embark/lib/modules/storage/embarkjs.js

/* global EmbarkJS */

import {findSeries} from 'p-iteration';

let __embarkStorage = {};

__embarkStorage.setProviders = async function (dappConnOptions) {
    try {
      let workingConnFound = await findSeries(dappConnOptions, async (dappConn) => {
        if(dappConn === '$BZZ' || dappConn.provider === 'swarm'){
          let options = dappConn;
          if(dappConn === '$BZZ') options = {"useOnlyGivenProvider": true};
          try{
            await EmbarkJS.Storage.setProvider('swarm', options);
            let isAvailable = await EmbarkJS.Storage.isAvailable();
            return isAvailable;
          }catch(err){
            return false; // catch errors for when bzz object not initialised but config has requested it to be used
          }
        }
        else if(dappConn.provider === 'ipfs') {
          // set the provider then check the connection, if true, use that provider, else, check next provider
          try{
            await EmbarkJS.Storage.setProvider('ipfs', dappConn);
            let isAvailable =  await EmbarkJS.Storage.isAvailable();
            return isAvailable;
          } catch(err) {
            return false;
          }
        }
      });
      if(!workingConnFound) throw new Error('Could not connect to a storage provider using any of the dappConnections in the storage config');
    } catch (err) {
      throw new Error('Failed to connect to a storage provider: ' + err.message);
    }
  };