add more feedback

.travis.yml

@@ -1,9 +1,15 @@
 dist: xenial
+sudo: required
 language: node_js
 node_js: node
 
 cache: npm
 
+before_install:
+  # Fixes an issue where the max file watch count is exceeded, triggering ENOSPC
+  # https://stackoverflow.com/questions/22475849/node-js-error-enospc#32600959
+  - echo fs.inotify.max_user_watches=524288 | sudo tee -a /etc/sysctl.conf && sudo sysctl -p
+
 # will run `npm install` automatically here
 
 script:

src/components/Add.module.css

@@ -1,3 +1,5 @@
+@import '../styles/_variables.css';
+
 .add {
   max-width: 40rem;
   width: 100%;
@@ -5,3 +7,9 @@
   word-wrap: break-word;
   word-break: break-all;
 }
+
+.error {
+  font-size: var(--font-size-small);
+  color: var(--red);
+  margin-top: var(--spacer);
+}

src/components/Add.tsx

@@ -1,25 +1,85 @@
-import React, { useState } from 'react'
-import { saveToIpfs } from '../ipfs'
-import { ipfsGateway } from '../../site.config'
+import React, { useState, useEffect } from 'react'
+import { ipfsNodeUri, ipfsGateway } from '../../site.config'
 import Dropzone from './Dropzone'
 import styles from './Add.module.css'
 import Spinner from './Spinner'
+import useIpfsApi, { IpfsConfig } from '../hooks/use-ipfs-api'
+
+export function formatBytes(a: number, b: number) {
+  if (a === 0) return '0 Bytes'
+  const c = 1024
+  const d = b || 2
+  const e = ['Bytes', 'KB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB']
+  const f = Math.floor(Math.log(a) / Math.log(c))
+  return parseFloat((a / Math.pow(c, f)).toFixed(d)) + ' ' + e[f]
+}
+
+const { hostname, port, protocol } = new URL(ipfsNodeUri)
+
+const ipfsConfig: IpfsConfig = {
+  protocol: protocol.replace(':', ''),
+  host: hostname,
+  port: port || '443'
+}
+
+async function addToIpfs(
+  files: File[],
+  setFileSizeReceived: (size: string) => void
+) {
+  const { ipfs } = useIpfsApi(ipfsConfig)
+  const file = [...files][0]
+  const fileDetails = { path: file.name, content: file }
+
+  const response = await ipfs.add(fileDetails, {
+    wrapWithDirectory: true,
+    progress: (length: number) => setFileSizeReceived(formatBytes(length, 0))
+  })
+
+  // CID of wrapping directory is returned last
+  const cid = response[response.length - 1].hash
+  return cid
+}
 
 export default function Add() {
+  const { isIpfsReady, ipfsError } = useIpfsApi(ipfsConfig)
   const [fileHash, setFileHash] = useState()
   const [loading, setLoading] = useState(false)
+  const [message, setMessage] = useState()
+  const [error, setError] = useState()
+  const [fileSize, setFileSize] = useState()
+  const [fileSizeReceived, setFileSizeReceived] = useState('')
+
+  useEffect(() => {
+    setMessage(
+      `Adding to IPFS<br />
+       <small>${fileSizeReceived || 0}/${fileSize}</small><br />`
+    )
+  }, [fileSize, fileSizeReceived])
+
+  async function handleOnDrop(acceptedFiles: File[]) {
+    if (!acceptedFiles[0]) return
 
