update databasing system with minimum API, schema parsing and FreeCAD

integration

internal/api/web.go

@@ -0,0 +1,92 @@
+package api
+
+import (
+	"bytes"
+	"embed"
+	"html/template"
+	"net/http"
+
+	"github.com/rs/zerolog"
+)
+
+//go:embed templates/*.html
+var templatesFS embed.FS
+
+// WebHandler serves HTML pages.
+type WebHandler struct {
+	templates *template.Template
+	logger    zerolog.Logger
+}
+
+// NewWebHandler creates a new web handler.
+func NewWebHandler(logger zerolog.Logger) (*WebHandler, error) {
+	// Parse templates from embedded filesystem
+	tmpl, err := template.ParseFS(templatesFS, "templates/*.html")
+	if err != nil {
+		return nil, err
+	}
+
+	return &WebHandler{
+		templates: tmpl,
+		logger:    logger,
+	}, nil
+}
+
+// PageData holds data for page rendering.
+type PageData struct {
+	Title string
+	Page  string
+	Data  any
+}
+
+// render executes a page template within the base layout.
+func (h *WebHandler) render(w http.ResponseWriter, page string, data PageData) {
+	// First, render the page-specific content
+	var contentBuf bytes.Buffer
+	if err := h.templates.ExecuteTemplate(&contentBuf, page+".html", data); err != nil {
+		h.logger.Error().Err(err).Str("page", page).Msg("failed to render page template")
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+		return
+	}
+
+	// Now render the base template with the content
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if err := h.templates.ExecuteTemplate(w, "base.html", data); err != nil {
+		h.logger.Error().Err(err).Msg("failed to render base template")
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+	}
+}
+
+// HandleIndex serves the main items page.
+func (h *WebHandler) HandleIndex(w http.ResponseWriter, r *http.Request) {
+	// Check if this is the root path
+	if r.URL.Path != "/" {
+		http.NotFound(w, r)
+		return
+	}
+
+	data := PageData{
+		Title: "Items",
+		Page:  "items",
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if err := h.templates.ExecuteTemplate(w, "base.html", data); err != nil {
+		h.logger.Error().Err(err).Msg("failed to render template")
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+	}
+}
+
+// HandleSchemasPage serves the schemas page.
+func (h *WebHandler) HandleSchemasPage(w http.ResponseWriter, r *http.Request) {
+	data := PageData{
+		Title: "Schemas",
+		Page:  "schemas",
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if err := h.templates.ExecuteTemplate(w, "base.html", data); err != nil {
+		h.logger.Error().Err(err).Msg("failed to render template")
+		http.Error(w, "Internal Server Error", http.StatusInternalServerError)
+	}
+}