cups: add comprehensive CUPs setting page

- Add printers
- Delete printers
- Use polkit APIs as fallback on auth errors
- Fix ref system to conditionally subscribe to cups when wanted

core/internal/server/cups/pkhelper_test.go

@@ -0,0 +1,95 @@
+package cups
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func TestParseDevicesMap(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    map[string]string
+		wantLen  int
+		wantURIs []string
+	}{
+		{
+			name:     "empty",
+			input:    map[string]string{},
+			wantLen:  0,
+			wantURIs: nil,
+		},
+		{
+			name: "single_device",
+			input: map[string]string{
+				"device-uri:0":            "usb://HP/LaserJet",
+				"device-class:0":          "direct",
+				"device-info:0":           "HP LaserJet",
+				"device-make-and-model:0": "HP LaserJet 1020",
+				"device-id:0":             "MFG:HP;MDL:LaserJet",
+			},
+			wantLen:  1,
+			wantURIs: []string{"usb://HP/LaserJet"},
+		},
+		{
+			name: "multiple_devices",
+			input: map[string]string{
+				"device-uri:0":   "usb://HP/LaserJet",
+				"device-class:0": "direct",
+				"device-info:0":  "HP LaserJet",
+				"device-uri:1":   "socket://192.168.1.100",
+				"device-class:1": "network",
+				"device-info:1":  "Network Printer",
+			},
+			wantLen:  2,
+			wantURIs: []string{"usb://HP/LaserJet", "socket://192.168.1.100"},
+		},
+		{
+			name: "malformed_key",
+			input: map[string]string{
+				"no-colon-here": "value",
+			},
+			wantLen:  0,
+			wantURIs: nil,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := parseDevicesMap(tt.input)
+			assert.Len(t, got, tt.wantLen)
+
+			if tt.wantURIs != nil {
+				gotURIs := make(map[string]bool)
+				for _, d := range got {
+					gotURIs[d.URI] = true
+				}
+				for _, uri := range tt.wantURIs {
+					assert.True(t, gotURIs[uri], "expected URI %s not found", uri)
+				}
+			}
+		})
+	}
+}
+
+func TestParseDevicesMap_Attributes(t *testing.T) {
+	input := map[string]string{
+		"device-uri:0":            "usb://HP/LaserJet",
+		"device-class:0":          "direct",
+		"device-info:0":           "HP LaserJet",
+		"device-make-and-model:0": "HP LaserJet 1020",
+		"device-id:0":             "MFG:HP;MDL:LaserJet",
+		"device-location:0":       "USB Port",
+	}
+
+	got := parseDevicesMap(input)
+	assert.Len(t, got, 1)
+
+	dev := got[0]
+	assert.Equal(t, "usb://HP/LaserJet", dev.URI)
+	assert.Equal(t, "direct", dev.Class)
+	assert.Equal(t, "HP LaserJet", dev.Info)
+	assert.Equal(t, "HP LaserJet 1020", dev.MakeModel)
+	assert.Equal(t, "MFG:HP;MDL:LaserJet", dev.ID)
+	assert.Equal(t, "USB Port", dev.Location)
+}