feat: add the ability to create and sign while user is offline

src/components/copyModal.tsx

@@ -0,0 +1,27 @@
+import { Dialog, DialogContent, DialogTitle } from '@mui/material'
+import { CopyToClipboard } from './copyToClipboard'
+
+interface CopyModalProps {
+  open: boolean
+  handleClose: () => void
+  title: string
+  textToCopy: string
+}
+
+export const CopyModal = ({
+  open,
+  handleClose,
+  title,
+  textToCopy
+}: CopyModalProps) => {
+  return (
+    <Dialog open={open} onClose={handleClose} maxWidth="xs">
+      <DialogTitle>{title}</DialogTitle>
+      <DialogContent>
+        <CopyToClipboard textToCopy={textToCopy} />
+      </DialogContent>
+    </Dialog>
+  )
+}
+
+export default CopyModal

src/components/copyToClipboard.tsx

@@ -0,0 +1,51 @@
+import { ContentCopy } from '@mui/icons-material/'
+import { Box, IconButton, Typography } from '@mui/material'
+import { toast } from 'react-toastify'
+
+type Props = {
+  textToCopy: string
+}
+
+export const CopyToClipboard = ({ textToCopy }: Props) => {
+  const handleCopyClick = () => {
+    navigator.clipboard.writeText(textToCopy)
+    toast.success('Copied to clipboard', {
+      autoClose: 1000,
+      hideProgressBar: true
+    })
+  }
+
+  return (
+    <Box
+      sx={{
+        display: 'flex',
+        alignItems: 'center',
+        width: '100%'
+      }}
+    >
+      <Typography
+        onClick={(e) => {
+          e.stopPropagation()
+          handleCopyClick()
+        }}
+        component="label"
+        sx={{
+          flex: '1',
+          overflow: 'auto',
+          whiteSpace: 'nowrap',
+          cursor: 'pointer'
+        }}
+      >
+        {textToCopy}
+      </Typography>
+      <IconButton
+        onClick={(e) => {
+          e.stopPropagation()
+          handleCopyClick()
+        }}
+      >
+        <ContentCopy />
+      </IconButton>
+    </Box>
+  )
+}

src/pages/create/index.tsx

@@ -47,11 +47,15 @@ import { DndProvider } from 'react-dnd'
 import { HTML5Backend } from 'react-dnd-html5-backend'
 import type { Identifier, XYCoord } from 'dnd-core'
 import { useDrag, useDrop } from 'react-dnd'
+import saveAs from 'file-saver'
+import CopyModal from '../../components/copyModal'
 
 export const CreatePage = () => {
   const navigate = useNavigate()
   const [isLoading, setIsLoading] = useState(false)
   const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
+  const [openCopyModal, setOpenCopyModel] = useState(false)
+  const [textToCopy, setTextToCopy] = useState('')
 
   const [authUrl, setAuthUrl] = useState<string>()
 
@@ -329,10 +333,12 @@ export const CreatePage = () => {
     const encryptedArrayBuffer = await encryptArrayBuffer(
       arraybuffer,
       encryptionKey
-    )
+    ).finally(() => setIsLoading(false))
 
     const blob = new Blob([encryptedArrayBuffer])
 
+    if (navigator.onLine) {
+      setIsLoading(true)
       setLoadingSpinnerDesc('Uploading zip file to file storage.')
       const fileUrl = await uploadToFileStorage(blob, nostrController)
         .then((url) => {
@@ -381,6 +387,11 @@ export const CreatePage = () => {
           fileUrl
         )}&key=${encodeURIComponent(encryptionKey)}`
       )
+    } else {
+      saveAs(blob, 'request.sigit')
+      setTextToCopy(encryptionKey)
+      setOpenCopyModel(true)
+    }
   }
 
   if (authUrl) {
@@ -471,6 +482,15 @@ export const CreatePage = () => {
           </>
         )}
       </Box>
+      <CopyModal
+        open={openCopyModal}
+        handleClose={() => {
+          setOpenCopyModel(false)
+          navigate(appPrivateRoutes.sign)
+        }}
+        title="Decryption key for Sigit file"
+        textToCopy={textToCopy}
+      />
     </>
   )
 }

src/pages/sign/index.tsx

@@ -59,7 +59,7 @@ import {
   Download,
   HourglassTop
 } from '@mui/icons-material'
-
+import CopyModal from '../../components/copyModal'
 enum SignedStatus {
   Fully_Signed,
   User_Is_Next_Signer,
@@ -79,6 +79,8 @@ export const SignPage = () => {
 
   const [isLoading, setIsLoading] = useState(true)
   const [loadingSpinnerDesc, setLoadingSpinnerDesc] = useState('')
+  const [openCopyModal, setOpenCopyModel] = useState(false)
+  const [textToCopy, setTextToCopy] = useState('')
 
   const [meta, setMeta] = useState<Meta | null>(null)
   const [signedStatus, setSignedStatus] = useState<SignedStatus>()
@@ -98,6 +100,9 @@ export const SignPage = () => {
 
   const [nextSinger, setNextSinger] = useState<string>()
 
