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package ast |
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import ( |
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"fmt" |
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) |
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type ( |
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// ReferenceType defines the type of reference. |
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ReferenceType string |
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) |
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const ( |
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UNSPECIFIED ReferenceType = "unspecified" |
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PERMISSION ReferenceType = "permission" |
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RELATION ReferenceType = "relation" |
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ATTRIBUTE ReferenceType = "attribute" |
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ENTITY ReferenceType = "entity" |
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RULE ReferenceType = "rule" |
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) |
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// References - Map of all relational references extracted from the schema |
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type References struct { |
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// Map of entity references extracted from the schema |
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entityReferences map[string]struct{} |
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// Map of rule references extracted from the schema |
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ruleReferences map[string]map[string]string |
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// Map of permission references extracted from the schema |
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// -> ["entity_name#permission_name"] = {} |
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permissionReferences map[string]struct{} |
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// Map of attribute references extracted from the schema |
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// -> ["entity_name#attribute_name"] = "type" |
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attributeReferences map[string]AttributeTypeStatement |
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// Map of relation references extracted from the schema |
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// -> ["entity_name#relation_name"] = []{"type", "type#relation"} |
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relationReferences map[string][]RelationTypeStatement |
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// Map of all relational references extracted from the schema |
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// its include relation, attribute and permission references |
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references map[string]ReferenceType |
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} |
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// NewReferences creates a new instance of References |
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func NewReferences() *References { |
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return &References{ |
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entityReferences: map[string]struct{}{}, |
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ruleReferences: map[string]map[string]string{}, |
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permissionReferences: map[string]struct{}{}, |
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attributeReferences: map[string]AttributeTypeStatement{}, |
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relationReferences: map[string][]RelationTypeStatement{}, |
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references: map[string]ReferenceType{}, |
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} |
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} |
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// AddEntityReference sets a reference for an entity. |
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func (refs *References) AddEntityReference(name string) error { |
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if len(name) == 0 { |
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return fmt.Errorf("name cannot be empty") |
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} |
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if refs.IsReferenceExist(name) { |
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return fmt.Errorf("reference %s already exists", name) |
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} |
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refs.entityReferences[name] = struct{}{} |
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refs.references[name] = ENTITY |
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return nil |
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} |
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// AddRuleReference sets a reference for a rule. |
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func (refs *References) AddRuleReference(name string, types map[string]string) error { |
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if len(name) == 0 { |
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return fmt.Errorf("name cannot be empty") |
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} |
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if refs.IsReferenceExist(name) { |
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return fmt.Errorf("reference %s already exists", name) |
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} |
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refs.ruleReferences[name] = types |
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refs.references[name] = RULE |
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return nil |
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} |
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// AddRelationReferences sets references for a relation with its types. |
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func (refs *References) AddRelationReferences(key string, types []RelationTypeStatement) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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if refs.IsReferenceExist(key) { |
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return fmt.Errorf("reference %s already exists", key) |
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} |
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refs.relationReferences[key] = types |
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refs.references[key] = RELATION |
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return nil |
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} |
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// AddPermissionReference sets a reference for a permission. |
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func (refs *References) AddPermissionReference(key string) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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if refs.IsReferenceExist(key) { |
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return fmt.Errorf("reference %s already exists", key) |
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} |
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refs.permissionReferences[key] = struct{}{} |
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refs.references[key] = PERMISSION |
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return nil |
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} |
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// AddAttributeReferences sets references for an attribute with its type. |
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func (refs *References) AddAttributeReferences(key string, typ AttributeTypeStatement) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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if refs.IsReferenceExist(key) { |
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return fmt.Errorf("reference %s already exists", key) |
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} |
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refs.attributeReferences[key] = typ |
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refs.references[key] = ATTRIBUTE |
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return nil |
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} |
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// UpdateRelationReferences updates the relationship references for a given key. |
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// It replaces the existing relation types with the new ones provided. |
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// If the key is empty, it returns an error. |
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func (refs *References) UpdateRelationReferences(key string, types []RelationTypeStatement) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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refs.relationReferences[key] = types // Update or set the relationship types for the key. |
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refs.references[key] = RELATION // Mark this key as a relation reference. |
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return nil |
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} |
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// UpdatePermissionReference updates the permission references for a given key. |
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// This typically means marking a particular entity or action as permitted. |
