react-native-flip/example/node_modules/react-native-codegen/lib/parsers/flow/components/index.js

<div align="center">

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 *
 * @format
 */
'use strict';

function ownKeys(object, enumerableOnly) {
  var keys = Object.keys(object);
  if (Object.getOwnPropertySymbols) {
    var symbols = Object.getOwnPropertySymbols(object);
    if (enumerableOnly)
      symbols = symbols.filter(function(sym) {
        return Object.getOwnPropertyDescriptor(object, sym).enumerable;
      });
    keys.push.apply(keys, symbols);
  }
  return keys;
}

function _objectSpread(target) {
  for (var i = 1; i < arguments.length; i++) {
    var source = arguments[i] != null ? arguments[i] : {};
    if (i % 2) {
      ownKeys(Object(source), true).forEach(function(key) {
        _defineProperty(target, key, source[key]);
      });
    } else if (Object.getOwnPropertyDescriptors) {
      Object.defineProperties(target, Object.getOwnPropertyDescriptors(source));
    } else {
      ownKeys(Object(source)).forEach(function(key) {
        Object.defineProperty(
          target,
          key,
          Object.getOwnPropertyDescriptor(source, key),
        );
      });
    }
  }
  return target;
}

function _defineProperty(obj, key, value) {
  if (key in obj) {
    Object.defineProperty(obj, key, {
      value: value,
      enumerable: true,
      configurable: true,
      writable: true,
    });
  } else {
    obj[key] = value;
  }
  return obj;
}

const _require = require('./commands'),
  getCommands = _require.getCommands;

const _require2 = require('./events'),
  getEvents = _require2.getEvents;

const _require3 = require('./props'),
  getProps = _require3.getProps,
  getPropProperties = _require3.getPropProperties;

const _require4 = require('./options'),
  getCommandOptions = _require4.getCommandOptions,
  getOptions = _require4.getOptions;

const _require5 = require('./extends'),
  getExtendsProps = _require5.getExtendsProps,
  removeKnownExtends = _require5.removeKnownExtends;

const _require6 = require('../utils'),
  getTypes = _require6.getTypes;

function findComponentConfig(ast) {
  const foundConfigs = [];
  const defaultExports = ast.body.filter(
    node => node.type === 'ExportDefaultDeclaration',
  );
  defaultExports.forEach(statement => {
    let declaration = statement.declaration; // codegenNativeComponent can be nested inside a cast
    // expression so we need to go one level deeper

    if (declaration.type === 'TypeCastExpression') {
      declaration = declaration.expression;
    }

    try {
      if (declaration.callee.name === 'codegenNativeComponent') {
        const typeArgumentParams = declaration.typeArguments.params;
        const funcArgumentParams = declaration.arguments;
        const nativeComponentType = {};
        nativeComponentType.propsTypeName = typeArgumentParams[0].id.name;
        nativeComponentType.componentName = funcArgumentParams[0].value;

        if (funcArgumentParams.length > 1) {
          nativeComponentType.optionsExpression = funcArgumentParams[1];
        }

        foundConfigs.push(nativeComponentType);
      }
    } catch (e) {
      // ignore
    }
  });

  if (foundConfigs.length === 0) {
    throw new Error('Could not find component config for native component');
  }

  if (foundConfigs.length > 1) {
    throw new Error('Only one component is supported per file');
  }

  const foundConfig = foundConfigs[0];
  const namedExports = ast.body.filter(
    node => node.type === 'ExportNamedDeclaration',
  );
  const commandsTypeNames = namedExports
    .map(statement => {
      let callExpression;
      let calleeName;

      try {
        callExpression = statement.declaration.declarations[0].init;
        calleeName = callExpression.callee.name;
      } catch (e) {
        return;
      }

      if (calleeName !== 'codegenNativeCommands') {
        return;
      } // const statement.declaration.declarations[0].init

      if (callExpression.arguments.length !== 1) {
        throw new Error(
          'codegenNativeCommands must be passed options including the supported commands',
        );
      }

      const typeArgumentParam = callExpression.typeArguments.params[0];

      if (typeArgumentParam.type !== 'GenericTypeAnnotation') {
        throw new Error(
          "codegenNativeCommands doesn't support inline definitions. Specify a file local type alias",
        );
      }

      return {
        commandTypeName: typeArgumentParam.id.name,
        commandOptionsExpression: callExpression.arguments[0],
      };
    })
    .filter(Boolean);

  if (commandsTypeNames.length > 1) {
    throw new Error('codegenNativeCommands may only be called once in a file');
  }

  return _objectSpread(
    _objectSpread({}, foundConfig),
    {},
    {
      commandTypeName:
        commandsTypeNames[0] == null
          ? null
          : commandsTypeNames[0].commandTypeName,
      commandOptionsExpression:
        commandsTypeNames[0] == null
          ? null
          : commandsTypeNames[0].commandOptionsExpression,
    },
  );
}

function getCommandProperties(commandTypeName, types, commandOptions) {
  if (commandTypeName == null) {
    return [];
  }

  const typeAlias = types[commandTypeName];

  if (typeAlias.type !== 'InterfaceDeclaration') {
    throw new Error(
      `The type argument for codegenNativeCommands must be an interface, received ${typeAlias.type}`,
    );
  }

  let properties;

  try {
    properties = typeAlias.body.properties;
  } catch (e) {
    throw new Error(
      `Failed to find type definition for "${commandTypeName}", please check that you have a valid codegen flow file`,
    );
  }

  const flowPropertyNames = properties
    .map(property => property && property.key && property.key.name)
    .filter(Boolean);

  if (commandOptions == null || commandOptions.supportedCommands == null) {
    throw new Error(
      'codegenNativeCommands must be given an options object with supportedCommands array',
    );
  }

  if (
    commandOptions.supportedCommands.length !== flowPropertyNames.length ||
    !commandOptions.supportedCommands.every(supportedCommand =>
      flowPropertyNames.includes(supportedCommand),
    )
  ) {
    throw new Error(
      `codegenNativeCommands expected the same supportedCommands specified in the ${commandTypeName} interface: ${flowPropertyNames.join(
        ', ',
      )}`,
    );
  }

  return properties;
} // $FlowFixMe there's no flowtype for AST

function buildComponentSchema(ast) {
  const _findComponentConfig = findComponentConfig(ast),
    componentName = _findComponentConfig.componentName,
    propsTypeName = _findComponentConfig.propsTypeName,
    commandTypeName = _findComponentConfig.commandTypeName,
    commandOptionsExpression = _findComponentConfig.commandOptionsExpression,
    optionsExpression = _findComponentConfig.optionsExpression;

  const types = getTypes(ast);
  const propProperties = getPropProperties(propsTypeName, types);
  const commandOptions = getCommandOptions(commandOptionsExpression);
  const commandProperties = getCommandProperties(
    commandTypeName,
    types,
    commandOptions,
  );
  const extendsProps = getExtendsProps(propProperties, types);
  const options = getOptions(optionsExpression);
  const nonExtendsProps = removeKnownExtends(propProperties, types);
  const props = getProps(nonExtendsProps, types);
  const events = getEvents(propProperties, types);
  const commands = getCommands(commandProperties, types);
  return {
    filename: componentName,
    componentName,
    options,
    extendsProps,
    events,
    props,
    commands,
  };
}

module.exports = {
  buildComponentSchema,
};