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main.go
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package main
import (
"bytes"
"encoding/json"
"errors"
"fmt"
"io"
"log"
"net/http"
"os"
"github.com/go-rod/rod"
"github.com/go-rod/rod/lib/proto"
"github.com/go-rod/rod/lib/utils"
)
type GithubMarkdownBody struct {
Text string `json:"text"`
Mode string `json:"mode"`
Context string `json:"context"`
}
func getMarkdown() ([]byte, error) {
md, err := os.ReadFile("README.md")
if err != nil {
return nil, fmt.Errorf("unable to open file: %w", err)
}
return md, nil
}
func getMarkup(md []byte) (*string, error) {
reqBody := GithubMarkdownBody{
Text: string(md),
Mode: "gfm",
Context: "rcambrj/resume",
}
reqBodyBytes, err := json.Marshal(reqBody)
client := &http.Client{}
req, err := http.NewRequest("POST", "https://api.github.com/markdown", bytes.NewBuffer(reqBodyBytes))
if err != nil {
return nil, fmt.Errorf("unable to create http request: %w", err)
}
req.Header.Set("Content-Type", "application/json")
res, err := client.Do(req)
if err != nil {
return nil, fmt.Errorf("unable to fetch markdown from github: %w", err)
}
defer res.Body.Close()
resBodyBytes, err := io.ReadAll(res.Body)
if err != nil {
return nil, fmt.Errorf("unable to read body of http response: %w", err)
}
resBodyString := string(resBodyBytes)
if res.StatusCode != http.StatusOK {
return nil, errors.New(fmt.Sprintf("unexpected status code fetching from github: %d %s", res.StatusCode, resBodyString))
}
return &resBodyString, nil
}
func getGithubCSS() (*string, error) {
res, err := http.Get("https://raw.githubusercontent.com/sindresorhus/github-markdown-css/main/github-markdown.css")
if err != nil {
return nil, fmt.Errorf("unable to fetch github css: %w", err)
}
defer res.Body.Close()
resBodyBytes, err := io.ReadAll(res.Body)
if err != nil {
return nil, fmt.Errorf("unable to read body of http response: %w", err)
}
resBodyString := string(resBodyBytes)
return &resBodyString, nil
}
func wrapHTML(markup string, css string) string {
return fmt.Sprintf(
`<!DOCTYPE html><html><head><meta charset="utf-8">
<style>
%s
@media print {
.markdown-body {
width: 980px;
}
}
.markdown-body {
box-sizing: border-box;
min-width: 200px;
max-width: 980px;
margin: 0 auto;
padding: 15px;
}
@media (prefers-color-scheme: dark) {
html {
background: black;
color: white;
}
}
</style>
</head><body>
<div class="markdown-body">%s</div>
</body></html>`,
css,
markup)
}
func writeHTML(html string) error {
err := os.WriteFile("index.html", []byte(html), 0644)
if err != nil {
return fmt.Errorf("unable to write html file: %w", err)
}
return nil
}
func writePDF(html string) error {
page := rod.New().MustConnect().MustPage().MustSetDocumentContent(html).MustWaitLoad()
pdf, err := page.PDF(&proto.PagePrintToPDF{})
if err != nil {
return err
}
err = utils.OutputFile("Robert_Cambridge.pdf", pdf)
return nil
}
func main() {
log.Print("Opening file...")
markdown, err := getMarkdown()
if err != nil {
log.Fatal(err)
}
log.Print("Fetching Github CSS...")
css, err := getGithubCSS()
if err != nil {
log.Fatal(err)
}
log.Print("Converting markdown to HTML...")
markup, err := getMarkup(markdown)
if err != nil {
log.Fatal(err)
}
html := wrapHTML(*markup, *css)
log.Print("Writing HTML to file...")
err = writeHTML(html)
if err != nil {
log.Fatal(err)
}
log.Print("Writing PDF to file...")
err = writePDF(html)
if err != nil {
log.Fatal(err)
}
}