Migrate to layout

.gitignore

@@ -1,3 +1,4 @@
 .env
 test.txt
 ledger-quicknote
+*.txt

auth/auth.go

@@ -0,0 +1,93 @@
+package auth
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"os"
+	"strings"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+type AuthStore interface {
+	Register(user, pass string) error
+	Authenticate(user, pass string) error
+	Remove(user string) error
+}
+
+type Htpasswd struct {
+	accounts map[string]string
+	filePath string
+}
+
+func NewHtpasswd(path string) (AuthStore, error) {
+	s := Htpasswd{
+		filePath: path,
+	}
+	err := s.read()
+	return s, err
+}
+
+func (s *Htpasswd) read() (err error) {
+	file, err := os.Open(s.filePath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	fileScanner := bufio.NewScanner(file)
+	fileScanner.Split(bufio.ScanLines)
+
+	s.accounts = make(map[string]string)
+	for fileScanner.Scan() {
+		arr := strings.SplitN(fileScanner.Text(), ":", 2)
+		if len(arr) < 2 {
+			return fmt.Errorf("invalid data %s", arr)
+		}
+		s.accounts[arr[0]] = arr[1]
+	}
+	return nil
+}
+
+func (s *Htpasswd) write() (err error) {
+	file, err := os.OpenFile(s.filePath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0600)
+	if err != nil {
+		return fmt.Errorf("failed to open htpasswd file: %w", err)
+	}
+	defer file.Close()
+
+	for u, p := range s.accounts {
+		_, err = fmt.Fprintf(file, "%s:%s\n", u, p)
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func (s Htpasswd) Register(user, pass string) (err error) {
+	s.accounts[user], err = hash(pass)
+	if err != nil {
+		return
+	}
+	return s.write()
+}
+
+func (s Htpasswd) Authenticate(user, pass string) (err error) {
+	hashed, ok := s.accounts[user]
+	if !ok {
+		return errors.New("user not found")
+	}
+	return bcrypt.CompareHashAndPassword([]byte(hashed), []byte(pass))
+}
+
+func (s Htpasswd) Remove(user string) (err error) {
+	delete(s.accounts, user)
+	return s.write()
+}
+
+func hash(pass string) (string, error) {
+	output, err := bcrypt.GenerateFromPassword([]byte(pass), bcrypt.DefaultCost)
+	return string(output), err
+}

auth/auth_test.go

@@ -0,0 +1,66 @@
+package auth
+
+import (
+	"fmt"
+	"io/ioutil"
+	"strings"
+	"testing"
+)
+
+type User struct {
+	user   string
+	pass   string
+	hashed string
+}
+
+func TestHtpasswdSuccess(t *testing.T) {
+	path := "/tmp/.htpasswd"
+	user1 := User{
+		user:   "user",
+		pass:   "password",
+		hashed: "$2a$14$SQSscaF4fVO3e5dp2/.VPuVQDPKqxSagLQnN6OncTRtoQw0ie9ByK",
+	}
+	err := ioutil.WriteFile(path,
+		[]byte(fmt.Sprintf("%s:%s", user1.user, user1.hashed)), 0640)
+	if err != nil {
+		t.Fatal(err)
+	}
+	store, err := NewHtpasswd(path)
+	if err != nil {
+		t.Fatal(err)
+	}
+	err = store.Authenticate(user1.user, user1.pass)
+	if err != nil {
+		t.Error(err)
+	}
+
+	user2 := User{
+		user: "foo",
+		pass: "bar",
+	}
+	err = store.Register(user2.user, user2.pass)
+	if err != nil {
+		t.Error(err)
+	}
+	data, err := ioutil.ReadFile(path)
+	if err != nil {
+		t.Error(err)
+	}
+	for _, u := range []User{user1, user2} {
+		if !strings.Contains(string(data), u.user) {
+			t.Errorf("%s not found in htpasswd file: %s", u.user, string(data))
+		}
+	}
+	err = store.Remove(user1.user)
+	if err != nil {
+		t.Error(err)
+	}
+
+	data, err = ioutil.ReadFile(path)
+	if err != nil {
+		t.Error(err)
+	}
+	if strings.Contains(string(data), user1.user) {
+		t.Errorf("%s is found in htpasswd file but should be removed: %s", user1.user, string(data))
+	}
+}

go.mod

@@ -1,3 +1,26 @@
 module github.com/lancatlin/ledger-quicknote
 
 go 1.19
+
+require (
+	github.com/gin-contrib/multitemplate v0.0.0-20220829131020-8c2a8441bc2b // indirect
+	github.com/gin-contrib/sse v0.1.0 // indirect
+	github.com/gin-gonic/gin v1.8.1 // indirect
+	github.com/go-playground/locales v0.14.0 // indirect
+	github.com/go-playground/universal-translator v0.18.0 // indirect
+	github.com/go-playground/validator/v10 v10.10.0 // indirect
+	github.com/goccy/go-json v0.9.7 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/leodido/go-urn v1.2.1 // indirect
+	github.com/mattn/go-isatty v0.0.14 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180228061459-e0a39a4cb421 // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/pelletier/go-toml/v2 v2.0.1 // indirect
+	github.com/ugorji/go/codec v1.2.7 // indirect
+	golang.org/x/crypto v0.1.0 // indirect
+	golang.org/x/net v0.1.0 // indirect
+	golang.org/x/sys v0.1.0 // indirect
+	golang.org/x/text v0.4.0 // indirect
+	google.golang.org/protobuf v1.28.0 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+)

