sklad: link to container in print confirmation

cmd/sklad/container.tmpl

@@ -36,9 +36,9 @@
 </header>
 
 <form method=post action="container?id={{ .Container.Id }}">
-<textarea name=description rows=5>
-{{ .Container.Description }}
-</textarea>
+<textarea name=description rows="{{ max 5 (lines .Container.Description) }}"
+	placeholder="Popis obalu nebo jeho obsahu">
+{{ .Container.Description }}</textarea>
 <footer>
 	<div>
 		<label for=series>Řada:</label>

cmd/sklad/label.tmpl

@@ -1,6 +1,6 @@
 {{ define "Title" }}Tisk štítku{{ end }}
 {{ define "Content" }}
-<h2>Tisk štítku pro {{ .Id }}</h2>
+<h2>Tisk štítku pro <a href="container?id={{ .Id }}">{{ .Id }}</a></h2>
 
 {{ if .UnknownId }}
 <p>Neznámý obal.

cmd/sklad/main.go

@@ -11,6 +11,7 @@ import (
 	"os"
 	"path"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"janouch.name/sklad/imgutil"
@@ -73,9 +74,9 @@ func handleLogout(w http.ResponseWriter, r *http.Request) {
 
 func handleContainerPost(r *http.Request) error {
 	id := ContainerId(r.FormValue("id"))
-	description := r.FormValue("description")
+	description := strings.TrimSpace(r.FormValue("description"))
 	series := r.FormValue("series")
-	parent := ContainerId(r.FormValue("parent"))
+	parent := ContainerId(strings.TrimSpace(r.FormValue("parent")))
 	_, remove := r.Form["remove"]
 
 	if container, ok := indexContainer[id]; ok {
@@ -150,8 +151,8 @@ func handleContainer(w http.ResponseWriter, r *http.Request) {
 }
 
 func handleSeriesPost(r *http.Request) error {
-	prefix := r.FormValue("prefix")
-	description := r.FormValue("description")
+	prefix := strings.TrimSpace(r.FormValue("prefix"))
+	description := strings.TrimSpace(r.FormValue("description"))
 	_, remove := r.Form["remove"]
 
 	if series, ok := indexSeries[prefix]; ok {
@@ -333,6 +334,18 @@ func handle(w http.ResponseWriter, r *http.Request) {
 	}
 }
 
+var funcMap = template.FuncMap{
+	"max": func(i, j int) int {
+		if i > j {
+			return i
+		}
+		return j
+	},
+	"lines": func(s string) int {
+		return strings.Count(s, "\n") + 1
+	},
+}
+
 func main() {
 	// Randomize the RNG for session string generation.
 	rand.Seed(time.Now().UnixNano())
@@ -355,7 +368,8 @@ func main() {
 		log.Fatalln(err)
 	}
 	for _, name := range m {
-		templates[name] = template.Must(template.ParseFiles("base.tmpl", name))
+		templates[name] = template.Must(template.New("base.tmpl").
+			Funcs(funcMap).ParseFiles("base.tmpl", name))
 	}
 
 	http.HandleFunc("/", handle)