computed-types
Version:
Runtime validation types for TypeScript.
127 lines (103 loc) • 13.5 kB
JavaScript
;
exports.__esModule = true;
exports.default = compiler;
var _errors = require("./errors");
var _validations = require("./validations");
var _utils = require("./utils");
function compiler(schema, opts) {
const {
error,
basePath = [],
strict
} = opts || {};
if (typeof schema === 'function') {
return schema;
}
if (typeof schema !== 'object' || schema === null) {
return (0, _validations.equals)(schema, error);
}
if (schema instanceof RegExp) {
return (0, _validations.regexp)(schema, error);
}
let typeValidator;
if (Array.isArray(schema)) {
const validator = (0, _validations.array)(schema.length, error);
typeValidator = (...args) => {
return [validator(...args), []];
};
} else {
const validator = (0, _validations.type)('object', error);
typeValidator = (...args) => {
return [validator(...args), {}];
};
}
const keys = Object.keys(schema);
const tasks = keys.map(key => {
const path = [...basePath, key];
const validator = compiler(schema[key], {
basePath,
strict
});
return (res, errors, obj) => {
try {
const value = validator(obj[key]);
if (!(0, _utils.isPromiseLike)(value)) {
res[key] = value;
return;
}
return value.then(value => {
res[key] = value;
}, error => {
errors.push(...(0, _errors.toPathErrors)(error, path));
});
} catch (error) {
errors.push(...(0, _errors.toPathErrors)(error, path));
}
};
});
if (strict) {
const keysSet = new Set(keys);
tasks.push((res, errors, obj) => {
Object.keys(obj).forEach(key => {
if (keysSet.has(key)) return;
errors.push({
path: [...basePath, key],
error: (0, _errors.toError)(`Unknown property "${key}"`)
});
});
});
}
const tasksCount = tasks.length;
return (...args) => {
// eslint-disable-next-line @typescript-eslint/ban-types
let obj;
let res;
let mainError;
try {
[obj, res] = typeValidator(...args);
} catch (e) {
obj = {};
res = {};
mainError = e;
}
const promises = [];
const errors = [];
for (let i = 0; i < tasksCount; i += 1) {
const promise = tasks[i](res, errors, obj);
if (promise) promises.push(promise);
}
if (!promises.length) {
if (errors.length || mainError) {
throw (0, _errors.createValidationError)(errors, mainError || error, ...args);
}
return res;
}
return Promise.all(promises).then(() => {
if (errors.length || mainError) {
throw (0, _errors.createValidationError)(errors, mainError || error, ...args);
}
return res;
});
};
}
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{\n  SchemaParameters,\n  SchemaResolveType,\n  SchemaValidatorFunction,\n} from './io';\nimport {\n  createValidationError,\n  ErrorLike,\n  ObjectPath,\n  toError,\n  toPathErrors,\n} from './errors';\nimport { array, equals, regexp, type } from './validations';\nimport FunctionType from './FunctionType';\nimport { isPromiseLike } from './utils';\nimport { PathError } from './errors';\n\ntype SchemaKeyTask = (\n  res: Record<string, unknown>,\n  errors: PathError[],\n  // eslint-disable-next-line @typescript-eslint/ban-types\n  obj: object,\n) => void | PromiseLike<void>;\n\nexport default function compiler<S>(\n  schema: S,\n  opts?: {\n    error?: ErrorLike<SchemaParameters<S>>;\n    basePath?: ObjectPath;\n    strict?: boolean;\n  },\n): SchemaValidatorFunction<S> {\n  const { error, basePath = [], strict } = opts || {};\n\n  if (typeof schema === 'function') {\n    return schema as unknown as SchemaValidatorFunction<S>;\n  }\n\n  if (typeof schema !== 'object' || schema === null) {\n    return equals(schema, error) as SchemaValidatorFunction<S>;\n  }\n\n  if (schema instanceof RegExp) {\n    return regexp(schema, error) as SchemaValidatorFunction<S>;\n  }\n\n  let typeValidator: FunctionType<\n    // eslint-disable-next-line @typescript-eslint/ban-types\n    [object, Record<string, unknown>],\n    SchemaParameters<S>\n  >;\n\n  if (Array.isArray(schema)) {\n    const validator = array(schema.length, error);\n\n    typeValidator = (\n      ...args: SchemaParameters<S>\n    ): // eslint-disable-next-line @typescript-eslint/ban-types\n    [object, Record<string, unknown>] => {\n      return [validator(...args), [] as unknown as Record<string, unknown>];\n    };\n  } else {\n    const validator = type('object', error);\n\n    typeValidator = (\n      ...args: SchemaParameters<S>\n    ): // eslint-disable-next-line @typescript-eslint/ban-types\n    [object, Record<string, unknown>] => {\n      return [validator(...args), {}];\n    };\n  }\n\n  const keys = Object.keys(schema);\n\n  const tasks = keys.map((key): SchemaKeyTask => {\n    const path = [...basePath, key];\n    const validator = compiler<unknown>(schema[key as keyof S], {\n      basePath,\n      strict,\n    });\n\n    return (res, errors, obj): void | PromiseLike<void> => {\n      try {\n        const value: unknown = validator(\n          (obj as { [key: string]: unknown })[key],\n        );\n\n        if (!isPromiseLike(value)) {\n          res[key] = value;\n          return;\n        }\n\n        return value.then(\n          (value) => {\n            res[key] = value;\n          },\n          (error) => {\n            errors.push(...toPathErrors(error, path));\n          },\n        );\n      } catch (error) {\n        errors.push(...toPathErrors(error as Error, path));\n      }\n    };\n  });\n\n  if (strict) {\n    const keysSet = new Set(keys);\n\n    tasks.push((res, errors, obj): void => {\n      Object.keys(obj).forEach((key) => {\n        if (keysSet.has(key)) return;\n\n        errors.push({\n          path: [...basePath, key],\n          error: toError(`Unknown property \"${key}\"`),\n        });\n      });\n    });\n  }\n\n  const tasksCount = tasks.length;\n\n  return ((\n    ...args: SchemaParameters<S>\n  ): SchemaResolveType<S> | Promise<SchemaResolveType<S>> => {\n    // eslint-disable-next-line @typescript-eslint/ban-types\n    let obj: object;\n    let res: Record<string, unknown>;\n    let mainError: Error | undefined;\n\n    try {\n      [obj, res] = typeValidator(...args);\n    } catch (e) {\n      obj = {};\n      res = {};\n      mainError = e as Error;\n    }\n\n    const promises: PromiseLike<void>[] = [];\n    const errors: PathError[] = [];\n\n    for (let i = 0; i < tasksCount; i += 1) {\n      const promise = tasks[i](res, errors, obj);\n      if (promise) promises.push(promise);\n    }\n\n    if (!promises.length) {\n      if (errors.length || mainError) {\n        throw createValidationError<SchemaParameters<S>>(\n          errors,\n          mainError || error,\n          ...args,\n        );\n      }\n\n      return res as SchemaResolveType<S>;\n    }\n\n    return Promise.all(promises).then(() => {\n      if (errors.length || mainError) {\n        throw createValidationError<SchemaParameters<S>>(\n          errors,\n          mainError || error,\n          ...args,\n        );\n      }\n\n      return res;\n    }) as SchemaResolveType<S>;\n  }) as SchemaValidatorFunction<S>;\n}\n"]}