feat: save value to file

app/src/actions/Publish.ts

@@ -17,31 +17,36 @@ export const setTopic = (topic?: string): Action => {
 export const openFile = () => async (dispatch: Dispatch<any>, getState: () => AppState) => {
   try {
     const file = await getFileContent()
-    dispatch(
-      setPayload(Base64Message.fromBuffer(file.data).toUnicodeString()
-      ))
+    if (file) {
+      dispatch(
+        setPayload(Base64Message.fromBuffer(file.data).toUnicodeString()
+        ))
+    }
   } catch (error) {
     dispatch(showError(error))
   }
-
 }
 
 type FileParameters = {
   name: string,
   data: Buffer
 }
-async function getFileContent(): Promise<FileParameters> {
+async function getFileContent(): Promise<FileParameters | undefined> {
   const rejectReasons = {
     noFileSelected: 'No file selected',
     errorReadingFile: 'Error reading file'
   }
 
-  const openDialogReturnValue = await rendererRpc.call(makeOpenDialogRpc(), {
+  const { canceled, filePaths } = await rendererRpc.call(makeOpenDialogRpc(), {
     properties: ['openFile'],
     securityScopedBookmarks: true,
   })
 
-  const selectedFile = openDialogReturnValue.filePaths && openDialogReturnValue.filePaths[0]
+  if (canceled) {
+    return
+  }
+
+  const selectedFile = filePaths[0]
   if (!selectedFile) {
     throw rejectReasons.noFileSelected
   }

app/src/components/Sidebar/ValueRenderer/ValuePanel.tsx

@@ -1,6 +1,7 @@
 import * as q from '../../../../../backend/src/Model'
 import ActionButtons from './ActionButtons'
 import Copy from '../../helper/Copy'
+import Save from '../../helper/Save'
 import DateFormatter from '../../helper/DateFormatter'
 import MessageHistory from './MessageHistory'
 import Panel from '../Panel'
@@ -59,6 +60,12 @@ function ValuePanel(props: Props) {
     return node?.message && decodeMessage(node.message)?.message?.toUnicodeString()
   }, [node, decodeMessage])
 
+  const getBuffer = () => {
+    if (node?.message && node.message.payload) {
+      return node.message.payload.toBuffer()
+    }
+  }
+
   function messageMetaInfo() {
     if (!props.node || !props.node.message) {
       return null
@@ -93,10 +100,13 @@ function ValuePanel(props: Props) {
   const [value] =
     node && node.message && node.message.payload ? node.message.payload?.format(node.type) : [null, undefined]
   const copyValue = value ? <Copy getValue={getDecodedValue} /> : null
+  const saveValue = value ? <Save getBuffer={getBuffer} /> : null
 
   return (
     <Panel>
-      <span>Value {copyValue}</span>
+      <span>
+        Value {copyValue} {saveValue}
+      </span>
       <span style={{ width: '100%' }}>
         {renderViewOptions()}
         <div style={{ marginBottom: '-8px', marginTop: '8px' }}>

app/src/components/helper/Save.tsx

@@ -0,0 +1,85 @@
+import * as React from 'react'
+import { connect } from 'react-redux'
+import Check from '@material-ui/icons/Check'
+import CustomIconButton from './CustomIconButton'
+import { promises as fsPromise } from 'fs'
+import { SaveAlt } from '@material-ui/icons'
+import { bindActionCreators } from 'redux'
+import { rendererRpc } from '../../../../events'
+import { makeSaveDialogRpc } from '../../../../events/OpenDialogRequest'
+
+import { globalActions } from '../../actions'
+
+export async function saveToFile(buffer: Buffer | string): Promise<string | undefined> {
+  const rejectReasons = {
+    errorWritingFile: 'Error writing file',
+  }
+
+  const { canceled, filePath } = await rendererRpc.call(makeSaveDialogRpc(), {
+    securityScopedBookmarks: true,
+  })
+
+  if (!canceled && filePath !== undefined) {
+    try {
+      await fsPromise.writeFile(filePath, buffer)
+      return filePath
+    } catch (error) {
+      throw rejectReasons.errorWritingFile
+    }
+  }
+}
+
+interface Props {
+  getBuffer: () => Buffer | undefined
+  actions: {
+    global: typeof globalActions
+  }
+}
+
+interface State {
+  didSave: boolean
+}
+
+class Save extends React.PureComponent<Props, State> {
+  constructor(props: Props) {
+    super(props)
+    this.state = { didSave: false }
+  }
+
+  private handleClick = async (event: React.MouseEvent) => {
+    event.stopPropagation()
+    const buffer = this.props.getBuffer()
+    if (buffer !== undefined) {
+      const filename = await saveToFile(buffer)
+      this.props.actions.global.showNotification(`Saved to ${filename}`)
+      this.setState({ didSave: true })
+      setTimeout(() => {
+        this.setState({ didSave: false })
+      }, 1500)
+    }
+  }
+
+  public render() {
+    const icon = !this.state.didSave ? (
+      <SaveAlt fontSize="inherit" />
+    ) : (
+      <Check fontSize="inherit" style={{ cursor: 'default' }} />
+    )
+
+    return (
+      <CustomIconButton onClick={this.handleClick} tooltip="Save to file">
+        <div style={{ marginTop: '2px' }}>{icon}</div>
+      </CustomIconButton>
+    )
+  }
+}
+
+const mapDispatchToProps = (dispatch: any) => {
+  return {
+    actions: {
+      global: bindActionCreators(globalActions, dispatch),
+    },
+  }
+}
+
+export default connect(undefined, mapDispatchToProps)(Save)