api: Begin implementing an API

internal/dis/component/server/home/api.go

@@ -0,0 +1,64 @@
+package home
+
+import (
+	"context"
+	"net/http"
+	"time"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/status"
+	"github.com/tkw1536/pkglib/httpx"
+)
+
+type API struct {
+	component.Base
+
+	Dependencies struct {
+		Home *Home
+	}
+}
+
+var (
+	_ component.Routeable = (*API)(nil)
+)
+
+func (api *API) Routes() component.Routes {
+	return component.Routes{
+		Prefix:    "/api/v1/systems",
+		Exact:     true,
+		Decorator: api.Config.HTTP.APIDecorator("GET"),
+	}
+}
+
+type APISystemInfo struct {
+	Slug    string
+	URL     string
+	Tagline string
+
+	EntityCount int
+	BundleCount int
+	LastEdit    time.Time
+}
+
+func (api *API) HandleRoute(ctx context.Context, path string) (http.Handler, error) {
+	return httpx.JSON(func(r *http.Request) ([]APISystemInfo, error) {
+		var statuses []status.WissKI
+		if api.Dependencies.Home.ShouldShowList(r) {
+			statuses = api.Dependencies.Home.homeInstances.Get(nil)
+		}
+
+		if len(statuses) == 0 {
+			return []APISystemInfo{}, nil
+		}
+
+		infos := make([]APISystemInfo, len(statuses))
+		for i, status := range statuses {
+			infos[i].Slug = status.Slug
+			infos[i].URL = status.URL
+			infos[i].EntityCount = status.Statistics.Bundles.TotalCount()
+			infos[i].BundleCount = status.Statistics.Bundles.TotalBundles
+			infos[i].LastEdit = status.Statistics.Bundles.LastEdit().Time
+		}
+		return infos, nil
+	}), nil
+}

internal/dis/component/server/home/public.go

@@ -29,7 +29,6 @@ var aboutTemplate = template.Must(template.New("about.html").Parse(aboutHTML))
 // aboutContext is passed to about.html
 type aboutContext struct {
 	Instances    []status.WissKI // list of WissKI Instancaes
-	SignedIn     bool            // is there a signed in user?
 	Logo         template.HTML
 	SelfRedirect string
 }
@@ -48,6 +47,23 @@ type publicContext struct {
 
 const logoHTML = template.HTML(`<img src="/logo.svg" alt="WissKI Distillery Logo" class="biglogo">`)
 
+// ShouldShowList determines if the given request should show a WissKI list
+func (home *Home) ShouldShowList(r *http.Request) bool {
+	allowPrivate := home.Config.Home.List.Private.Value
+	allowPublic := home.Config.Home.List.Public.Value
+
+	if allowPrivate == allowPublic {
+		return allowPrivate
+	}
+
+	user, _ := home.Dependencies.Auth.UserOf(r)
+	if user == nil {
+		return allowPublic
+	} else {
+		return allowPrivate
+	}
+}
+
 func (home *Home) publicHandler(ctx context.Context) http.Handler {
 	title := home.Config.Home.Title
 
@@ -75,10 +91,6 @@ func (home *Home) publicHandler(ctx context.Context) http.Handler {
 		pc.aboutContext.Logo = logoHTML
 		pc.aboutContext.Instances = home.homeInstances.Get(nil)
 		pc.aboutContext.SelfRedirect = home.Config.Home.SelfRedirect.String()
-		{
-			user, _ := home.Dependencies.Auth.UserOf(r)
-			pc.aboutContext.SignedIn = user != nil
-		}
 
 		// render the about template
 
@@ -89,13 +101,8 @@ func (home *Home) publicHandler(ctx context.Context) http.Handler {
 		// and return about!
 		pc.About = template.HTML(builder.String())
 
-		// user is not signed in!
-
-		if pc.aboutContext.SignedIn {
-			pc.ListEnabled = home.Config.Home.List.Private.Value
-		} else {
-			pc.ListEnabled = home.Config.Home.List.Public.Value
-		}
+		// check if we should show the list of WissKIs
+		pc.ListEnabled = home.ShouldShowList(r)
 
 		// title of the list
 		pc.ListTitle = home.Config.Home.List.Title

internal/dis/component/server/news/api.go

@@ -0,0 +1,43 @@
+package news
+
+import (
+	"context"
+	"encoding/json"
+	"net/http"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/tkw1536/pkglib/httpx"
+)
+
+type API struct {
+	component.Base
+}
+
+var (
+	_ component.Routeable = (*API)(nil)
+)
+
+func (api *API) Routes() component.Routes {
+	return component.Routes{
+		Prefix:    "/api/v1/news/",
+		Exact:     true,
+		Decorator: api.Config.HTTP.APIDecorator("GET"),
+	}
+}
+
+func (api *API) HandleRoute(ctx context.Context, path string) (http.Handler, error) {
+	items, err := Items()
+	if err != nil {
+		return nil, err
+	}
+
+	data, err := json.Marshal(items)
+	if err != nil {
+		return nil, err
+	}
+
+	return httpx.Response{
+		ContentType: "application/json",
+		Body:        data,
+	}, nil
+}

internal/dis/distillery.go

@@ -187,5 +187,9 @@ func (dis *Distillery) allComponents() []initFunc {
 		auto[*cron.Cron],
 		auto[*home.UpdateHome],
 		auto[*home.UpdateInstanceList],
+
+		// API
+		auto[*home.API],
+		auto[*news.API],
 	}
 }