feat: add teaching asset prompts

internal/httpapi/teaching_assets.go

@@ -0,0 +1,47 @@
+package httpapi
+
+import (
+	"encoding/json"
+	"net/http"
+
+	"tutor/internal/teachingassets"
+	"tutor/internal/workflows"
+)
+
+type generateTeachingAssetPromptRequest struct {
+	ConceptID string              `json:"concept_id"`
+	AssetType workflows.AssetType `json:"asset_type"`
+}
+
+func (h Handler) generateTeachingAssetPrompt(w http.ResponseWriter, r *http.Request) {
+	if h.assets == nil {
+		writeError(w, http.StatusNotFound, "teaching assets not configured")
+		return
+	}
+
+	var req generateTeachingAssetPromptRequest
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		writeError(w, http.StatusBadRequest, "invalid JSON body")
+		return
+	}
+
+	prompt, err := h.assets.GeneratePrompt(teachingassets.GenerateInput{
+		ConceptID: req.ConceptID,
+		AssetType: req.AssetType,
+	})
+	if err != nil {
+		writeError(w, http.StatusBadRequest, err.Error())
+		return
+	}
+
+	writeJSON(w, http.StatusCreated, prompt)
+}
+
+func (h Handler) getTeachingAssets(w http.ResponseWriter, _ *http.Request) {
+	if h.assets == nil {
+		writeError(w, http.StatusNotFound, "teaching assets not configured")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, h.assets.Snapshot())
+}