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// If the key is empty, it returns an error. |
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func (refs *References) UpdatePermissionReference(key string) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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refs.permissionReferences[key] = struct{}{} // Set the permission flag for the key. |
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refs.references[key] = PERMISSION // Mark this key as a permission reference. |
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return nil |
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} |
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// UpdateAttributeReferences updates the attribute references for a given key. |
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// It associates a specific attribute type with the key. |
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// If the key is empty, it returns an error. |
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func (refs *References) UpdateAttributeReferences(key string, typ AttributeTypeStatement) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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refs.attributeReferences[key] = typ // Set the attribute type for the key. |
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refs.references[key] = ATTRIBUTE // Mark this key as an attribute reference. |
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return nil |
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} |
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// RemoveRelationReferences removes the relationship references associated with a given key. |
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// If the key is empty, it returns an error. |
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func (refs *References) RemoveRelationReferences(key string) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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delete(refs.relationReferences, key) // Remove the relationship reference for the key. |
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delete(refs.references, key) // Remove the general reference. |
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return nil |
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} |
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// RemovePermissionReference removes the permission references associated with a given key. |
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// If the key is empty, it returns an error. |
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func (refs *References) RemovePermissionReference(key string) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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delete(refs.permissionReferences, key) // Remove the permission reference for the key. |
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delete(refs.references, key) // Remove the general reference. |
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return nil |
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} |
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// RemoveAttributeReferences removes the attribute references associated with a given key. |
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// If the key is empty, it returns an error. |
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func (refs *References) RemoveAttributeReferences(key string) error { |
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if len(key) == 0 { |
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return fmt.Errorf("key cannot be empty") |
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} |
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delete(refs.attributeReferences, key) // Remove the attribute reference for the key. |
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delete(refs.references, key) // Remove the general reference. |
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return nil |
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} |
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// GetReferenceType retrieves the type of the reference for a given key. |
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func (refs *References) GetReferenceType(key string) (ReferenceType, bool) { |
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if _, ok := refs.references[key]; ok { |
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return refs.references[key], true |
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} |
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return UNSPECIFIED, false |
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} |
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// IsEntityReferenceExist checks if an entity reference exists for the given name. |
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func (refs *References) IsEntityReferenceExist(name string) bool { |
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if _, ok := refs.entityReferences[name]; ok { |
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return ok |
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} |
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return false |
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} |
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// IsRelationReferenceExist checks if a relation reference exists for the given key. |
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func (refs *References) IsRelationReferenceExist(name string) bool { |
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if _, ok := refs.relationReferences[name]; ok { |
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return true |
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} |
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return false |
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} |
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// IsAttributeReferenceExist checks if an attribute reference exists for the given key. |
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func (refs *References) IsAttributeReferenceExist(name string) bool { |
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if _, ok := refs.attributeReferences[name]; ok { |
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return true |
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} |
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return false |
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} |
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// IsRuleReferenceExist checks if a rule reference exists for the given name. |
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func (refs *References) IsRuleReferenceExist(name string) bool { |
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if _, ok := refs.ruleReferences[name]; ok { |
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return true |
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} |
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return false |
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} |
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// IsReferenceExist checks if a reference exists for the given key. |
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func (refs *References) IsReferenceExist(name string) bool { |
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if _, ok := refs.references[name]; ok { |
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return true |
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} |
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return false |
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} |
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// GetAttributeReferenceTypeIfExist retrieves the attribute type for a given attribute reference key. |
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func (refs *References) GetAttributeReferenceTypeIfExist(name string) (AttributeTypeStatement, bool) { |
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if _, ok := refs.attributeReferences[name]; ok { |
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return refs.attributeReferences[name], true |
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} |
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return AttributeTypeStatement{}, false |
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} |
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// GetRelationReferenceTypesIfExist retrieves the relation types for a given relation reference key. |
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func (refs *References) GetRelationReferenceTypesIfExist(name string) ([]RelationTypeStatement, bool) { |
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if _, ok := refs.relationReferences[name]; ok { |
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return refs.relationReferences[name], true |
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} |
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return nil, false |
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} |
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// GetRuleArgumentTypesIfRuleExist retrieves the rule argument types for a given rule reference key. |
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func (refs *References) GetRuleArgumentTypesIfRuleExist(name string) (map[string]string, bool) { |
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if _, ok := refs.ruleReferences[name]; ok { |
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return refs.ruleReferences[name], true |
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} |
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return map[string]string{}, false |
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} |
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