3 files changed, 85 insertions, 5 deletions
diff --git a/sklad/db.go b/sklad/db.go
index aae695f..def18a5 100644
--- a/sklad/db.go
+++ b/sklad/db.go
@@ -7,6 +7,8 @@ import (
 	"os"
 	"strings"
 	"time"
+
+	"janouch.name/sklad/bdf"
 )
 
 type Series struct {
@@ -46,6 +48,9 @@ type Database struct {
 	Prefix     string       // prefix for all container IDs
 	Series     []*Series    // all known series
 	Containers []*Container // all known containers
+
+	BDFPath  string // path to bitmap font file
+	BDFScale int    // integer scaling for the bitmap font
 }
 
 var (
@@ -57,6 +62,8 @@ var (
 	indexSeries    = map[string]*Series{}
 	indexContainer = map[ContainerId]*Container{}
 	indexChildren  = map[ContainerId][]*Container{}
+
+	labelFont *bdf.Font
 )
 
 // TODO: Some functions to add, remove and change things in the database.
@@ -192,6 +199,20 @@ func loadDatabase() error {
 		}
 	}
 
+	// Prepare label printing.
+	if db.BDFScale <= 0 {
+		db.BDFScale = 1
+	}
+
+	if f, err := os.Open(db.BDFPath); err != nil {
+		return fmt.Errorf("cannot load label font: %s", err)
+	} else {
+		defer f.Close()
+		if labelFont, err = bdf.NewFromBDF(f); err != nil {
+			return fmt.Errorf("cannot load label font: %s", err)
+		}
+	}
+
 	// Open database log file for appending.
 	if dbLog, err = os.OpenFile(dbPath+".log",
 		os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644); err != nil {
diff --git a/sklad/label.tmpl b/sklad/label.tmpl
new file mode 100644
index 0000000..da17c58
--- /dev/null
+++ b/sklad/label.tmpl
@@ -0,0 +1,13 @@
+{{ define "Title" }}Tisk štítku{{ end }}
+{{ define "Content" }}
+<h2>Tisk štítku pro {{ .Id }}</h2>
+
+{{ if .UnknownId }}
+<p>Neznámý obal.
+{{ else if .Error }}
+<p>Tisk selhal: {{ .Error }}
+{{ else }}
+<p>Tisk proběhl úspěšně.
+{{ end }}
+
+{{ end }}
diff --git a/sklad/main.go b/sklad/main.go
index 9df1fd5..9a7be68 100644
--- a/sklad/main.go
+++ b/sklad/main.go
@@ -1,6 +1,7 @@
 package main
 
 import (
+	"errors"
 	"html/template"
 	"io"
 	"log"
@@ -9,6 +10,10 @@ import (
 	"os"
 	"path/filepath"
 	"time"
+
+	"janouch.name/sklad/imgutil"
+	"janouch.name/sklad/label"
+	"janouch.name/sklad/ql"
 )
 
 var templates = map[string]*template.Template{}
@@ -170,18 +175,59 @@ func handleSearch(w http.ResponseWriter, r *http.Request) {
 	executeTemplate("search.tmpl", w, &params)
 }
 
+func printLabel(id string) error {
+	printer, err := ql.Open()
+	if err != nil {
+		return err
+	}
+	if printer == nil {
+		return errors.New("no suitable printer found")
+	}
+	defer printer.Close()
+
+	printer.StatusNotify = func(status *ql.Status) {
+		log.Printf("\x1b[1mreceived status\x1b[m\n%+v\n%s",
+			status[:], status)
+	}
+
+	if err := printer.Initialize(); err != nil {
+		return err
+	}
+	if err := printer.UpdateStatus(); err != nil {
+		return err
+	}
+
+	mediaInfo := ql.GetMediaInfo(
+		printer.LastStatus.MediaWidthMM(),
+		printer.LastStatus.MediaLengthMM(),
+	)
+	if mediaInfo == nil {
+		return errors.New("unknown media")
+	}
+
+	return printer.Print(&imgutil.LeftRotate{Image: label.GenLabelForHeight(
+		labelFont, id, mediaInfo.PrintAreaPins, db.BDFScale)})
+}
+
 func handleLabel(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodPost {
 		w.WriteHeader(http.StatusMethodNotAllowed)
 		return
 	}
 
-	id := r.FormValue("id")
-	_ = id
-
-	// TODO: See if such a container exists, print a label on the printer.
+	params := struct {
+		Id        string
+		UnknownId bool
+		Error     error
+	}{
+		Id: r.FormValue("id"),
+	}
 
-	params := struct{}{}
+	if c := indexContainer[ContainerId(params.Id)]; c == nil {
+		params.UnknownId = true
+	} else {
+		params.Error = printLabel(params.Id)
+	}
 
 	executeTemplate("label.tmpl", w, &params)
 }