go.sum

@@ -0,0 +1,84 @@
+github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
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+github.com/go-playground/universal-translator v0.18.0 h1:82dyy6p4OuJq4/CByFNOn/jYrnRPArHwAcmLoJZxyho=
+github.com/go-playground/universal-translator v0.18.0/go.mod h1:UvRDBj+xPUEGrFYl+lu/H90nyDXpg0fqeB/AQUGNTVA=
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+gopkg.in/check.v1 v1.0.0-20201130134442-10cb98267c6c/go.mod h1:JHkPIbrfpd72SG/EVd6muEfDQjcINNoR0C8j2r3qZ4Q=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
+gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.0-20210107192922-496545a6307b/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=

main.go

@@ -6,13 +6,13 @@ import (
 	"fmt"
 	"io"
 	"log"
-	"net/http"
-	"net/url"
 	"os"
 	"os/exec"
 	"strings"
 	"text/template"
 	"time"
+
+	"github.com/gin-gonic/gin"
 )
 
 var ledgerTpl *template.Template
@@ -24,15 +24,15 @@ var WORKING_DIR string
 var HOST string
 
 type TxData struct {
-	Name    string
+	Action  string `form:"action" binding:"required"`
+	Name    string `form:"name"`
 	Date    string
-	Amount  string
+	Amount  string `form:"amount" binding:"required"`
-	Account string
+	Account string `form:"account"`
 }
 
 func init() {
 	ledgerTpl = template.Must(template.ParseGlob("tx/*"))
-	htmlTpl = template.Must(template.ParseGlob("templates/*.html"))
 	flag.StringVar(&LEDGER_FILE, "f", "example.txt", "ledger journal file to write")
 	flag.StringVar(&LEDGER_INIT, "i", "", "ledger initiation file")
 	flag.StringVar(&WORKING_DIR, "w", "", "ledger working directory")
@@ -41,8 +41,10 @@ func init() {
 }
 
 func main() {
-	http.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
+	r := gin.Default()
-		htmlTpl.ExecuteTemplate(w, "index.html", struct {
+	r.HTMLRender = loadTemplates("templates")
+	r.GET("/", func(c *gin.Context) {
+		c.HTML(200, "index.html", struct {
 			Templates []*template.Template
 			Scripts   map[string][]string
 		}{
@@ -51,66 +53,51 @@ func main() {
 		})
 	})
 
-	http.HandleFunc("/new", func(w http.ResponseWriter, r *http.Request) {
+	r.POST("/new", func(c *gin.Context) {
-		if err := r.ParseForm(); err != nil {
+		var data TxData
-			http.Error(w, err.Error(), 400)
+		if err := c.ShouldBind(&data); err != nil {
+			c.AbortWithError(400, err)
 			return
 		}
-		tx, err := newTx(r.Form)
+		tx, err := newTx(data)
 		if err != nil {
-			http.Error(w, err.Error(), 400)
+			c.AbortWithError(400, err)
-			log.Println(err, r.Form)
+			log.Println(err, c.Request.Form)
 			return
 		}
-		if err := htmlTpl.ExecuteTemplate(w, "new.html", struct {
+		c.HTML(200, "new.html", struct {
 			Tx string
-		}{tx}); err != nil {
+		}{tx})
-			http.Error(w, err.Error(), 500)
-		}
 	})
 
-	http.HandleFunc("/submit", func(w http.ResponseWriter, r *http.Request) {
+	r.POST("/submit", func(c *gin.Context) {
-		if err := r.ParseForm(); err != nil {
+		tx := c.PostForm("tx")
-			http.Error(w, err.Error(), 400)
-			return
-		}
-
-		tx := r.FormValue("tx")
 		if err := appendToFile(tx); err != nil {
-			http.Error(w, err.Error(), 500)
+			c.AbortWithError(500, err)
 			return
 		}
 
-		if err := htmlTpl.ExecuteTemplate(w, "success.html", struct {
+		c.HTML(200, "success.html", struct {
 			Tx string
-		}{tx}); err != nil {
+		}{tx})
-			http.Error(w, err.Error(), 500)
-		}
 	})
 
-	http.HandleFunc("/exec", func(w http.ResponseWriter, r *http.Request) {
+	r.GET("/exec", func(c *gin.Context) {
-		name := r.FormValue("name")
+		name, _ := c.GetQuery("name")
-		if err := executeScript(w, name); err != nil {
+		if err := executeScript(c.Writer, name); err != nil {
-			http.Error(w, err.Error(), 500)
+			c.AbortWithError(500, err)
 			log.Println(err)
 			return
 		}
 	})
 
