Init site config DB, login required middleware

core/admin.go

@@ -3,10 +3,17 @@ package core
 import (
 	"net/http"
 
+	"github.com/gorilla/sessions"
 	"github.com/kirsle/blog/core/forms"
+	"github.com/kirsle/blog/core/models/settings"
 	"github.com/kirsle/blog/core/models/users"
 )
 
+// AdminHandler is the admin landing page.
+func (b *Blog) AdminHandler(w http.ResponseWriter, r *http.Request) {
+	b.RenderTemplate(w, r, "admin/index", nil)
+}
+
 // SetupHandler is the initial blog setup route.
 func (b *Blog) SetupHandler(w http.ResponseWriter, r *http.Request) {
 	vars := &Vars{
@@ -24,6 +31,14 @@ func (b *Blog) SetupHandler(w http.ResponseWriter, r *http.Request) {
 		if err != nil {
 			vars.Error = err
 		} else {
+			// Save the site config.
+			log.Info("Creating default website config file")
+			s := settings.Defaults()
+			s.Save()
+
+			// Re-initialize the cookie store with the new secret key.
+			b.store = sessions.NewCookieStore([]byte(s.Security.SecretKey))
+
 			log.Info("Creating admin account %s", form.Username)
 			user := &users.User{
 				Username: form.Username,
@@ -38,6 +53,7 @@ func (b *Blog) SetupHandler(w http.ResponseWriter, r *http.Request) {
 			}
 
 			// All set!
+			b.Login(w, r, user)
 			b.Redirect(w, "/admin")
 			return
 		}

core/app.go

@@ -7,6 +7,7 @@ import (
 	"github.com/gorilla/mux"
 	"github.com/gorilla/sessions"
 	"github.com/kirsle/blog/core/jsondb"
+	"github.com/kirsle/blog/core/models/settings"
 	"github.com/kirsle/blog/core/models/users"
 	"github.com/urfave/negroni"
 )
@@ -34,16 +35,36 @@ func New(documentRoot, userRoot string) *Blog {
 		DocumentRoot: documentRoot,
 		UserRoot:     userRoot,
 		DB:           jsondb.New(filepath.Join(userRoot, ".private")),
-
-		store: sessions.NewCookieStore([]byte("secret-key")), // TODO configurable!
 	}
 
-	// Initialize all the models.
+	// Load the site config, or start with defaults if not found.
+	settings.DB = blog.DB
+	config, err := settings.Load()
+	if err != nil {
+		config = settings.Defaults()
+	}
+
+	// Initialize the session cookie store.
+	blog.store = sessions.NewCookieStore([]byte(config.Security.SecretKey))
+	users.HashCost = config.Security.HashCost
+
+	// Initialize the rest of the models.
 	users.DB = blog.DB
 
+	// Initialize the router.
 	r := mux.NewRouter()
 	blog.r = r
+
+	// Blog setup.
 	r.HandleFunc("/admin/setup", blog.SetupHandler)
+
+	// Admin pages that require a logged-in user.
+	admin := mux.NewRouter()
+	admin.HandleFunc("/admin", blog.AdminHandler)
+	r.PathPrefix("/admin").Handler(negroni.New(
+		negroni.HandlerFunc(blog.LoginRequired),
+		negroni.Wrap(admin),
+	))
 	r.HandleFunc("/login", blog.LoginHandler)
 	r.HandleFunc("/logout", blog.LogoutHandler)
 	r.HandleFunc("/", blog.PageHandler)

core/auth.go

@@ -1,7 +1,6 @@
 package core
 
 import (
-	"context"
 	"errors"
 	"net/http"
 
@@ -15,24 +14,16 @@ const (
 	userKey key = iota
 )
 
