H-2976: Improve validation for ontology types

libs/@blockprotocol/type-system/rust/src/schema/array/mod.rs

@@ -1,7 +1,9 @@
 mod raw;
+mod validation;
 
 use serde::{Deserialize, Serialize, Serializer};
 
+pub use self::validation::{ArraySchemaValidationError, ArraySchemaValidator};
 use crate::schema::{OneOfSchema, PropertyType, PropertyValues};
 
 #[derive(Debug, Clone, PartialEq, Eq, Deserialize)]

libs/@blockprotocol/type-system/rust/src/schema/array/validation.rs

@@ -0,0 +1,33 @@
+use thiserror::Error;
+
+use crate::{Valid, Validator, schema::PropertyValueArray};
+
+#[derive(Debug, Error)]
+pub enum ArraySchemaValidationError {
+    #[error(
+        "Unsatisfiable item number constraints, expected minimum amount of items ({min}) to be \
+         less than or equal to the maximum amount of items ({max})"
+    )]
+    IncompatibleItemNumberConstraints { min: usize, max: usize },
+}
+
+pub struct ArraySchemaValidator;
+
+impl<T: Sync> Validator<PropertyValueArray<T>> for ArraySchemaValidator {
+    type Error = ArraySchemaValidationError;
+
+    fn validate_ref<'v>(
+        &self,
+        value: &'v PropertyValueArray<T>,
+    ) -> Result<&'v Valid<PropertyValueArray<T>>, Self::Error> {
+        if let Some((min, max)) = value.min_items.zip(value.max_items) {
+            if min > max {
+                return Err(
+                    ArraySchemaValidationError::IncompatibleItemNumberConstraints { min, max },
+                );
+            }
+        }
+
+        Ok(Valid::new_ref_unchecked(value))
+    }
+}

libs/@blockprotocol/type-system/rust/src/schema/data_type/closed.rs

@@ -9,23 +9,13 @@ use serde_json::{Value as JsonValue, json};
 use thiserror::Error;
 
 use crate::{
-    Valid,
     schema::{
         DataType, DataTypeUuid, InheritanceDepth, ValueLabel,
         data_type::{DataTypeEdge, constraint::ValueConstraints},
     },
     url::VersionedUrl,
 };
 
-#[derive(Debug, Clone, Serialize, Deserialize)]
-// #[cfg_attr(target_arch = "wasm32", derive(tsify::Tsify))]
-pub struct ResolvedDataType {
-    #[serde(flatten)]
-    pub schema: Arc<DataType>,
-    #[serde(default, skip_serializing_if = "HashMap::is_empty", rename = "$defs")]
-    pub definitions: HashMap<VersionedUrl, Arc<DataType>>,
-}
-
 #[derive(Debug, Clone, Serialize, Deserialize)]
 #[cfg_attr(target_arch = "wasm32", derive(tsify::Tsify))]
 #[serde(rename_all = "camelCase", deny_unknown_fields)]
@@ -114,14 +104,6 @@ impl ClosedDataType {
     }
 }
 
-impl ResolvedDataType {
-    #[must_use]
-    pub fn data_type(&self) -> &Valid<DataType> {
-        // Valid closed schemas imply that the schema is valid
-        Valid::new_ref_unchecked(&self.schema)
-    }
-}
-
 #[derive(Debug, Default, Clone)]
 pub struct DataTypeResolveData {
     inheritance_depths: HashMap<DataTypeUuid, (InheritanceDepth, Arc<DataType>)>,

libs/@blockprotocol/type-system/rust/src/schema/data_type/mod.rs

@@ -2,7 +2,7 @@ mod constraint;
 mod conversion;
 
 pub use self::{
-    closed::{ClosedDataType, DataTypeResolveData, ResolvedDataType},
+    closed::{ClosedDataType, DataTypeResolveData},
     constraint::{
         AnyOfConstraints, ArrayConstraints, ArraySchema, ArrayTypeTag, ArrayValidationError,
         BooleanSchema, BooleanTypeTag, ConstraintError, ConstraintValidator, NullSchema,

libs/@blockprotocol/type-system/rust/src/schema/data_type/validation.rs

@@ -6,7 +6,7 @@ use thiserror::Error;
 
 use crate::{
     Valid, Validator,
-    schema::{ClosedDataType, DataType, DataTypeReference, ResolvedDataType},
+    schema::{ClosedDataType, DataType, DataTypeReference},
     url::VersionedUrl,
 };
 
