remove node-latex in favour of swiftlatex

package.json

@@ -16,7 +16,6 @@
     "fs-extra": "^10.1.0",
     "jotai": "^1.7.0",
     "next": "^13.5.4",
-    "node-latex": "^3.1.0",
     "polished": "^4.2.2",
     "react": "^18.2.0",
     "react-dom": "^18.2.0",

src/components/generator/form/Form.tsx

@@ -3,6 +3,7 @@ import { useRouter } from 'next/router'
 import { FormProvider, useForm } from 'react-hook-form'
 import { useAtom } from 'jotai'
 import styled from 'styled-components'
+
 import { ProfileSection } from './sections/ProfileSection'
 import { EducationSection } from './sections/EducationSection'
 import { WorkSection } from './sections/WorkSection'
@@ -12,19 +13,13 @@ import { ProjectsSection } from './sections/projectsSection'
 import { resumeAtom } from '../../../atoms/resume'
 import { FormValues } from '../../../types'
 
-async function generateResume(formData: FormValues): Promise<string> {
-  const pdfResponse = await fetch('/api/generate-pdf', {
-    method: 'POST',
-    headers: {
-      'Content-Type': 'application/json'
-    },
-    body: JSON.stringify(formData)
-  })
+import latex from '../../../lib/latex'
+import getTemplateData from '../../../lib/templates'
 
-  const pdfBlob = await pdfResponse.blob()
-  const pdfUrl = URL.createObjectURL(pdfBlob)
 
-  return pdfUrl
+async function generateResume(formData: FormValues): Promise<string> {
+  const { texDoc, opts } = getTemplateData({...formData, sections: ['profile']})
+  return latex(texDoc, opts)
 }
 
 const StyledForm = styled.form`

src/lib/latex.ts

@@ -0,0 +1,47 @@
+import { PdfTeXEngine, XeTeXEngine, DvipdfmxEngine } from 'swiftlatex'
+import { LaTeXOpts } from '../types'
+
+let pdftex
+let xetex
+let dvipdfmx
+let engineLoaded = false
+
+export default async function latex(texDoc: string, opts: LaTeXOpts) {
+  if (!engineLoaded) {
+    pdftex = new PdfTeXEngine()
+    await pdftex.loadEngine()
+
+    xetex = new XeTeXEngine()
+    await xetex.loadEngine()
+
+    dvipdfmx = new DvipdfmxEngine()
+    await dvipdfmx.loadEngine()
+
+    engineLoaded = true
+  }
+
+  switch(opts.cmd) {
+    case 'pdflatex': {
+      await pdftex.writeMemFSFile("main.tex", texDoc)
+      await pdftex.setEngineMainFile("main.tex")
+      const { pdf } = await pdftex.compileLaTeX()
+
+      return URL.createObjectURL(new Blob([pdf], {type: 'application/pdf'}))
+    }
+    case 'xelatex': {
+      await xetex.writeMemFSFile("main.tex", texDoc)
+      await xetex.setEngineMainFile("main.tex")
+      const res = await xetex.compileLaTeX()
+      console.log(res)
+
+      await dvipdfmx.writeMemFSFile("main.xdv", res.pdf)
+      await dvipdfmx.setEngineMainFile("main.xdv")
+      const { pdf } = await dvipdfmx.compilePDF()
+
+      return URL.createObjectURL(new Blob([pdf], {type: 'application/pdf'}))
+    }
+    case 'lualatex': {
+      throw new Error(`${opts.cmd} is not supported yet`)
+    }
+  }
+}

src/lib/templates/index.ts

@@ -1,4 +1,3 @@
-import path from 'node:path'
 import template1 from './template1'
 import template2 from './template2'
 import template3 from './template3'
@@ -21,21 +20,16 @@ import {
 } from './constants'
 import { FormValues, TemplateData } from '../../types'
 
-function resolveTemplatePath(templatePath: string) {
-  return path.resolve(process.cwd(), 'src/lib/templates' + templatePath)
-}
 
 /**
  * Generates the LaTeX document based on the selected template
- * as well as the necessary options needed for it to create a
- * pdf via node-latex.
+ * as well as the necessary options needed for it to create a pdf.
  *
  * @param data - The sanitized form data from the request body.
  *
  * @return The generated LaTeX document as well as its additional opts.
  */
 export default function getTemplateData(data: FormValues): TemplateData {
-  // TODO: list required packages for each template
   switch (data.selectedTemplate) {
     case TEMPLATE1:
       return {
@@ -50,8 +44,8 @@ export default function getTemplateData(data: FormValues): TemplateData {
         texDoc: template2(data),
         opts: {
           cmd: 'xelatex',
-          inputs: resolveTemplatePath('/template2/inputs'),
-          fonts: resolveTemplatePath('/template2/inputs')
+          inputs: '/template2/inputs',
+          fonts: '/template2/inputs'
         }
       }
 
@@ -68,8 +62,8 @@ export default function getTemplateData(data: FormValues): TemplateData {
         texDoc: template4(data),
         opts: {
           cmd: 'xelatex',
-          inputs: resolveTemplatePath('/template4/inputs'),
-          fonts: resolveTemplatePath('/template4/inputs')
+          inputs: '/template4/inputs',
+          fonts: '/template4/inputs'
         }
       }
 
@@ -78,8 +72,8 @@ export default function getTemplateData(data: FormValues): TemplateData {
         texDoc: template5(data),
         opts: {
           cmd: 'pdflatex',
-          inputs: resolveTemplatePath('/template5/inputs'),
-          fonts: resolveTemplatePath('/template5/inputs')
+          inputs: '/template5/inputs',
+          fonts: '/template5/inputs'
         }
       }
 
@@ -88,8 +82,8 @@ export default function getTemplateData(data: FormValues): TemplateData {
         texDoc: template6(data),
         opts: {
           cmd: 'xelatex',
-          inputs: resolveTemplatePath('/template6/inputs'),
-          fonts: resolveTemplatePath('/template6/inputs')
+          inputs: '/template6/inputs',
+          fonts: '/template6/inputs'
         }
       }
 
@@ -98,7 +92,7 @@ export default function getTemplateData(data: FormValues): TemplateData {
         texDoc: template7(data),
         opts: {
           cmd: 'pdflatex',
-          inputs: resolveTemplatePath('/template7/inputs')
+          inputs: '/template7/inputs'
         }
       }
 
@@ -107,7 +101,7 @@ export default function getTemplateData(data: FormValues): TemplateData {
         texDoc: template8(data),
         opts: {
           cmd: 'lualatex',
-          inputs: resolveTemplatePath('/template8/inputs')
+          inputs: '/template8/inputs'
         }
       }