Mikkel Georgsen
7800917500
- Add CableLabelData struct and RenderCable() producing 384x180 bitmap - Cable template: HW ID, name, USB version/speed, wattage/test date - IsCableDevice() detects cable records by name or AINotes heuristic - T-04-07 mitigation applied: HWID format validated in RenderCable too - All 5 cable tests pass (10 total in package)
80 lines
2.7 KiB
Go
80 lines
2.7 KiB
Go
package labels
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import (
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"fmt"
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"image"
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"image/color"
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"image/draw"
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"strings"
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"github.com/skip2/go-qrcode"
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"git.georgsen.dk/hwlab/internal/netbox"
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)
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const CableLabelHeight = 180
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// CableLabelData holds fields for the cable-specific label template (per LBL-03).
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type CableLabelData struct {
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HWID string // e.g. "HW-00042"
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Name string // e.g. "USB-C 2m Cable"
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USBVersion string // e.g. "USB 3.2 Gen 2"
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MaxSpeedGbps float64 // e.g. 10.0
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MaxWatts int // e.g. 100
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TestDate string // ISO 8601 or "" for "Not tested"
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}
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// RenderCable produces a 384x180 label bitmap for a cable item.
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// Layout: QR code left (96x96), text right with 4 lines:
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//
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// Line 1: HW ID
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// Line 2: Name (truncated)
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// Line 3: USB version + speed (e.g. "USB 3.2 Gen 2 / 10 Gbps")
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// Line 4: Max power + test date (e.g. "100W Tested: 2026-04-13")
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//
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// Returns an error if HWID does not match HW-\d{5} (T-04-07 mitigation).
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func RenderCable(d CableLabelData) (image.Image, error) {
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if !hwIDPattern.MatchString(d.HWID) {
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return nil, fmt.Errorf("labels: invalid HWID %q: must match HW-NNNNN", d.HWID)
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}
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if d.Name == "" {
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d.Name = "Unknown Cable"
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}
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testDateStr := d.TestDate
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if testDateStr == "" {
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testDateStr = "Not tested"
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}
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img := image.NewNRGBA(image.Rect(0, 0, LabelWidth, CableLabelHeight))
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draw.Draw(img, img.Bounds(), image.NewUniform(color.NRGBA{R: 255, G: 255, B: 255, A: 255}), image.Point{}, draw.Src)
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// QR code — vertically centered in 180px height
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qr, err := qrcode.New(BaseURL+d.HWID, qrcode.Low)
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if err != nil {
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return nil, fmt.Errorf("labels: QR generation failed: %w", err)
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}
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qr.DisableBorder = true
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qrImg := qr.Image(QRSize)
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qrOffsetY := (CableLabelHeight - QRSize) / 2
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qrDst := image.Rect(QROffsetX, qrOffsetY, QROffsetX+QRSize, qrOffsetY+QRSize)
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draw.Draw(img, qrDst, qrImg, image.Point{}, draw.Over)
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// Text lines (4 lines across 180px height)
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drawText(img, TextOffsetX, 30, d.HWID)
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drawText(img, TextOffsetX, 62, truncate(d.Name, 30))
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speedLine := fmt.Sprintf("%s / %.0f Gbps", d.USBVersion, d.MaxSpeedGbps)
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drawText(img, TextOffsetX, 94, truncate(speedLine, 30))
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powerLine := fmt.Sprintf("%dW Tested: %s", d.MaxWatts, testDateStr)
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drawText(img, TextOffsetX, 126, truncate(powerLine, 30))
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return img, nil
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}
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// IsCableDevice returns true if the NetBox device record represents a cable.
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// Detection: Name contains "cable" (case-insensitive) OR AINotes contains "cable".
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// This is a heuristic — real cable detection uses device_type in Phase 5.
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func IsCableDevice(d netbox.Device) bool {
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nameLower := strings.ToLower(d.Name)
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notesLower := strings.ToLower(d.CustomFields.AINotes)
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return strings.Contains(nameLower, "cable") || strings.Contains(notesLower, "cable")
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}
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