@@ -72,44 +72,8 @@ impl Validator<DataType> for DataTypeValidator {
             return Err(ValidateDataTypeError::NonPrimitiveValueInheritance);
         }
 
-        // TODO: Implement validation for data types
-        //   see https://linear.app/hash/issue/H-2976/validate-ontology-types-on-creation
-        Ok(Valid::new_ref_unchecked(value))
-    }
-}
-
-impl Validator<ResolvedDataType> for DataTypeValidator {
-    type Error = ValidateDataTypeError;
-
-    fn validate_ref<'v>(
-        &self,
-        value: &'v ResolvedDataType,
-    ) -> Result<&'v Valid<ResolvedDataType>, Self::Error> {
-        let mut checked_types = HashSet::new();
-        let mut types_to_check = value
-            .schema
-            .data_type_references()
-            .map(|(reference, _)| reference)
-            .collect::<Vec<_>>();
-        while let Some(reference) = types_to_check.pop() {
-            if !checked_types.insert(reference) || reference.url == value.schema.id {
-                continue;
-            }
-
-            let data_type = value.definitions.get(&reference.url).ok_or_else(|| {
-                ValidateDataTypeError::MissingDataType {
-                    data_type_id: reference.url.clone(),
-                }
-            })?;
-            types_to_check.extend(
-                data_type
-                    .data_type_references()
-                    .map(|(reference, _)| reference),
-            );
-        }
-
-        // TODO: Implement validation for data types
-        //   see https://linear.app/hash/issue/H-2976/validate-ontology-types-on-creation
+        // Unsatisfiable constraints will automatically be checked when attempting to close the
+        // schema so it's not needed to check constraints here.
         Ok(Valid::new_ref_unchecked(value))
     }
 }
@@ -121,8 +85,7 @@ impl Validator<ClosedDataType> for DataTypeValidator {
         &self,
         value: &'v ClosedDataType,
     ) -> Result<&'v Valid<ClosedDataType>, Self::Error> {
-        // TODO: Validate ontology types on creation
-        //   see https://linear.app/hash/issue/H-2976/validate-ontology-types-on-creation
+        // Closed data types are validated on creation
         Ok(Valid::new_ref_unchecked(value))
     }
 }

libs/@blockprotocol/type-system/rust/src/schema/entity_type/validation.rs

@@ -17,6 +17,11 @@ pub enum EntityTypeValidationError {
     #[display("Property object validation failed: {_0}")]
     #[from]
     ObjectValidationFailed(ObjectSchemaValidationError),
+    #[display(
+        "Unsatisfiable link number constraints, expected minimum amount of items ({min}) to be \
+         less than or equal to the maximum amount of items ({max})"
+    )]
+    IncompatibleLinkNumberConstraints { min: usize, max: usize },
 }
 
 #[derive(Debug)]
@@ -29,8 +34,6 @@ impl Validator<EntityType> for EntityTypeValidator {
         &self,
         value: &'v EntityType,
     ) -> Result<&'v Valid<EntityType>, Self::Error> {
-        ObjectSchemaValidator.validate_ref(value)?;
-
         for (property, value) in &value.constraints.properties {
             let reference = match value {
                 ValueOrArray::Value(value) => value,
@@ -42,8 +45,16 @@ impl Validator<EntityType> for EntityTypeValidator {
                     reference: reference.clone(),
                 });
             }
-            // TODO: Validate reference
-            //   see https://linear.app/hash/issue/H-3046
+        }
+
+        for links in value.constraints.links.values() {
+            if let Some((min, max)) = links.min_items.zip(links.max_items) {
+                if min > max {
+                    return Err(
+                        EntityTypeValidationError::IncompatibleLinkNumberConstraints { min, max },
+                    );
+                }
+            }
         }
 
         Ok(Valid::new_ref_unchecked(value))
@@ -70,8 +81,16 @@ impl Validator<ClosedEntityType> for EntityTypeValidator {
                     reference: reference.clone(),
                 });
             }
-            // TODO: Validate reference
-            //   see https://linear.app/hash/issue/H-3046
+        }
+
+        for links in value.constraints.links.values() {
+            if let Some((min, max)) = links.min_items.zip(links.max_items) {
+                if min > max {
+                    return Err(
+                        EntityTypeValidationError::IncompatibleLinkNumberConstraints { min, max },
+                    );
+                }
+            }
         }
 
