feat(webui): add partials, show backends associated to models (#1922)

* feat(webui): add partials, show backends associated to models

* fix(auth): put assistant and backend under auth

core/http/render.go

@@ -0,0 +1,80 @@
+package http
+
+import (
+	"embed"
+	"fmt"
+	"html/template"
+	"net/http"
+
+	"github.com/Masterminds/sprig/v3"
+	"github.com/go-skynet/LocalAI/core/config"
+	"github.com/go-skynet/LocalAI/core/schema"
+	"github.com/go-skynet/LocalAI/internal"
+	"github.com/go-skynet/LocalAI/pkg/model"
+	"github.com/gofiber/fiber/v2"
+	fiberhtml "github.com/gofiber/template/html/v2"
+	"github.com/russross/blackfriday"
+)
+
+//go:embed views/*
+var viewsfs embed.FS
+
+func notFoundHandler(c *fiber.Ctx) error {
+	// Check if the request accepts JSON
+	if string(c.Context().Request.Header.ContentType()) == "application/json" || len(c.Accepts("html")) == 0 {
+		// The client expects a JSON response
+		c.Status(fiber.StatusNotFound).JSON(schema.ErrorResponse{
+			Error: &schema.APIError{Message: "Resource not found", Code: fiber.StatusNotFound},
+		})
+	} else {
+		// The client expects an HTML response
+		c.Status(fiber.StatusNotFound).Render("views/404", fiber.Map{})
+	}
+	return nil
+}
+
+func welcomeRoute(
+	app *fiber.App,
+	cl *config.BackendConfigLoader,
+	ml *model.ModelLoader,
+	appConfig *config.ApplicationConfig,
+	auth func(*fiber.Ctx) error,
+) {
+	if appConfig.DisableWelcomePage {
+		return
+	}
+
+	models, _ := ml.ListModels()
+	backendConfigs := cl.GetAllBackendConfigs()
+
+	app.Get("/", auth, func(c *fiber.Ctx) error {
+		summary := fiber.Map{
+			"Title":             "LocalAI API - " + internal.PrintableVersion(),
+			"Version":           internal.PrintableVersion(),
+			"Models":            models,
+			"ModelsConfig":      backendConfigs,
+			"ApplicationConfig": appConfig,
+		}
+
+		if string(c.Context().Request.Header.ContentType()) == "application/json" || len(c.Accepts("html")) == 0 {
+			// The client expects a JSON response
+			return c.Status(fiber.StatusOK).JSON(summary)
+		} else {
+			// Render index
+			return c.Render("views/index", summary)
+		}
+	})
+
+}
+
+func renderEngine() *fiberhtml.Engine {
+	engine := fiberhtml.NewFileSystem(http.FS(viewsfs), ".html")
+	engine.AddFuncMap(sprig.FuncMap())
+	engine.AddFunc("MDToHTML", markDowner)
+	return engine
+}
+
+func markDowner(args ...interface{}) template.HTML {
+	s := blackfriday.MarkdownCommon([]byte(fmt.Sprintf("%s", args...)))
+	return template.HTML(s)
+}