From 6fd3a94fac5fb8ba036990e609d5fc9cdc6ee633 Mon Sep 17 00:00:00 2001
From: Team 1280 Programming Laptop
 <59985235+Team1280Programming@users.noreply.github.com>
Date: Wed, 14 Feb 2024 18:11:07 -0800
Subject: [PATCH] Enable BibTeX export

---
 src/app/db/loaders.ts                         |  6 +--
 .../document/view/[slug]/DocumentViewer.tsx   | 10 ++++-
 .../document/view/[slug]/VersionChooser.tsx   | 42 ++++++++++++++++++-
 src/app/utils/epoch2datestring.ts             |  4 ++
 4 files changed, 54 insertions(+), 8 deletions(-)

diff --git a/src/app/db/loaders.ts b/src/app/db/loaders.ts
index 2af5727..7f5ecea 100644
--- a/src/app/db/loaders.ts
+++ b/src/app/db/loaders.ts
@@ -83,11 +83,7 @@ export const loadAllAuthors = (): Promise<{ [key: string]: Author }> => {
 
       worker.postMessage('LOAD')
     } else {
-      reject(
-        new Error(
-          'Web Workers are not supported in this environment. Please avoid using a prehistoric browser.'
-        )
-      )
+      return
     }
   })
 }
diff --git a/src/app/document/view/[slug]/DocumentViewer.tsx b/src/app/document/view/[slug]/DocumentViewer.tsx
index 0532e37..6066257 100644
--- a/src/app/document/view/[slug]/DocumentViewer.tsx
+++ b/src/app/document/view/[slug]/DocumentViewer.tsx
@@ -11,6 +11,7 @@ import {
 import { ItemBadge, Status } from '@/app/components/Badges'
 import { notFound } from 'next/navigation'
 import VersionChooser from './VersionChooser'
+import crypto from 'crypto'
 
 const zillaSlab = Zilla_Slab({ subsets: ['latin'], weight: ['500'] })
 
@@ -32,6 +33,13 @@ const DocumentViewer = ({ slug }: Readonly<{ slug: string }>) => {
     status,
   } = manifest
 
+  // git style hash
+  const hash = crypto
+    .createHash('sha256')
+    .update(slug)
+    .digest('hex')
+    .substring(0, 7)
+
   return (
     <div className='max-w-4xl lg:max-w-6xl mx-auto'>
       <h1
@@ -78,7 +86,7 @@ const DocumentViewer = ({ slug }: Readonly<{ slug: string }>) => {
       </p>
       <p className='my-2'>
         <span className='font-bold'>Cite as: </span>
-        {citation ? <>{citation}</> : <>eeXiv:{slug}</>}
+        {citation ? <>{citation}</> : <>eeXiv:{hash}</>}
       </p>
       <VersionChooser doc={doc} slug={slug} />
     </div>
diff --git a/src/app/document/view/[slug]/VersionChooser.tsx b/src/app/document/view/[slug]/VersionChooser.tsx
index ef2b62e..9172621 100644
--- a/src/app/document/view/[slug]/VersionChooser.tsx
+++ b/src/app/document/view/[slug]/VersionChooser.tsx
@@ -2,13 +2,28 @@
 import { useState } from 'react'
 import { Document } from '@/app/db/data'
 import Link from 'next/link'
+import { loadAllAuthors } from '@/app/db/loaders'
+import { useSuspenseQuery } from '@tanstack/react-query'
+import { epoch2date } from '@/app/utils/epoch2datestring'
 
 const VersionChooser = ({
   doc,
   slug,
 }: Readonly<{ doc: Document; slug: string }>) => {
+  const { data, error } = useSuspenseQuery({
+    queryKey: ['authors_all'],
+    queryFn: () => {
+      const data = loadAllAuthors()
+      return data
+    },
+  })
+  if (error) throw error
+
+  let authorList = data
+
   const { file } = doc
-  const { latest } = doc.manifest
+  const { authors, latest } = doc.manifest
+  const date = epoch2date(doc.manifest.dates[doc.manifest.dates.length - 1])
 
   const fileEnding = file === 'other' ? '' : `.${file}`
   const [selectedRevision, setSelectedRevision] = useState<number>(latest) // Initialize the selected revision with the latest revision
@@ -31,8 +46,31 @@ const VersionChooser = ({
           })()}
         </button>
       </Link>
+      <button
+        className='ml-2 h-10 px-2.5 bg-slate-300 rounded-md'
+        onClick={() => {
+          const bibtex = `@article{
+  author={${
+    authors.map((a: string, i) => {
+      const author = authorList[a].name.first + ' ' + authorList[a].name.last
+      if (i === 0) return author
+      else if (i === authors.length - 1) return ` and ${author}`
+      else return `, ${author}`
+    }).join('')
+  }},
+  title={${doc.manifest.title}},
+  journal={eeXiv journal},
+  year={${date.getFullYear()}},
+  month={${date.toLocaleString('default', { month: 'short' })}},
+  url={${window.location.href}}
+}`
+          navigator.clipboard.writeText(bibtex)
+        }}
+      >
+        Export BibTeX
+      </button>
       <select
-        className='ml-2 p-2.5 bg-slate-300 rounded-md'
+        className='ml-2 h-10 px-2.5 bg-slate-300 rounded-md'
         value={`v${selectedRevision}`}
         onChange={(e) => {
           setSelectedRevision(parseInt(e.target.value.replace(/\D/g, ''), 10))
diff --git a/src/app/utils/epoch2datestring.ts b/src/app/utils/epoch2datestring.ts
index f595cff..e93b144 100644
--- a/src/app/utils/epoch2datestring.ts
+++ b/src/app/utils/epoch2datestring.ts
@@ -11,3 +11,7 @@ export function epoch2datestring(epoch: number): string {
 
   return formattedDate
 }
+
+export function epoch2date(epoch: number): Date {
+  return new Date(epoch * 1000)
+}