-  const handleCaptureFile = async (files: File[]) => {
     setLoading(true)
-    const cid = await saveToIpfs(files)
+    setError(null)
+
+    const totalSize = formatBytes(acceptedFiles[0].size, 0)
+    setFileSize(totalSize)
+
+    try {
+      const cid = await addToIpfs(acceptedFiles, setFileSizeReceived)
+      if (!cid) return
       setFileHash(cid)
       setLoading(false)
+    } catch (error) {
+      setError(`Adding to IPFS failed: ${error.message}`)
+      return null
+    }
   }
 
   return (
     <div className={styles.add}>
       {loading ? (
-        <Spinner />
+        <Spinner message={message} />
       ) : fileHash ? (
         <a
           target="_blank"
@@ -29,7 +89,16 @@ export default function Add() {
           ipfs://{fileHash}
         </a>
       ) : (
-        <Dropzone multiple={false} handleOnDrop={handleCaptureFile} />
+        <>
+          <Dropzone
+            multiple={false}
+            handleOnDrop={handleOnDrop}
+            disabled={!isIpfsReady}
+          />
+          {(error || ipfsError) && (
+            <div className={styles.error}>{error || ipfsError}</div>
+          )}
+        </>
       )}
     </div>
   )

src/components/Dropzone.module.css

@@ -22,7 +22,7 @@
 
 .disabled {
   composes: dropzone;
-  opacity: 0.5;
+  opacity: 0.3;
   pointer-events: none;
 }
 

src/components/Spinner.tsx

@@ -1,6 +1,17 @@
 import React from 'react'
 import styles from './Spinner.module.css'
 
-export default function Spinner() {
-  return <div className={styles.spinner} />
+const Spinner = ({ message }: { message?: string }) => {
+  return (
+    <div className={styles.spinner}>
+      {message && (
+        <div
+          className={styles.spinnerMessage}
+          dangerouslySetInnerHTML={{ __html: message }}
+        />
+      )}
+    </div>
+  )
 }
+
+export default Spinner

src/hooks/use-ipfs-api.tsx

@@ -0,0 +1,49 @@
+import { useEffect, useState } from 'react'
+import ipfsClient from 'ipfs-http-client'
+
+let ipfs: any = null
+let ipfsVersion = ''
+
+export interface IpfsConfig {
+  protocol: string
+  host: string
+  port: string
+}
+
+export default function useIpfsApi(config: IpfsConfig) {
+  const [isIpfsReady, setIpfsReady] = useState(Boolean(ipfs))
+  const [ipfsError, setIpfsError] = useState('')
+
+  async function initIpfs() {
+    if (ipfs !== null) return
+    // eslint-disable-next-line
+    ipfs = await ipfsClient(config)
+
+    try {
+      const version = await ipfs.version()
+      ipfsVersion = version.version
+    } catch (error) {
+      setIpfsError(`IPFS connection error: ${error.message}`)
+      return
+    }
+    setIpfsReady(Boolean(await ipfs.id()))
+  }
+
+  useEffect(() => {
+    initIpfs()
+  }, [config])
+
+  useEffect(() => {
+    // just like componentWillUnmount()
+    return function cleanup() {
+      if (ipfs) {
+        setIpfsReady(false)
+        ipfs = null
+        ipfsVersion = ''
+        setIpfsError('')
+      }
+    }
+  }, [])
+
+  return { ipfs, ipfsVersion, isIpfsReady, ipfsError }
+}

src/ipfs.ts

@@ -1,35 +0,0 @@
-import ipfsClient from 'ipfs-http-client'
-import { ipfsNodeUri } from '../site.config'
-
-export async function saveToIpfs(files: File[]) {
-  const { hostname, port, protocol } = new URL(ipfsNodeUri)
-
-  const ipfsConfig = {
-    protocol: protocol.replace(':', ''),
-    host: hostname,
-    port: port || '443'
-  }
-
-  const ipfs = ipfsClient(ipfsConfig)
-
-  const file = [...files][0]
-  let ipfsId
-  const fileDetails = {
-    path: file.name,
-    content: file
-  }
-  const options = {
-    wrapWithDirectory: true,
-    progress: (prog: number) => console.log(`received: ${prog}`)
-  }
-
-  try {
-    const response = await ipfs.add(fileDetails, options)
-
-    // CID of wrapping directory is returned last
-    ipfsId = `${response[response.length - 1].hash}/${fileDetails.path}`
-    return ipfsId
-  } catch (error) {
-    console.error(error.message)
-  }
-}