions.append((original, replacement))
         receiver.substitute(substitutions)
+
+        # TODO: propagate substitutions
+
         receiver.restore_order()
 
     return Response(

rsconcept/frontend/src/components/ui/TextArea.tsx

@@ -24,6 +24,7 @@ function TextArea({
   return (
     <div
       className={clsx(
+        'w-full',
         {
           'flex flex-col gap-2': !dense,
           'flex flex-grow items-center gap-3': dense

rsconcept/frontend/src/components/ui/TextContent.tsx

@@ -0,0 +1,28 @@
+import clsx from 'clsx';
+
+import { globals } from '@/utils/constants';
+import { truncateText } from '@/utils/utils';
+
+import { CProps } from '../props';
+
+export interface TextContentProps extends CProps.Styling {
+  text: string;
+  maxLength?: number;
+}
+
+function TextContent({ className, text, maxLength, ...restProps }: TextContentProps) {
+  const truncated = maxLength ? truncateText(text, maxLength) : text;
+  const isTruncated = maxLength && text.length > maxLength;
+  return (
+    <div
+      className={clsx('text-xs text-pretty', className)}
+      data-tooltip-id={isTruncated ? globals.tooltip : undefined}
+      data-tooltip-content={isTruncated ? text : undefined}
+      {...restProps}
+    >
+      {truncated}
+    </div>
+  );
+}
+
+export default TextContent;

rsconcept/frontend/src/context/ConceptOptionsContext.tsx

@@ -152,7 +152,7 @@ export const OptionsState = ({ children }: OptionsStateProps) => {
           id={`${globals.tooltip}`}
           layer='z-topmost'
           place='right-start'
-          className={clsx('mt-3 translate-y-1/2', 'max-w-[20rem]')}
+          className={clsx('mt-1 translate-y-1/2', 'max-w-[20rem]')}
         />
         {children}
       </>

rsconcept/frontend/src/context/RSFormContext.tsx

@@ -345,6 +345,8 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
           setSchema(newData);
           library.localUpdateTimestamp(newData.id);
           if (callback) callback();
+
+          // TODO: deal with OSS cache invalidation
         }
       });
     },
@@ -414,6 +416,8 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
           setSchema(newData.schema);
           library.localUpdateTimestamp(newData.schema.id);
           if (callback) callback(newData.new_cst);
+
+          // TODO: deal with OSS cache invalidation
         }
       });
     },
@@ -432,6 +436,8 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
           setSchema(newData);
           library.localUpdateTimestamp(newData.id);
           if (callback) callback();
+
+          // TODO: deal with OSS cache invalidation
         }
       });
     },
@@ -450,6 +456,8 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
           reload(setProcessing, () => {
             library.localUpdateTimestamp(Number(itemID));
             if (callback) callback(newData);
+
+            // TODO: deal with OSS cache invalidation
           })
       });
     },
@@ -467,7 +475,11 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
         onSuccess: newData => {
           setSchema(newData.schema);
           library.localUpdateTimestamp(newData.schema.id);
-          if (callback) callback(newData.new_cst);
+          if (library.globalOSS?.schemas.includes(newData.schema.id)) {
+            library.reloadOSS(() => {
+              if (callback) callback(newData.new_cst);
+            });
+          } else if (callback) callback(newData.new_cst);
         }
       });
     },
@@ -485,7 +497,11 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
         onSuccess: newData => {
           setSchema(newData);
           library.localUpdateTimestamp(newData.id);
-          if (callback) callback();
+          if (library.globalOSS?.schemas.includes(newData.id)) {
+            library.reloadOSS(() => {
+              if (callback) callback();
+            });
+          } else if (callback) callback();
         }
       });
     },
@@ -611,6 +627,8 @@ export const RSFormState = ({ itemID, versionID, children }: RSFormStateProps) =
           setSchema(newData);
           library.localUpdateTimestamp(Number(itemID));
           if (callback) callback(newData);
+
+          // TODO: deal with OSS cache invalidation
         }
       });
     },

rsconcept/frontend/src/pages/RSFormPage/EditorRSList/TableRSList.tsx

@@ -7,6 +7,7 @@ import BadgeConstituenta from '@/components/info/BadgeConstituenta';
 import { CProps } from '@/components/props';
 import DataTable, { createColumnHelper, RowSelectionState, VisibilityState } from '@/components/ui/DataTable';
 import NoData from '@/components/ui/NoData';
+import TextContent from '@/components/ui/TextContent';
 import TextURL from '@/components/ui/TextURL';
 import { useConceptOptions } from '@/context/ConceptOptionsContext';
 import useWindowSize from '@/hooks/useWindowSize';
@@ -30,6 +31,9 @@ const COLUMN_DEFINITION_HIDE_THRESHOLD = 1000;
 const COLUMN_TYPE_HIDE_THRESHOLD = 1200;
 const COLUMN_CONVENTION_HIDE_THRESHOLD = 1800;
 
+const COMMENT_MAX_SYMBOLS = 100;
+const DEFINITION_MAX_SYMBOLS = 120;
+
 const columnHelper = createColumnHelper<IConstituenta>();
 
 function TableRSList({
@@ -111,7 +115,7 @@ function TableRSList({
         size: 1000,
         minSize: 200,
         maxSize: 1000,
-        cell: props => <div className='text-xs text-pretty'>{props.getValue()}</div>
+        cell: props => <TextContent text={props.getValue()} maxLength={DEFINITION_MAX_SYMBOLS} />
       }),
       columnHelper.accessor('convention', {
         id: 'convention',
@@ -120,7 +124,7 @@ function TableRSList({
         minSize: 100,
         maxSize: 500,
         enableHiding: true,
-        cell: props => <div className='text-xs text-pretty'>{props.getValue()}</div>
+        cell: props => <TextContent text={props.getValue()} maxLength={COMMENT_MAX_SYMBOLS} />
       })
     ],
     [colors]

rsconcept/frontend/src/utils/utils.ts

@@ -66,6 +66,21 @@ export function applyPattern(text: string, mapping: Record<string, string>, patt
   return output;
 }
 
+/**
+ * Truncate text to max symbols. Add ellipsis if truncated.
+ */
+export function truncateText(text: string, maxSymbols: number): string {
+  if (text.length <= maxSymbols) {
+    return text;
+  }
+  const trimmedText = text.slice(0, maxSymbols);
+  const lastSpaceIndex = trimmedText.lastIndexOf(' ');
+  if (lastSpaceIndex === -1) {
+    return trimmedText + '...';
+  }
+  return trimmedText.slice(0, lastSpaceIndex) + '...';
+}
+
 /**
  * Check if Axios response is html.
  */