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Added PDF Generation

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skruecken
2026-05-26 17:11:09 +02:00
parent c5d2e32355
commit af4c944de7
12 changed files with 525 additions and 34 deletions
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internal/server/admin/static/index.html
+65 -5
View File
@@ -68,6 +68,13 @@
}
button:hover { filter: brightness(1.1); }
button:disabled { opacity: 0.5; cursor: not-allowed; }
button.secondary {
background: transparent;
border: 1px solid var(--accent);
color: var(--accent);
}
button.secondary:hover { background: rgba(59, 130, 246, 0.12); filter: none; }
.btn-row { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 1rem; }
button.danger {
background: transparent;
border: 1px solid var(--err);
@@ -364,9 +371,15 @@
<input type="number" step="0.1" min="0" x-model.number="configForm.spacing_mm" @input="refreshLayoutPreview()">
</div>
</div>
<button type="submit" :disabled="configSaving || !configForm.plate_id || !configForm.item_id">
<span x-text="configSaving ? 'Speichere…' : 'Konfiguration speichern'"></span>
</button>
<div class="btn-row">
<button type="submit" :disabled="configSaving || !configForm.plate_id || !configForm.item_id">
<span x-text="configSaving ? 'Speichere…' : 'Konfiguration speichern'"></span>
</button>
<button type="button" class="secondary" @click="downloadLayoutPDF()"
:disabled="pdfGenerating || !layoutPreview || !configForm.plate_id || !configForm.item_id">
<span x-text="pdfGenerating ? 'PDF…' : 'PDF-Vorschau'"></span>
</button>
</div>
<p class="msg-err" x-show="configError" x-text="configError"></p>
<p class="msg-ok" x-show="configSuccess" x-text="configSuccess"></p>
</form>
@@ -377,7 +390,7 @@
<div class="layout-stats">
<span><strong x-text="layoutPreview.count"></strong> Items passen</span>
<span><strong x-text="layoutPreview.columns + ' × ' + layoutPreview.rows"></strong> Raster</span>
<span>Fußabdruck <strong x-text="layoutPreview.footprint_width_mm.toFixed(1) + ' mm'"></strong></span>
<span>Item <strong x-text="layoutPreview.footprint_width_mm.toFixed(1) + ' mm'"></strong></span>
<span>Zellenabstand <strong x-text="layoutPreview.cell_width_mm.toFixed(1) + ' mm'"></strong></span>
<span>Druckfläche <strong x-text="layoutPreview.printable_width_mm.toFixed(1) + ' × ' + layoutPreview.printable_height_mm.toFixed(1) + ' mm'"></strong></span>
</div>
@@ -399,7 +412,13 @@
<h3 x-text="c.name || ('Konfiguration ' + c.id.slice(0, 8))"></h3>
<p class="muted" x-text="configSummary(c)"></p>
</div>
<button type="button" class="danger" @click="deleteConfiguration(c.id)">Löschen</button>
<div class="row-actions">
<button type="button" class="secondary" @click="downloadConfigurationPDF(c.id)"
:disabled="pdfGenerating || !!c.preview_error" x-show="c.preview && !c.preview_error">
PDF
</button>
<button type="button" class="danger" @click="deleteConfiguration(c.id)">Löschen</button>
</div>
</header>
<p class="msg-err" x-show="c.preview_error" x-text="c.preview_error"></p>
<div class="layout-preview-wrap" x-show="c.preview && !c.preview_error">
@@ -486,6 +505,7 @@
},
layoutPreview: null,
layoutLoading: false,
pdfGenerating: false,
_layoutTimer: null,
apiUrl(path) {
@@ -714,6 +734,46 @@
}
},
async downloadBlob(path, filename) {
this.pdfGenerating = true;
this.configError = '';
try {
const res = await fetch(this.apiUrl(path));
if (!res.ok) {
let msg = res.statusText;
try {
const err = await res.json();
if (err.error) msg = err.error;
} catch (_) {}
throw new Error(msg);
}
const blob = await res.blob();
const url = URL.createObjectURL(blob);
const a = document.createElement('a');
a.href = url;
a.download = filename;
a.click();
URL.revokeObjectURL(url);
} catch (e) {
this.configError = String(e.message || e);
} finally {
this.pdfGenerating = false;
}
},
downloadLayoutPDF() {
const q = new URLSearchParams({
plate_id: this.configForm.plate_id,
item_id: this.configForm.item_id,
spacing_mm: String(Number(this.configForm.spacing_mm) || 0),
});
this.downloadBlob('/layout/pdf?' + q, 'layout-preview.pdf');