-// AuthMiddleware loads the user's authentication state.
-func (b *Blog) AuthMiddleware(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
-	session, _ := b.store.Get(r, "session")
-	log.Info("Session: %v", session.Values)
-	if loggedIn, ok := session.Values["logged-in"].(bool); ok && loggedIn {
-		// They seem to be logged in. Get their user object.
-		id := session.Values["user-id"].(int)
-		u, err := users.Load(id)
+// Login logs the browser in as the given user.
+func (b *Blog) Login(w http.ResponseWriter, r *http.Request, u *users.User) error {
+	session, err := b.store.Get(r, "session") // TODO session name
 	if err != nil {
-			log.Error("Error loading user ID %d from session: %v", id, err)
-			next(w, r)
-			return
+		return err
 	}
-
-		ctx := context.WithValue(r.Context(), userKey, u)
-		next(w, r.WithContext(ctx))
-	}
-	next(w, r)
+	session.Values["logged-in"] = true
+	session.Values["user-id"] = u.ID
+	session.Save(r, w)
+	return nil
 }
 
 // LoginHandler shows and handles the login page.
@@ -58,18 +49,16 @@ func (b *Blog) LoginHandler(w http.ResponseWriter, r *http.Request) {
 			} else {
 				// Login OK!
 				vars.Flash = "Login OK!"
+				b.Login(w, r, user)
 
-				// Log in the user.
-				session, err := b.store.Get(r, "session") // TODO session name
-				if err != nil {
-					vars.Error = err
+				// A next URL given? TODO: actually get to work
+				next := r.FormValue("next")
+				log.Info("Redirect after login to: %s", next)
+				if len(next) > 0 && next[0] == '/' {
+					b.Redirect(w, next)
 				} else {
-					session.Values["logged-in"] = true
-					session.Values["user-id"] = user.ID
-					session.Save(r, w)
+					b.Redirect(w, "/")
 				}
-
-				b.Redirect(w, "/login")
 				return
 			}
 		}

core/middleware.go

@@ -0,0 +1,40 @@
+package core
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/kirsle/blog/core/models/users"
+)
+
+// AuthMiddleware loads the user's authentication state.
+func (b *Blog) AuthMiddleware(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	session, _ := b.store.Get(r, "session")
+	log.Info("Session: %v", session.Values)
+	if loggedIn, ok := session.Values["logged-in"].(bool); ok && loggedIn {
+		// They seem to be logged in. Get their user object.
+		id := session.Values["user-id"].(int)
+		u, err := users.Load(id)
+		if err != nil {
+			log.Error("Error loading user ID %d from session: %v", id, err)
+			next(w, r)
+			return
+		}
+
+		ctx := context.WithValue(r.Context(), userKey, u)
+		next(w, r.WithContext(ctx))
+	}
+	next(w, r)
+}
+
+// LoginRequired is a middleware that requires a logged-in user.
+func (b *Blog) LoginRequired(w http.ResponseWriter, r *http.Request, next http.HandlerFunc) {
+	ctx := r.Context()
+	if user, ok := ctx.Value(userKey).(*users.User); ok {
+		if user.ID > 0 {
+			next(w, r)
+		}
+	}
+
+	b.Redirect(w, "/login?next="+r.URL.Path)
+}

