routes/template.go (view raw)
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import (
"bytes"
"html/template"
"io"
"log"
"net/http"
"path/filepath"
"strings"
"github.com/alecthomas/chroma/v2/formatters/html"
"github.com/alecthomas/chroma/v2/lexers"
"github.com/alecthomas/chroma/v2/styles"
"go.alanpearce.eu/elgit/git"
)
func (d *deps) Write404(w http.ResponseWriter) {
tpath := filepath.Join(d.c.Dirs.Templates, "*")
t := template.Must(template.ParseGlob(tpath))
w.WriteHeader(404)
if err := t.ExecuteTemplate(w, "404", nil); err != nil {
log.Printf("404 template: %s", err)
}
}
func (d *deps) Write500(w http.ResponseWriter) {
tpath := filepath.Join(d.c.Dirs.Templates, "*")
t := template.Must(template.ParseGlob(tpath))
w.WriteHeader(500)
if err := t.ExecuteTemplate(w, "500", nil); err != nil {
log.Printf("500 template: %s", err)
}
}
func (d *deps) listFiles(files []git.NiceTree, data map[string]any, w http.ResponseWriter) {
tpath := filepath.Join(d.c.Dirs.Templates, "*")
t := template.Must(template.ParseGlob(tpath))
data["files"] = files
data["meta"] = d.c.Meta
if err := t.ExecuteTemplate(w, "tree", data); err != nil {
log.Println(err)
return
}
}
func countLines(r io.Reader) (int, error) {
buf := make([]byte, 32*1024)
bufLen := 0
count := 0
nl := []byte{'\n'}
for {
c, err := r.Read(buf)
if c > 0 {
bufLen += c
}
count += bytes.Count(buf[:c], nl)
switch {
case err == io.EOF:
/* handle last line not having a newline at the end */
if bufLen >= 1 && buf[(bufLen-1)%(32*1024)] != '\n' {
count++
}
return count, nil
case err != nil:
return 0, err
}
}
}
func (d *deps) showFileWithHighlight(
name, content string,
data map[string]any,
w http.ResponseWriter,
) {
tpath := filepath.Join(d.c.Dirs.Templates, "*")
t := template.Must(template.ParseGlob(tpath))
lexer := lexers.Get(name)
if lexer == nil {
lexer = lexers.Get(".txt")
}
style := styles.Get(d.c.Meta.SyntaxHighlight)
if style == nil {
style = styles.Get("monokailight")
}
formatter := html.New(
html.WithLineNumbers(true),
html.WithLinkableLineNumbers(true, "L"),
)
iterator, err := lexer.Tokenise(nil, content)
if err != nil {
d.Write500(w)
return
}
var code bytes.Buffer
err = formatter.Format(&code, style, iterator)
if err != nil {
d.Write500(w)
return
}
data["content"] = template.HTML(code.String())
data["meta"] = d.c.Meta
data["chroma"] = true
if err := t.ExecuteTemplate(w, "file", data); err != nil {
log.Println(err)
return
}
}
func (d *deps) showFile(content string, data map[string]any, w http.ResponseWriter) {
tpath := filepath.Join(d.c.Dirs.Templates, "*")
t := template.Must(template.ParseGlob(tpath))
lc, err := countLines(strings.NewReader(content))
if err != nil {
// Non-fatal, we'll just skip showing line numbers in the template.
log.Printf("counting lines: %s", err)
}
lines := make([]int, lc)
if lc > 0 {
for i := range lines {
lines[i] = i + 1
}
}
data["linecount"] = lines
data["content"] = content
data["meta"] = d.c.Meta
data["chroma"] = false
if err := t.ExecuteTemplate(w, "file", data); err != nil {
log.Println(err)
return
}
}
func (d *deps) showRaw(content string, w http.ResponseWriter) {
w.WriteHeader(http.StatusOK)
w.Header().Set("Content-Type", "text/plain")
w.Write([]byte(content))
return
}
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