update: all in one user avatar

app/src/assets/ui.less

@@ -268,3 +268,17 @@ input[type="number"] {
     }
   }
 }
+
+.avatar {
+  display: flex;
+  width: 2.5rem;
+  height: 2.5rem;
+  border-radius: var(--radius);
+  text-align: center;
+
+  p {
+    margin: auto;
+    color: hsl(var(--text));
+    transform: translateY(-1px);
+  }
+}

app/src/components/Avatar.tsx

@@ -0,0 +1,37 @@
+import { deeptrainApiEndpoint, useDeeptrain } from "@/utils/env.ts";
+import { ImgHTMLAttributes, useMemo } from "react";
+
+export interface AvatarProps extends ImgHTMLAttributes<HTMLElement> {
+  username: string;
+}
+
+function Avatar({ username, ...props }: AvatarProps) {
+  const code = useMemo(
+    () => (username.length > 0 ? username[0].toUpperCase() : "A"),
+    [username],
+  );
+
+  const color = useMemo(() => {
+    const colors = [
+      "bg-red-500",
+      "bg-yellow-500",
+      "bg-green-500",
+      "bg-blue-500",
+      "bg-indigo-500",
+      "bg-purple-500",
+      "bg-pink-500",
+    ];
+    const index = code.charCodeAt(0) % colors.length;
+    return colors[index];
+  }, [username]);
+
+  return useDeeptrain ? (
+    <img {...props} src={`${deeptrainApiEndpoint}/avatar/${username}`} alt="" />
+  ) : (
+    <div {...props} className={`avatar ${color}`}>
+      <p>{code}</p>
+    </div>
+  );
+}
+
+export default Avatar;

app/src/components/app/NavBar.tsx

@@ -16,8 +16,8 @@ import ModeToggle from "@/components/ThemeProvider.tsx";
 import router from "@/router.tsx";
 import MenuBar from "./MenuBar.tsx";
 import { getMemory } from "@/utils/memory.ts";
-import { deeptrainApiEndpoint } from "@/utils/env.ts";
 import { goAuth } from "@/utils/app.ts";
+import Avatar from "@/components/Avatar.tsx";
 
 function NavMenu() {
   const username = useSelector(selectUsername);
@@ -26,7 +26,7 @@ function NavMenu() {
     <div className={`avatar`}>
       <MenuBar>
         <Button variant={`ghost`} size={`icon`}>
-          <img src={`${deeptrainApiEndpoint}/avatar/${username}`} alt="" />
+          <Avatar username={username} />
         </Button>
       </MenuBar>
     </div>

app/src/components/home/SideBar.tsx

@@ -41,8 +41,8 @@ import { getSharedLink, shareConversation } from "@/api/sharing.ts";
 import { Input } from "@/components/ui/input.tsx";
 import MenuBar from "@/components/app/MenuBar.tsx";
 import { Separator } from "@/components/ui/separator.tsx";
-import { deeptrainApiEndpoint } from "@/utils/env.ts";
 import { goAuth } from "@/utils/app.ts";
+import Avatar from "@/components/Avatar.tsx";
 
 type Operation = {
   target: ConversationInstance | null;
@@ -325,7 +325,7 @@ function SidebarMenu() {
       <Separator orientation={`horizontal`} className={`mb-2`} />
       <MenuBar className={`menu-bar`}>
         <Button variant={`ghost`} className={`sidebar-wrapper`}>
-          <img src={`${deeptrainApiEndpoint}/avatar/${username}`} alt="" />
+          <Avatar username={username} />
           <span className={`username`}>{username}</span>
           <MoreHorizontal className={`h-4 w-4`} />
         </Button>

app/src/routes/Sharing.tsx

@@ -12,7 +12,7 @@ import router from "@/router.tsx";
 import { useToast } from "@/components/ui/use-toast.ts";
 import { sharingEvent } from "@/events/sharing.ts";
 import { Message } from "@/api/types.ts";
-import { deeptrainApiEndpoint } from "@/utils/env.ts";
+import Avatar from "@/components/Avatar.tsx";
 
 type SharingFormProps = {
   refer?: string;
@@ -33,7 +33,7 @@ function SharingForm({ refer, data }: SharingFormProps) {
     <div className={`sharing-container`}>
       <div className={`header`}>
         <div className={`user`}>
-          <img src={`${deeptrainApiEndpoint}/avatar/${data.username}`} alt="" />
+          <Avatar username={data.username} />
           <span>{data.username}</span>
         </div>
         <div className={`name`}>{data.name}</div>

auth/auth.go

@@ -119,11 +119,11 @@ func SignUp(c *gin.Context, form RegisterForm) (string, error) {
 		return "", errors.New("invalid username/password/email format")
 	}
 
-	if !IsUserExist(db, username) {
+	if IsUserExist(db, username) {
 		return "", fmt.Errorf("username is already taken, please try another one username (your current username: %s)", username)
 	}
 
-	if !IsEmailExist(db, email) {
+	if IsEmailExist(db, email) {
 		return "", fmt.Errorf("email is already taken, please try another one email (your current email: %s)", email)
 	}
 
@@ -170,7 +170,7 @@ func Login(c *gin.Context, form LoginForm) (string, error) {
 	if err := db.QueryRow(`
 			SELECT auth.id, auth.username, auth.password FROM auth 
 			WHERE (auth.username = ? OR auth.email = ?) AND auth.password = ?
-			`, username, hash).Scan(&user.ID, &user.Username, &user.Password); err != nil {
+			`, username, username, hash).Scan(&user.ID, &user.Username, &user.Password); err != nil {
 		return "", errors.New("invalid username or password")
 	}