✨ Add user management

cmd_user.go

@@ -148,3 +148,26 @@ func (cmd CmdUserDelete) Run(app *app) error {
 	}
 	return nil
 }
+
+func (app *app) deleteUser(username string) error {
+	if err := app.userStore.RemoveUser(username); err != nil {
+		return fmt.Errorf("cannot remove user: %w", err)
+	}
+
+	sharesByUser, err := app.shareStore.FindSharesByUser(username)
+	if err != nil {
+		return fmt.Errorf("cannot get shares of user: %w", err)
+	}
+	allSuccessful := true
+	for _, userShare := range sharesByUser {
+		if err := app.shareStore.RemoveShare(userShare.UUID); err != nil {
+			fmt.Fprintf(os.Stderr, "User %q cannot be removed from Share %q: %v\n", username, userShare.UUID.String(), err)
+			allSuccessful = false
+		}
+	}
+	if !allSuccessful {
+		return fmt.Errorf("could not remove user from all shares")
+	}
+
+	return nil
+}

templates/base.html

@@ -15,6 +15,7 @@
             border: 0;
             background-color: #c4e1ff;
             font-weight: bold;
+            font-size: small;
         }
 
         input[type="submit"].delete {
@@ -64,6 +65,32 @@
             border: 1px solid gray;
         }
 
+        .dialog, .error {
+            left: 50%;
+            top: 50%;
+            position: absolute;
+            transform: translate(-50%, -50%);
+            border: solid lightgrey;
+            padding: 1em;
+            border-radius: .5em;
+        }
+
+        .dialog label {
+            display: flex;
+            margin-bottom: 1em;
+            align-items: center;
+        }
+
+        .form-content {
+            display: grid;
+            grid-gap : 20px;
+            grid-template-columns: 100px 1fr;
+        }
+        .form-controls {
+            margin-top: 1em;
+            text-align: right;
+        }
+
         body {
             font-family: sans-serif;
             margin-left: 200px

templates/create-user.html

@@ -0,0 +1,21 @@
+{{ define "page-content" }}
+    <form method="post" class="dialog">
+        <div class="form-content">
+            <label for="username">Username</label>
+            <input name="username" id="username" placeholder="Username"/>
+
+            <label for="role">Role</label>
+            <select name="role" id="role">
+                <option value="user" selected>User</option>
+                <option value="admin">Admin</option>
+            </select>
+
+            <label for="password">Password</label>
+            <input type="password" name="password" id="password" placeholder="Password"/>
+
+        </div>
+        <div class="form-controls">
+            <input type="submit" value="Create User"/>
+        </div>
+    </form>
+{{ end }}

templates/users.html

@@ -1,16 +1,34 @@
+{{ define "page-styles"}}
+    <style>
+        table {
+            border-spacing: .5em;
+        }
+    </style>
+{{ end }}
+
 {{ define "page-content" }}
     <table>
         <thead>
         <tr>
             <td>User</td>
             <td>Role</td>
+            <td>Action</td>
         </tr>
         </thead>
         <tbody>
-            {{ range $user := .Users }}<tr>
+        {{ range $user := .Users }}
+        <tr id="user-{{ $user.Username }}">
             <td>{{ $user.Username }}</td>
             <td>{{ $user.Role }}</td>
+            <td>
+                <form style="display: inline-block;" action="delete-user" method="post">
+                    <input type="hidden" name="user" value="{{ $user.Username }}"/>
+                    <input type="submit" value="Delete" class="delete"/>
+                </form>
+            </td>
         </tr>{{ end }}
         </tbody>
     </table>
+
+    <a href="create-user" class="create-user">Create User</a>
 {{ end }}

webadmin.go

@@ -54,6 +54,7 @@ type webAdminHandler struct {
 	tplShareAddUser  *template.Template
 	tplShareAddLogin *template.Template
 	tplCreateShare   *template.Template
+	tplCreateUser    *template.Template
 }
 
 type sessionContext struct {
@@ -107,6 +108,7 @@ func newWebAdminHandler(app *app) *webAdminHandler {
 		tplShareAddUser:  loadTemplate("share-add-user"),
 		tplShareAddLogin: loadTemplate("share-add-login"),
 		tplCreateShare:   loadTemplate("create-share"),
+		tplCreateUser:    loadTemplate("create-user"),
 	}
 
 	r := chi.NewRouter()
@@ -519,6 +521,85 @@ Are you sure you want to continue?`, share.UUID, share.Name)
 		}
 		sessionContext.Redirect("shares")
 	})
+	ar.Route("/create-user", func(r chi.Router) {
+		r.Get("/", func(w http.ResponseWriter, r *http.Request) {
+			sessionContext := h.buildSessionContext(w, r)
+
+			if sessionContext.user.Role != GlobalRoleAdmin {
+				sessionContext.Unauthorized()
+				return
+			}
+
+			sessionContext.RenderPage(h.tplCreateUser, nil)
+		})
+		r.Post("/", func(w http.ResponseWriter, r *http.Request) {
+			sessionContext := h.buildSessionContext(w, r)
+
+			if sessionContext.user.Role != GlobalRoleAdmin {
+				sessionContext.Unauthorized()
+				return
+			}
+
+			returnURL := "users"
+
+			pwHash, err := bcrypt.GenerateFromPassword([]byte(r.FormValue("password")), bcrypt.DefaultCost)
+			if err != nil {
+				sessionContext.RenderError(template.HTML("Internal error: "+err.Error()), returnURL)
+				return
+			}
+
+			user := User{
+				Username: r.FormValue("username"),
+				Password: string(pwHash),
+				Role:     GlobalRole(r.FormValue("role")),
+			}
+
+			switch user.Role {
+			case GlobalRoleUser:
+			case GlobalRoleAdmin:
+			default:
+				sessionContext.RenderError(template.HTML("Invalid role."), "")
+				return
+			}
+
+			err = app.userStore.AddUser(user)
+			if err != nil {
+				sessionContext.RenderError(template.HTML("Cannot create user: "+err.Error()), "")
+				return
+			}
+
+			sessionContext.Redirect("users#user-" + user.Username)
+		})
+	})
+	ar.Post("/delete-user", func(w http.ResponseWriter, r *http.Request) {
+		sessionContext := h.buildSessionContext(w, r)
+
+		if sessionContext.user.Role != GlobalRoleAdmin {
+			sessionContext.Unauthorized()
+			return
+		}
+
+		user, err := app.userStore.GetUser(r.FormValue("user"))
+		if err != nil {
+			sessionContext.RenderError(template.HTML("Cannot delete user: "+err.Error()), "users")
+			return
+		}
+
+		message := fmt.Sprintf(`You are about to delete the user %s (<i>%s</i>).<br/>
+This will delete all share associations and logins.<br/><br/>
+Are you sure you want to continue?`, user.Username, user.Role)
+		if confirmStatus := sessionContext.RequestConfirmation(template.HTML(message), "delete-user"); confirmStatus == confirmRequested {
+			// We have already rendered. Nothing to do.
+			return
+		} else if confirmStatus == confirmAccepted {
+			cmd := CmdUserDelete{Username: user.Username}
+			if err := cmd.Run(app); err != nil {
+				sessionContext.RenderError(template.HTML("Cannot delete user: "+err.Error()), "users")
+				return
+			}
+		}
+		sessionContext.Redirect("users")
+	})
 	h.router = r
 
 	return h