},
downloadConfigurationPDF(id) {
this.downloadBlob('/configurations/' + id + '/pdf', 'configuration-' + id.slice(0, 8) + '.pdf');
},
async deleteConfiguration(id) {
if (!confirm('Konfiguration wirklich löschen?')) return;
this.configError = '';
internal/server/api/configuration.go
+1
View File
@@ -18,6 +18,7 @@ func registerConfigurationRoutes(mux *http.ServeMux, configs *store.Configuratio
mux.HandleFunc("DELETE /configurations/{id}", deleteConfiguration(configs))
mux.HandleFunc("GET /configurations/{id}/preview", previewConfiguration(configs, plates, items))
mux.HandleFunc("GET /layout/preview", layoutPreview(plates, items))
registerPDFRoutes(mux, configs, plates, items)
}
type configurationResponse struct {
internal/server/api/pdf.go
+120
View File
@@ -0,0 +1,120 @@
package api
import (
"errors"
"fmt"
"net/http"
"printer.backend/internal/model"
"printer.backend/internal/platepdf"
"printer.backend/internal/store"
)
func registerPDFRoutes(mux *http.ServeMux, configs *store.ConfigurationStore, plates *store.PlateStore, items *store.ItemStore) {
mux.HandleFunc("GET /layout/pdf", layoutPDF(plates, items))
mux.HandleFunc("GET /configurations/{id}/pdf", configurationPDF(configs, plates, items))
}
func layoutPDF(plates *store.PlateStore, items *store.ItemStore) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
plateID := r.URL.Query().Get("plate_id")
itemID := r.URL.Query().Get("item_id")
if plateID == "" || itemID == "" {
writeError(w, http.StatusBadRequest, errors.New("plate_id and item_id query params are required"))
return
}
spacing, err := parseSpacing(r.URL.Query().Get("spacing_mm"))
if err != nil {
writeError(w, http.StatusBadRequest, err)
return
}
plate, item, preview, svgPath, err := resolveLayoutPDF(plates, items, plateID, itemID, spacing)
if err != nil {
writeError(w, http.StatusBadRequest, err)
return
}
pdf, err := platepdf.Generate(plate, item.Spec, svgPath, preview)
if err != nil {
writeError(w, http.StatusInternalServerError, err)
return
}
servePDF(w, pdf, "layout-preview.pdf")
}
}
func configurationPDF(configs *store.ConfigurationStore, plates *store.PlateStore, items *store.ItemStore) http.HandlerFunc {
return func(w http.ResponseWriter, r *http.Request) {
id := r.PathValue("id")
c, err := configs.Get(id)
if err != nil {
writeError(w, http.StatusNotFound, err)
return
}
plate, item, preview, svgPath, err := resolveLayoutPDF(plates, items, c.PlateID, c.ItemID, c.SpacingMM)
if err != nil {
writeError(w, http.StatusBadRequest, err)
return
}
pdf, err := platepdf.Generate(plate, item.Spec, svgPath, preview)
if err != nil {
writeError(w, http.StatusInternalServerError, err)
return
}
name := c.Name
if name == "" {
name = "configuration-" + id[:8]
}
servePDF(w, pdf, sanitizeFilename(name)+".pdf")
}
}
func resolveLayoutPDF(plates *store.PlateStore, items *store.ItemStore, plateID, itemID string, spacingMM float64) (
plate model.Plate, item model.Item, preview model.LayoutPreview, svgPath string, err error,
) {
plate, err = findPlate(plates, plateID)
if err != nil {
return plate, item, preview, "", err
}
item, err = items.Get(itemID)
if err != nil {
return plate, item, preview, "", err
}
svgPath, err = items.SVGPath(itemID)
if err != nil {
return plate, item, preview, "", err
}
preview, err = buildPreview(plates, items, plateID, itemID, spacingMM)
if err != nil {
return plate, item, preview, "", err
}
preview.PlateID = plateID
preview.ItemID = itemID
return plate, item, preview, svgPath, nil
}
func servePDF(w http.ResponseWriter, pdf []byte, filename string) {
w.Header().Set("Content-Type", "application/pdf")
w.Header().Set("Content-Disposition", fmt.Sprintf(`attachment; filename="%s"`, filename))
w.Header().Set("Cache-Control", "no-cache")
_, _ = w.Write(pdf)
}
func sanitizeFilename(name string) string {
var b []byte
for i := 0; i < len(name); i++ {
c := name[i]
if (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') || (c >= '0' && c <= '9') || c == '-' || c == '_' {
b = append(b, c)
} else if c == ' ' {
b = append(b, '_')
}
}
if len(b) == 0 {
return "preview"
}
return string(b)
}