-	log.Printf("Listen on %s", HOST)
+	log.Fatal(r.Run(HOST))
-	log.Fatal(http.ListenAndServe(HOST, nil))
 }
 
-func newTx(params url.Values) (result string, err error) {
+func newTx(data TxData) (result string, err error) {
-	action := params.Get("action")
+	data.Date = time.Now().Format("2006/01/02")
-	data := TxData{
-		Date:    time.Now().Format("2006/01/02"),
-		Amount:  params.Get("amount"),
-		Account: params.Get("account"),
-		Name:    params.Get("name"),
-	}
 	var buf bytes.Buffer
-	err = ledgerTpl.ExecuteTemplate(&buf, action, data)
+	err = ledgerTpl.ExecuteTemplate(&buf, data.Action, data)
 	return buf.String(), nil
 }
 

template.go

@@ -0,0 +1,27 @@
+package main
+
+import (
+	"path"
+	"path/filepath"
+
+	"github.com/gin-contrib/multitemplate"
+)
+
+func loadTemplates(templatesDir string) multitemplate.Renderer {
+	r := multitemplate.NewRenderer()
+
+	layouts, err := filepath.Glob(path.Join(templatesDir, "layouts", "*.html"))
+	if err != nil {
+		panic(err)
+	}
+
+	includes, err := filepath.Glob(path.Join(templatesDir, "*.html"))
+	if err != nil {
+		panic(err)
+	}
+
+	for _, include := range includes {
+		r.AddFromFiles(filepath.Base(include), append(layouts, include)...)
+	}
+	return r
+}

templates/index.html

@@ -1,27 +1,20 @@
-<!DOCTYPE html>
+{{ define "main" }}
-<html>
+<h1>Ledger Quick Note</h1>
-    <head>
+<form action="/new" method="POST">
-        <title>Ledger Quick Note</title>
+    <label>Action: 
-        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+        {{ range .Templates }}
-    </head>
+        <input type="radio" name="action" value="{{ .Name }}">{{ .Name }}</option>
-    <body>
+        {{ end }}
-        <h1>Ledger Quick Note</h1>
+    </label><br>
-        <form action="/new" method="POST">
+    <label>Amount: <input name="amount" type="number"></label><br>
-            <label>Action: 
+    <label>Account: <input name="account" type="text"></label></br>
-                {{ range .Templates }}
+    <label>Tx Name: <input name="name" type="text"></label></br>
-                <input type="radio" name="action" value="{{ .Name }}">{{ .Name }}</option>
+    <input type="submit">
-                {{ end }}
+</form>
-                </label><br>
+<h2>Scripts</h2>
-            <label>Amount: <input name="amount" type="number"></label><br>
+<ul>
-            <label>Account: <input name="account" type="text"></label></br>
+    {{ range $k, $v := .Scripts }}
-            <label>Tx Name: <input name="name" type="text"></label></br>
+    <li><a href="/exec?name={{ $k }}">{{ $k }}</a></li>
-            <input type="submit">
+    {{ end }}
-        </form>
+</ul>
-        <h2>Scripts</h2>
+{{ end }}
-        <ul>
-            {{ range $k, $v := .Scripts }}
-            <li><a href="/exec?name={{ $k }}">{{ $k }}</a></li>
-            {{ end }}
-        </ul>
-    </body>
-</html>

templates/layouts/base.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html>
+    <head>
+        <title>{{ block "title" . }}Ledger Quick Note{{ end }}</title>
+        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    </head>
+    <body>
+        {{ block "main" . }}
+
+        {{ end }}
+    </body>
+</html>

templates/new.html

@@ -1,14 +1,8 @@
-<!DOCTYPE html>
+{{ define "title" }}Confirm{{ end }}
-<html>
+{{ define "main" }}
-    <head>
+<h1>Confirm new Tx</h1>
-        <title>Ledger Quick Note</title>
+<form action="/submit" method="POST">
-        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <textarea name="tx" rows="15" cols="40">{{ .Tx }}</textarea><br>
-    </head>
+    <input type="submit">
-    <body>
+</form>
-        <h1>Confirm new Tx</h1>
+{{ end }}
-        <form action="/submit" method="POST">
-            <textarea name="tx" rows="15" cols="40">{{ .Tx }}</textarea><br>
-            <input type="submit">
-        </form>
-    </body>
-</html>

templates/success.html

@@ -1,13 +1,6 @@
-<!DOCTYPE html>
+{{ define "title" }}Success{{ end }}
-<html>
+{{ define "main" }}
-    <head>
+<p><strong>Success</strong></p>
-        <title>Ledger Quick Note</title>
+<pre><code>{{ .Tx }}</code></pre>
-        <meta name="viewport" content="width=device-width, initial-scale=1.0">
+<p><a href="/">Back to home</a></p>
-    </head>
+{{ end }}
-    <body>
-        <h1>Ledger Quick Note</h1>
-        <p><strong>Success</strong></p>
-        <pre><code>{{ .Tx }}</code></pre>
-        <p><a href="/">Back to home</a></p>
-    </body>
-</html>