140 lines
3.2 KiB
Go
140 lines
3.2 KiB
Go
package main
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import (
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"bytes"
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"flag"
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"fmt"
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"io"
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"log"
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"net/http"
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"net/url"
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"os"
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"os/exec"
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"strings"
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"text/template"
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"time"
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)
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var ledgerTpl *template.Template
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var htmlTpl *template.Template
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var LEDGER_FILE string
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var LEDGER_INIT string
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var WORKING_DIR string
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var HOST string
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type TxData struct {
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Name string
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Date string
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Amount string
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Account string
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}
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func init() {
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ledgerTpl = template.Must(template.ParseGlob("tx/*"))
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htmlTpl = template.Must(template.ParseGlob("templates/*.html"))
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flag.StringVar(&LEDGER_FILE, "f", "example.txt", "ledger journal file to write")
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flag.StringVar(&LEDGER_INIT, "i", "", "ledger initiation file")
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flag.StringVar(&WORKING_DIR, "w", "", "ledger working directory")
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flag.StringVar(&HOST, "b", "127.0.0.1:8000", "binding address")
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flag.Parse()
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}
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func main() {
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http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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htmlTpl.ExecuteTemplate(w, "index.html", struct {
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Templates []*template.Template
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Scripts map[string][]string
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}{
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ledgerTpl.Templates(),
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SCRIPTS,
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})
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})
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http.HandleFunc("/new", func(w http.ResponseWriter, r *http.Request) {
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if err := r.ParseForm(); err != nil {
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http.Error(w, err.Error(), 400)
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return
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}
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tx, err := newTx(r.Form)
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if err != nil {
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http.Error(w, err.Error(), 400)
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log.Println(err, r.Form)
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return
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}
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if err := htmlTpl.ExecuteTemplate(w, "new.html", struct {
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Tx string
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}{tx}); err != nil {
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http.Error(w, err.Error(), 500)
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}
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})
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http.HandleFunc("/submit", func(w http.ResponseWriter, r *http.Request) {
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if err := r.ParseForm(); err != nil {
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http.Error(w, err.Error(), 400)
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return
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}
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tx := r.FormValue("tx")
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if err := appendToFile(tx); err != nil {
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http.Error(w, err.Error(), 500)
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return
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}
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if err := htmlTpl.ExecuteTemplate(w, "success.html", struct {
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Tx string
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}{tx}); err != nil {
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http.Error(w, err.Error(), 500)
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}
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})
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http.HandleFunc("/exec", func(w http.ResponseWriter, r *http.Request) {
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name := r.FormValue("name")
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if err := executeScript(w, name); err != nil {
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http.Error(w, err.Error(), 500)
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log.Println(err)
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return
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}
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})
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log.Printf("Listen on %s", HOST)
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log.Fatal(http.ListenAndServe(HOST, nil))
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}
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func newTx(params url.Values) (result string, err error) {
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action := params.Get("action")
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data := TxData{
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Date: time.Now().Format("2006/01/02"),
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Amount: params.Get("amount"),
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Account: params.Get("account"),
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Name: params.Get("name"),
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}
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var buf bytes.Buffer
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err = ledgerTpl.ExecuteTemplate(&buf, action, data)
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return buf.String(), nil
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}
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func appendToFile(tx string) (err error) {
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f, err := os.OpenFile(LEDGER_FILE, os.O_WRONLY|os.O_CREATE|os.O_APPEND, 0644)
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if err != nil {
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return err
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}
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defer f.Close()
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buf := strings.NewReader(strings.ReplaceAll(tx, "\r", "")) // Remove CR generated from browser
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_, err = io.Copy(f, buf)
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return err
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}
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func executeScript(w io.Writer, name string) (err error) {
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script, ok := SCRIPTS[name]
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if !ok {
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return fmt.Errorf("%s script not found", name)
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}
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cmd := exec.Command("ledger", append([]string{"--init-file", LEDGER_INIT, "--file", LEDGER_FILE}, script...)...)
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cmd.Dir = WORKING_DIR
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cmd.Stdout = w
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cmd.Stderr = w
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return cmd.Run()
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}
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