Dispatch your reducer codemod

_readme.md

Codemod to convert your redux code from dispatching a type string to reducer function.

The reducer_codemod.js converts

export default createStore(initialState, {
  GOT_PAGE_DATA: (state, payload) => {
    return {
      ...state,
      data: payload
    };
  },
  GOT_PAGE2_DATA: (state, payload) => {
    return {
      ...state,
      data2: payload
    }
  }
})

to

export function GOT_PAGE_DATA (state, payload) {
  return {
    ...state,
    data: payload
  };
}

export function GOT_PAGE2_DATA (state, payload) {
  return {
    ...state,
    data2: payload
  };
}

reducer_codemod.js

// How to run:
// npm i -g jscodeshift
// jscodeshift -t codemods/reducer_codemod.js ./src/reducers/*.js

module.exports = function (fileInfo, api, options) {
  const j = api.jscodeshift
  // console.log(fileInfo)

  const root = j(fileInfo.source)

  return root
    .find(j.ExportDefaultDeclaration, {
      declaration: {
        type: 'CallExpression',
        callee: {
          name: 'createReducer'
        }
      }
    })
    .replaceWith(p => {
      const reducerObj = p.value.declaration.arguments[1]
      if (reducerObj.type !== 'ObjectExpression') {
        console.log("I can't do this")
        return p
      }
      return reducerObj.properties.map(property => {
        const key = property.key.name
        if (
          (property.value.type === 'FunctionExpression') ||
          (property.value.type === 'ArrowFunctionExpression')
        ) {
          const params = property.value.params
          let body = property.value.body
          if (body.type !== 'BlockStatement') {
            body = j.blockStatement([j.returnStatement(body)])
          }
          return j.exportNamedDeclaration(
            j.functionDeclaration(j.identifier(key), params, body)
          )
        } else if (property.value.type === 'Identifier') {
          return j.exportNamedDeclaration(null, [
            j.exportSpecifier(property.value, j.identifier(key))
          ])
        }
      })
    })
    .toSource()
}