core/models/settings/settings.go

@@ -0,0 +1,84 @@
+package settings
+
+import (
+	"crypto/rand"
+	"encoding/base64"
+
+	"github.com/kirsle/blog/core/jsondb"
+)
+
+// DB is a reference to the parent app's JsonDB object.
+var DB *jsondb.DB
+
+// Settings holds the global app settings.
+type Settings struct {
+	// Only gets set to true on save(), this determines whether
+	// the site has ever been configured before.
+	Initialized bool `json:"initialized"`
+
+	Site struct {
+		Title      string `json:"title"`
+		AdminEmail string `json:"adminEmail"`
+	} `json:"site"`
+
+	// Security-related settings.
+	Security struct {
+		SecretKey string `json:"secretKey"` // Session cookie secret key
+		HashCost  int    `json:"hashCost"`  // Bcrypt hash cost for passwords
+	} `json:"security"`
+
+	// Redis settings for caching in JsonDB.
+	Redis struct {
+		Enabled bool   `json:"enabled"`
+		Host    string `json:"host"`
+		Port    int    `json:"port"`
+		DB      int    `json:"db"`
+		Prefix  string `json:"prefix"`
+	} `json:"redis"`
+
+	// Mail settings
+	Mail struct{} `json:"mail,omitempty"`
+}
+
+// Defaults returns default settings. The app initially sets this on
+// startup before reading your site's saved settings (if available).
+// Also this is used as a template when the user first configures their
+// site.
+func Defaults() *Settings {
+	s := &Settings{}
+	s.Site.Title = "Untitled Site"
+	s.Security.HashCost = 14
+	s.Security.SecretKey = RandomKey()
+	s.Redis.Host = "localhost"
+	s.Redis.Port = 6379
+	s.Redis.DB = 0
+	return s
+}
+
+// RandomKey generates a random string to use for the site's secret key.
+func RandomKey() string {
+	keyLength := 32
+
+	b := make([]byte, keyLength)
+	rand.Read(b)
+	return base64.URLEncoding.EncodeToString(b)
+}
+
+// Load the settings.
+func Load() (*Settings, error) {
+	s := &Settings{}
+	err := DB.Get("app/settings", &s)
+	return s, err
+}
+
+// Save the site settings.
+func (s *Settings) Save() error {
+	s.Initialized = true
+
+	err := DB.Commit("app/settings", &s)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}

core/models/users/users.go

@@ -122,7 +122,7 @@ func Load(id int) (*User, error) {
 func (u *User) Save() error {
 	// Sanity check that we have an ID.
 	if u.ID == 0 {
-		return errors.New("can't save: user does not have an ID!")
+		return errors.New("can't save a user with no ID")
 	}
 
 	// Save the main DB file.
@@ -175,7 +175,3 @@ func (u *User) key() string {
 func (u *User) nameKey() string {
 	return "users/by-name/" + u.Username
 }
-
-func (u *User) DocumentPath() string {
-	return "users/by-id/%s"
-}

core/templates.go

@@ -3,8 +3,10 @@ package core
 import (
 	"html/template"
 	"net/http"
+	"strings"
 
 	"github.com/kirsle/blog/core/forms"
+	"github.com/kirsle/blog/core/models/settings"
 	"github.com/kirsle/blog/core/models/users"
 )
 
@@ -13,7 +15,9 @@ import (
 // when the template is rendered.
 type Vars struct {
 	// Global template variables.
+	SetupNeeded bool
 	Title       string
+	Path        string
 	LoggedIn    bool
 	CurrentUser *users.User
 
@@ -26,7 +30,17 @@ type Vars struct {
 
 // LoadDefaults combines template variables with default, globally available vars.
 func (v *Vars) LoadDefaults(r *http.Request) {
-	v.Title = "Untitled Blog"
+	// Get the site settings.
+	s, err := settings.Load()
+	if err != nil {
+		s = settings.Defaults()
+	}
+
+	if s.Initialized == false && !strings.HasPrefix(r.URL.Path, "/admin/setup") {
+		v.SetupNeeded = true
+	}
+	v.Title = s.Site.Title
+	v.Path = r.URL.Path
 
 	ctx := r.Context()
 	if user, ok := ctx.Value(userKey).(*users.User); ok {

root/.layout.gohtml

@@ -49,11 +49,20 @@
 <div class="container mb-5">
     <div class="row">
         <div class="col-9">
+            {{ if .SetupNeeded }}
+            <div class="alert alert-success">
+                Your web blog needs to be set up!
+                Please <a href="/admin/setup">click here</a> to
+                configure your blog.
+            </div>
+            {{ end }}
+
             {{ if .Flash }}
             <div class="alert alert-success">
                 {{ .Flash }}
             </div>
             {{ end }}
+
             {{ if .Error }}
             <div class="alert alert-danger">
                 <strong>Error:</strong> {{ .Error }}