home: allow disableing list

internal/config/config.go

@@ -24,7 +24,7 @@ type Config struct {
 	Listen ListenConfig `yaml:"listen" recurse:"true"`
 	Paths  PathsConfig  `yaml:"paths" recurse:"true"`
 	HTTP   HTTPConfig   `yaml:"http" recurse:"true"`
-	Theme  ThemeConfig  `yaml:"theme" recurse:"true"`
+	Home   HomeConfig   `yaml:"home" recurse:"true"`
 	Docker DockerConfig `yaml:"docker" recurse:"true"`
 
 	SQL SQLConfig `yaml:"sql" recurse:"true"`

internal/config/config.yml

@@ -39,10 +39,24 @@ http:
   # This email address can be configured here. 
   certbot_email: null
 
-# By default, the default domain redirects to the distillery repository. 
-# If you want to change this, set an alternate domain name here. 
-theme:
-  home: null
+# Configuration for the (public) homepage of the distillery.
+home:
+  # the url to redirect to for more information about this instance of the distillery.
+  # to be configured by default.
+  redirect: null
+  
+  # configure the list of systems on the homepage.
+  list:
+    # is the list of WissKIs visible for the public?
+    # if this is disabled, only the generic text is shown.
+    public: null
+
+    # is the list of WissKIs visible to logged in users?
+    # if this is disabled, only the generic text is shown.
+    private: null
+
+    # Title of the list (whenever it is shown)
+    title: null
 
 docker:
   # The distillery uses several global docker networks.

internal/config/home.go

@@ -2,9 +2,17 @@ package config
 
 import "github.com/FAU-CDI/wisski-distillery/internal/config/validators"
 
-// ThemeConfig determines theming options
-type ThemeConfig struct {
-	// By default, the default domain redirects to the distillery repository.
-	// If you want to change this, set an alternate domain name here.
-	SelfRedirect *validators.URL `yaml:"home" default:"https://github.com/FAU-CDI/wisski-distillery" validate:"https"`
+// HomeConfig determines options for the homepage of the distillery
+type HomeConfig struct {
+	SelfRedirect *validators.URL `yaml:"redirect" default:"https://github.com/FAU-CDI/wisski-distillery" validate:"https"`
+	List         HomeListConfig  `yaml:"list" recurse:"true"`
+}
+
+type HomeListConfig struct {
+	// Is the list enabled for public visits?
+	Public validators.NullableBool `yaml:"public" default:"true" validate:"bool"`
+	// Is the list enabled for signed-in visits?
+	Private validators.NullableBool `yaml:"private" default:"true" validate:"bool"`
+	// Title of the list whenever it is shown
+	Title string `yaml:"title" default:"WissKIs on this Distillery" validate:"nonempty"`
 }

internal/config/validators/bool.go

@@ -0,0 +1,41 @@
+package validators
+
+import (
+	"strconv"
+
+	"gopkg.in/yaml.v3"
+)
+
+// NullableBool represents a bool that can be null
+type NullableBool struct {
+	Null, Value bool
+}
+
+func (nb *NullableBool) UnmarshalYAML(value *yaml.Node) error {
+	nb.Null = false
+	if err := value.Decode(&nb.Value); err != nil {
+		nb.Null = true
+		nb.Value = false
+	}
+
+	return nil
+}
+
+func (nb *NullableBool) MarshalYAML() (interface{}, error) {
+	if nb.Null {
+		return nil, nil
+	}
+	return nb.Value, nil
+}
+
+func ValidateBool(value *NullableBool, dflt string) (err error) {
+	if value.Null {
+		res, err := strconv.ParseBool(dflt)
+		if err != nil {
+			return err
+		}
+		value.Null = false
+		value.Value = res
+	}
+	return err
+}

internal/config/validators/collection.go

@@ -10,6 +10,8 @@ func New() validator.Collection {
 
 	validator.Add(coll, "nonempty", ValidateNonempty)
 
+	validator.Add(coll, "bool", ValidateBool)
+
 	validator.Add(coll, "directory", ValidateDirectory)
 	validator.Add(coll, "file", ValidateFile)
 

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

@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/auth"
 	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/instances"
 	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/templating"
 	"github.com/FAU-CDI/wisski-distillery/internal/status"
@@ -17,6 +18,7 @@ type Home struct {
 	Dependencies struct {
 		Templating *templating.Templating
 		Instances  *instances.Instances
+		Auth       *auth.Auth
 	}
 
 	instanceNames lazy.Lazy[map[string]struct{}] // instance names

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

@@ -28,7 +28,8 @@ var aboutTemplate = template.Must(template.New("about.html").Parse(aboutHTML))
 
 // aboutContext is passed to about.html
 type aboutContext struct {
-	Instances    []status.WissKI
+	Instances    []status.WissKI // list of WissKI Instancaes
+	SignedIn     bool            // is there a signed in user?
 	Logo         template.HTML
 	SelfRedirect string
 }
@@ -38,6 +39,10 @@ type publicContext struct {
 	templating.RuntimeFlags
 
 	aboutContext
+
+	ListEnabled bool   // is the list of instances enabled?
+	ListTitle   string // what is the title of the list of instances?
+
 	About template.HTML
 }
 
@@ -66,7 +71,11 @@ func (home *Home) publicHandler(ctx context.Context) http.Handler {
 		// prepare about
 		pc.aboutContext.Logo = logoHTML
 		pc.aboutContext.Instances = home.homeInstances.Get(nil)
-		pc.aboutContext.SelfRedirect = home.Config.Theme.SelfRedirect.String()
+		pc.aboutContext.SelfRedirect = home.Config.Home.SelfRedirect.String()
+		{
+			user, _ := home.Dependencies.Auth.UserOf(r)
+			pc.aboutContext.SignedIn = user != nil
+		}
 
 		// render the about template
 
@@ -77,6 +86,17 @@ 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
+		}
+
+		// title of the list
+		pc.ListTitle = home.Config.Home.List.Title
+
 		return
 	})
 }

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

@@ -1,7 +1,8 @@
 {{ .About }}
 
+{{ if .ListEnabled }}
     <div class="pure-u-1">
-    <h2>WissKIs on this Distillery</h2>
+        <h2>{{ .ListTitle }}</h2>
     </div>
 
     {{range .Instances}}
@@ -23,3 +24,4 @@
             </div>
         {{ end }}
     {{ end }}
+{{ end }}

program.go

@@ -59,6 +59,12 @@ var errUserIsNotRoot = exit.Error{
 	Message:  "this command has to be executed as root. the current user is not root",
 }
 
+// an error when cgo is enabled
+var errCGoEnabled = exit.Error{
+	ExitCode: exit.ExitGeneralArguments,
+	Message:  "this command has to be executed as root. the current user is not root",
+}
+
 const warnNoDeployWdcli = "Warning: Not using %q executable at %q. This might leave the distillery in an inconsistent state. \n"
 
 func NewProgram() Program {