V0.38.2 library packages (#235)

Co-authored-by: gobha <jasafpro@gmail.com>
Co-committed-by: gobha <jasafpro@gmail.com>

server/handlers/dependencies.go

@@ -0,0 +1,69 @@
+package handlers
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+
+	"chat-switchboard/models"
+)
+
+// ── Extension Dependencies (v0.38.2) ──────────────────
+// Admin-only read endpoints for dependency graph visibility.
+// Dependencies are created/deleted implicitly by InstallPackage/DeletePackage.
+
+// ListDependencies returns all libraries that a package depends on.
+// GET /api/v1/admin/packages/:id/dependencies
+func (h *PackageHandler) ListDependencies(c *gin.Context) {
+	id := c.Param("id")
+	if h.stores.Dependencies == nil {
+		c.JSON(http.StatusOK, gin.H{"data": []any{}})
+		return
+	}
+	deps, err := h.stores.Dependencies.ListByConsumer(c.Request.Context(), id)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list dependencies"})
+		return
+	}
+	if deps == nil {
+		deps = []models.ExtDependency{}
+	}
+	c.JSON(http.StatusOK, gin.H{"data": deps})
+}
+
+// ListConsumers returns all packages that depend on a library.
+// GET /api/v1/admin/packages/:id/consumers
+func (h *PackageHandler) ListConsumers(c *gin.Context) {
+	id := c.Param("id")
+	if h.stores.Dependencies == nil {
+		c.JSON(http.StatusOK, gin.H{"data": []any{}})
+		return
+	}
+	deps, err := h.stores.Dependencies.ListByLibrary(c.Request.Context(), id)
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list consumers"})
+		return
+	}
+	if deps == nil {
+		deps = []models.ExtDependency{}
+	}
+	c.JSON(http.StatusOK, gin.H{"data": deps})
+}
+
+// ListAllDependencies returns the full dependency graph.
+// GET /api/v1/admin/dependencies
+func (h *PackageHandler) ListAllDependencies(c *gin.Context) {
+	if h.stores.Dependencies == nil {
+		c.JSON(http.StatusOK, gin.H{"data": []any{}})
+		return
+	}
+	deps, err := h.stores.Dependencies.ListAll(c.Request.Context())
+	if err != nil {
+		c.JSON(http.StatusInternalServerError, gin.H{"error": "failed to list dependencies"})
+		return
+	}
+	if deps == nil {
+		deps = []models.ExtDependency{}
+	}
+	c.JSON(http.StatusOK, gin.H{"data": deps})
+}