+  // This state variable indicates whether the logged-in user is a signer, a creator, or neither.
+  const [isSignerOrCreator, setIsSignerOrCreator] = useState(false)
+
   const usersPubkey = useSelector((state: State) => state.auth.usersPubkey)
 
   const [authUrl, setAuthUrl] = useState<string>()
@@ -167,7 +172,20 @@ export const SignPage = () => {
       // there's no signer just viewers. So its fully signed
       setSignedStatus(SignedStatus.Fully_Signed)
     }
-  }, [signers, signedBy, usersPubkey])
+
+    // Determine and set the status of the user
+    if (submittedBy && usersPubkey && submittedBy === usersPubkey) {
+      // If the submission was made by the user, set the status to true
+      setIsSignerOrCreator(true)
+    } else if (usersPubkey) {
+      // Convert the user's public key from hex to npub format
+      const usersNpub = hexToNpub(usersPubkey)
+      if (signers.includes(usersNpub)) {
+        // If the user's npub is in the list of signers, set the status to true
+        setIsSignerOrCreator(true)
+      }
+    }
+  }, [signers, signedBy, usersPubkey, submittedBy])
 
   useEffect(() => {
     const fileUrl = searchParams.get('file')
@@ -236,6 +254,7 @@ export const SignPage = () => {
     if (!zip) return
 
     setZip(zip)
+    setDisplayInput(false)
 
     setLoadingSpinnerDesc('Parsing meta.json')
 
@@ -414,6 +433,7 @@ export const SignPage = () => {
 
     const blob = new Blob([encryptedArrayBuffer])
 
+    if (navigator.onLine) {
       setLoadingSpinnerDesc('Uploading zip file to file storage.')
       const fileUrl = await uploadToFileStorage(blob, nostrController)
         .then((url) => {
@@ -483,6 +503,9 @@ export const SignPage = () => {
         file: fileUrl,
         key: key
       })
+    } else {
+      handleDecryptedArrayBuffer(arrayBuffer).finally(() => setIsLoading(false))
+    }
   }
 
   const handleExport = async () => {
@@ -549,6 +572,37 @@ export const SignPage = () => {
     navigate(appPrivateRoutes.verify)
   }
 
+  const handleExportSigit = async () => {
+    if (!zip) return
+
+    const arrayBuffer = await zip
+      .generateAsync({
+        type: 'arraybuffer',
+        compression: 'DEFLATE',
+        compressionOptions: {
+          level: 6
+        }
+      })
+      .catch((err) => {
+        console.log('err in zip:>> ', err)
+        setIsLoading(false)
+        toast.error(err.message || 'Error occurred in generating zip file')
+        return null
+      })
+
+    if (!arrayBuffer) return
+
+    const key = await generateEncryptionKey()
+
+    setLoadingSpinnerDesc('Encrypting zip file')
+    const encryptedArrayBuffer = await encryptArrayBuffer(arrayBuffer, key)
+    const blob = new Blob([encryptedArrayBuffer])
+    saveAs(blob, 'exported.sigit')
+
+    setTextToCopy(key)
+    setOpenCopyModel(true)
+  }
+
   /**
    * This function accepts an npub of a signer and return the signature of its previous signer.
    * This prevSig will be used in the content of the provided signer's signedEvent
@@ -637,6 +691,7 @@ export const SignPage = () => {
             <Box className={styles.inputBlock}>
               <MuiFileInput
                 placeholder="Select file"
+                inputProps={{ accept: '.sigit' }}
                 value={selectedFile}
                 onChange={(value) => setSelectedFile(value)}
               />
@@ -675,6 +730,7 @@ export const SignPage = () => {
               nextSigner={nextSinger}
               getPrevSignersSig={getPrevSignersSig}
             />
+
             {signedStatus === SignedStatus.Fully_Signed && (
               <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
                 <Button onClick={handleExport} variant="contained">
@@ -690,9 +746,24 @@ export const SignPage = () => {
                 </Button>
               </Box>
             )}
+
+            {isSignerOrCreator &&
+              signedStatus === SignedStatus.User_Is_Not_Next_Signer && (
+                <Box sx={{ mt: 1, display: 'flex', justifyContent: 'center' }}>
+                  <Button onClick={handleExportSigit} variant="contained">
+                    Export Sigit
+                  </Button>
+                </Box>
+              )}
           </>
         )}
       </Box>
+      <CopyModal
+        open={openCopyModal}
+        handleClose={() => setOpenCopyModel(false)}
+        title="Decryption key for Sigit file"
+        textToCopy={textToCopy}
+      />
     </>
   )
 }