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{ ValidationMetadata } from './ValidationMetadata';\nimport { ConstraintMetadata } from './ConstraintMetadata';\nimport { ValidationSchema } from '../validation-schema/ValidationSchema';\nimport { ValidationSchemaToMetadataTransformer } from '../validation-schema/ValidationSchemaToMetadataTransformer';\nimport { getGlobal } from '../utils';\n\n/**\n * Storage all metadatas.\n */\nexport class MetadataStorage {\n // -------------------------------------------------------------------------\n // Private properties\n // -------------------------------------------------------------------------\n\n private validationMetadatas: ValidationMetadata[] = [];\n private constraintMetadatas: ConstraintMetadata[] = [];\n\n get hasValidationMetaData(): boolean {\n return !!this.validationMetadatas.length;\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Adds a new validation metadata.\n */\n addValidationSchema(schema: ValidationSchema): void {\n const validationMetadatas = new ValidationSchemaToMetadataTransformer().transform(schema);\n validationMetadatas.forEach(validationMetadata => this.addValidationMetadata(validationMetadata));\n }\n\n /**\n * Adds a new validation metadata.\n */\n addValidationMetadata(metadata: ValidationMetadata): void {\n this.validationMetadatas.push(metadata);\n }\n\n /**\n * Adds a new constraint metadata.\n */\n addConstraintMetadata(metadata: ConstraintMetadata): void {\n this.constraintMetadatas.push(metadata);\n }\n\n /**\n * Groups metadata by their property names.\n */\n groupByPropertyName(metadata: ValidationMetadata[]): { [propertyName: string]: ValidationMetadata[] } {\n const grouped: { [propertyName: string]: ValidationMetadata[] } = {};\n metadata.forEach(metadata => {\n if (!grouped[metadata.propertyName]) grouped[metadata.propertyName] = [];\n grouped[metadata.propertyName].push(metadata);\n });\n return grouped;\n }\n\n /**\n * Gets all validation metadatas for the given object with the given groups.\n */\n getTargetValidationMetadatas(\n targetConstructor: Function,\n targetSchema: string,\n always: boolean,\n strictGroups: boolean,\n groups?: string[]\n ): ValidationMetadata[] {\n const includeMetadataBecauseOfAlwaysOption = (metadata: ValidationMetadata): boolean => {\n // `metadata.always` overrides global default.\n if (typeof metadata.always !== 'undefined') return metadata.always;\n\n // `metadata.groups` overrides global default.\n if (metadata.groups && metadata.groups.length) return false;\n\n // Use global default.\n return always;\n };\n\n const excludeMetadataBecauseOfStrictGroupsOption = (metadata: ValidationMetadata): boolean => {\n if (strictGroups) {\n // Validation is not using groups.\n if (!groups || !groups.length) {\n // `metadata.groups` has at least one group.\n if (metadata.groups && metadata.groups.length) return true;\n }\n }\n\n return false;\n };\n\n // get directly related to a target metadatas\n const originalMetadatas = this.validationMetadatas.filter(metadata => {\n if (metadata.target !== targetConstructor && metadata.target !== targetSchema) return false;\n if (includeMetadataBecauseOfAlwaysOption(metadata)) return true;\n if (excludeMetadataBecauseOfStrictGroupsOption(metadata)) return false;\n if (groups && groups.length > 0)\n return metadata.groups && !!metadata.groups.find(group => groups.indexOf(group) !== -1);\n\n return true;\n });\n\n // get metadatas for inherited classes\n const inheritedMetadatas = this.validationMetadatas.filter(metadata => {\n // if target is a string it's means we validate against a schema, and there is no inheritance support for schemas\n if (typeof metadata.target === 'string') return false;\n if (metadata.target === targetConstructor) return false;\n if (metadata.target instanceof Function && !(targetConstructor.prototype instanceof metadata.target))\n return false;\n if (includeMetadataBecauseOfAlwaysOption(metadata)) return true;\n if (excludeMetadataBecauseOfStrictGroupsOption(metadata)) return false;\n if (groups && groups.length > 0)\n return metadata.groups && !!metadata.groups.find(group => groups.indexOf(group) !== -1);\n\n return true;\n });\n\n // filter out duplicate metadatas, prefer original metadatas instead of inherited metadatas\n const uniqueInheritedMetadatas = inheritedMetadatas.filter(inheritedMetadata => {\n return !originalMetadatas.find(originalMetadata => {\n return (\n originalMetadata.propertyName === inheritedMetadata.propertyName &&\n originalMetadata.type === inheritedMetadata.type\n );\n });\n });\n\n return originalMetadatas.concat(uniqueInheritedMetadatas);\n }\n\n /**\n * Gets all validator constraints for the given object.\n */\n getTargetValidatorConstraints(target: Function): ConstraintMetadata[] {\n return this.constraintMetadatas.filter(metadata => metadata.target === target);\n }\n}\n\n/**\n * Gets metadata storage.\n * Metadata storage follows the best practices and stores metadata in a global variable.\n */\nexport function getMetadataStorage(): MetadataStorage {\n const global = getGlobal();\n\n if (!global.classValidatorMetadataStorage) {\n global.classValidatorMetadataStorage = new MetadataStorage();\n }\n\n return global.classValidatorMetadataStorage;\n}\n"]} |