p5.js-web-editor/client/modules/IDE/actions/files.js

import * as ActionTypes from '../../../constants';
import axios from 'axios';
import blobUtil from 'blob-util';

const ROOT_URL = location.href.indexOf('localhost') > 0 ? 'http://localhost:8000/api' : '/api';

function appendToFilename(filename, string) {
  const dotIndex = filename.lastIndexOf('.');
  if (dotIndex === -1) return filename + string;
  return filename.substring(0, dotIndex) + string + filename.substring(dotIndex);
}

function createUniqueName(name, files) {
  let testName = name;
  let index = 1;
  let existingName = files.find((file) => name === file.name);

  while (existingName) {
    testName = appendToFilename(name, `-${index}`);
    index++;
    existingName = files.find((file) => testName === file.name); // eslint-disable-line
  }
  return testName;
}

export function updateFileContent(name, content) {
  return {
    type: ActionTypes.UPDATE_FILE_CONTENT,
    name,
    content
  };
}

export function getBlobUrl(file) {
  return (dispatch) => {
    blobUtil.imgSrcToBlob(file.url, undefined, { crossOrigin: 'Anonymous' })
    .then(blobUtil.createObjectURL)
    .then(objectURL => {
      dispatch({
        type: ActionTypes.SET_BLOB_URL,
        name: file.name,
        blobURL: objectURL
      });
    });
  };
}

export function createFile(formProps) {
  return (dispatch, getState) => {
    const state = getState();
    if (state.project.id) {
      const postParams = {
        name: createUniqueName(formProps.name, state.files),
        url: formProps.url
      };
      axios.post(`${ROOT_URL}/projects/${state.project.id}/files`, postParams, { withCredentials: true })
        .then(response => {
          if (response.data.url) {
            getBlobUrl(response.data)(dispatch);
          }
          dispatch({
            type: ActionTypes.CREATE_FILE,
            ...response.data
          });
          dispatch({
            type: ActionTypes.HIDE_MODAL
          });
        })
        .catch(response => dispatch({
          type: ActionTypes.ERROR,
          error: response.data
        }));
    } else {
      let maxFileId = 0;
      state.files.forEach(file => {
        if (parseInt(file.id, 10) > maxFileId) {
          maxFileId = parseInt(file.id, 10);
        }
      });
      if (formProps.url) {
        getBlobUrl(formProps)(dispatch);
      }
      dispatch({
        type: ActionTypes.CREATE_FILE,
        name: createUniqueName(formProps.name, state.files),
        id: `${maxFileId + 1}`,
        url: formProps.url
      });
      dispatch({
        type: ActionTypes.HIDE_MODAL
      });
    }
  };
}