         Ok(Valid::new_ref_unchecked(value))

libs/@blockprotocol/type-system/rust/src/schema/mod.rs

@@ -18,7 +18,10 @@ mod one_of;
 mod identifier;
 
 pub use self::{
-    array::{PropertyArraySchema, PropertyValueArray, ValueOrArray},
+    array::{
+        ArraySchemaValidationError, ArraySchemaValidator, PropertyArraySchema, PropertyValueArray,
+        ValueOrArray,
+    },
     closed_resolver::{InheritanceDepth, OntologyTypeResolver},
     data_type::{
         AnyOfConstraints, ArrayConstraints, ArraySchema, ArrayTypeTag, ArrayValidationError,
@@ -27,9 +30,9 @@ pub use self::{
         DataTypeEdge, DataTypeReference, DataTypeResolveData, DataTypeValidator,
         JsonSchemaValueType, NullSchema, NullTypeTag, NumberConstraints, NumberSchema,
         NumberTypeTag, NumberValidationError, ObjectConstraints, ObjectSchema, ObjectTypeTag,
-        ObjectValidationError, Operator, ResolvedDataType, SingleValueConstraints,
-        SingleValueSchema, StringConstraints, StringFormat, StringFormatError, StringSchema,
-        StringTypeTag, StringValidationError, TupleConstraints, ValidateDataTypeError, ValueLabel,
+        ObjectValidationError, Operator, SingleValueConstraints, SingleValueSchema,
+        StringConstraints, StringFormat, StringFormatError, StringSchema, StringTypeTag,
+        StringValidationError, TupleConstraints, ValidateDataTypeError, ValueLabel,
         ValueSchemaMetadata, Variable,
     },
     domain_validator::{DomainValidationError, DomainValidator, ValidateOntologyType},

libs/@blockprotocol/type-system/rust/src/schema/property_type/validation.rs

@@ -3,6 +3,7 @@ use crate::{
     schema::{
         ObjectSchemaValidationError, ObjectSchemaValidator, OneOfSchemaValidationError,
         OneOfSchemaValidator, PropertyType, PropertyTypeReference, PropertyValues, ValueOrArray,
+        array::{ArraySchemaValidationError, ArraySchemaValidator},
     },
     url::BaseUrl,
 };
@@ -17,6 +18,9 @@ pub enum PropertyTypeValidationError {
     #[display("Property object validation failed: {_0}")]
     #[from]
     ObjectValidationFailed(ObjectSchemaValidationError),
+    #[display("Property array validation failed: {_0}")]
+    #[from]
+    ArrayValidationFailed(ArraySchemaValidationError),
     #[display("OneOf validation failed: {_0}")]
     #[from]
     OneOfValidationFailed(OneOfSchemaValidationError),
@@ -48,25 +52,23 @@ impl Validator<PropertyValues> for PropertyTypeValidator {
         value: &'v PropertyValues,
     ) -> Result<&'v Valid<PropertyValues>, Self::Error> {
         match value {
-            PropertyValues::DataTypeReference(_) => {
-                // TODO: Validate reference
-                //   see https://linear.app/hash/issue/H-3046
-            }
+            PropertyValues::DataTypeReference(_) => {}
             PropertyValues::PropertyTypeObject(object) => {
                 ObjectSchemaValidator.validate_ref(object)?;
                 for (property, value) in &object.properties {
                     let reference = match value {
                         ValueOrArray::Value(value) => value,
-                        ValueOrArray::Array(array) => &array.items,
+                        ValueOrArray::Array(array) => {
+                            ArraySchemaValidator.validate_ref(array)?;
+                            &array.items
+                        }
                     };
                     if *property != reference.url.base_url {
                         return Err(PropertyTypeValidationError::InvalidPropertyReference {
                             base_url: property.clone(),
                             reference: reference.clone(),
                         });
                     }
-                    // TODO: Validate reference
-                    //   see https://linear.app/hash/issue/H-3046
                 }
             }
             PropertyValues::ArrayOfPropertyValues(array) => {