feat: add linkedin account to profiles

backend/migrations/007_add_linkedin_account.sql

@@ -0,0 +1,2 @@
+ALTER TABLE profiles ADD COLUMN IF NOT EXISTS linkedin_account TEXT;
+CREATE UNIQUE INDEX IF NOT EXISTS unique_linkedin_account_lower ON profiles (LOWER(linkedin_account));

backend/src/application/commands/create_profile.rs

@@ -2,6 +2,7 @@ use crate::application::dtos::profile_dtos::{CreateProfileRequest, ProfileRespon
 use crate::domain::entities::profile::Profile;
 use crate::domain::repositories::profile_repository::ProfileRepository;
 use crate::domain::value_objects::wallet_address::WalletAddress;
+use regex;
 use std::sync::Arc;
 
 pub async fn create_profile(
@@ -24,6 +25,31 @@ pub async fn create_profile(
     let mut profile = Profile::new(wallet_address.clone());
     profile.update_info(Some(request.name), request.description, request.avatar_url);
 
+    if let Some(ref account) = request.linkedin_account {
+        let trimmed = account.trim();
+
+        if trimmed.is_empty() {
+            profile.linkedin_account = None;
+        } else {
+            let valid_format = regex::Regex::new(r"^[a-zA-Z0-9-]{3,100}$").unwrap();
+            if !valid_format.is_match(trimmed) {
+                return Err("Invalid LinkedIn account format".to_string());
+            }
+
+            let normalized = trimmed.to_lowercase();
+            if profile_repository
+                .find_by_linkedin_account(normalized.as_str())
+                .await
+                .map_err(|e| e.to_string())?
+                .is_some()
+            {
+                return Err("LinkedIn account already taken".to_string());
+            }
+
+            profile.linkedin_account = Some(trimmed.to_string());
+        }
+    }
+
     profile_repository
         .create(&profile)
         .await
@@ -36,6 +62,7 @@ pub async fn create_profile(
         avatar_url: profile.avatar_url,
         github_login: profile.github_login,
         twitter_handle: profile.twitter_handle,
+        linkedin_account: profile.linkedin_account,
         created_at: profile.created_at,
         updated_at: profile.updated_at,
     })

backend/src/application/commands/update_profile.rs

@@ -68,6 +68,33 @@ pub async fn update_profile(
             profile.twitter_handle = Some(trimmed.to_string());
         }
     }
+    if let Some(ref account) = request.linkedin_account {
+        let trimmed = account.trim();
+
+        // Allow empty accounts (set to None)
+        if trimmed.is_empty() {
+            profile.linkedin_account = None;
+        } else {
+            // Validate format for non-empty LinkedIn accounts
+            let valid_format = regex::Regex::new(r"^[a-zA-Z0-9-]{3,100}$").unwrap();
+            if !valid_format.is_match(trimmed) {
+                return Err("Invalid LinkedIn account format".to_string());
+            }
+
+            let normalized = trimmed.to_lowercase();
+            if let Some(conflicting_profile) = profile_repository
+                .find_by_linkedin_account(normalized.as_str())
+                .await
+                .map_err(|e| e.to_string())?
+            {
+                if conflicting_profile.address != wallet_address {
+                    return Err("LinkedIn account already taken".to_string());
+                }
+            }
+
+            profile.linkedin_account = Some(trimmed.to_string());
+        }
+    }
     profile_repository
         .update(&profile)
         .await
@@ -80,6 +107,7 @@ pub async fn update_profile(
         avatar_url: profile.avatar_url,
         github_login: profile.github_login,
         twitter_handle: profile.twitter_handle,
+        linkedin_account: profile.linkedin_account,
         created_at: profile.created_at,
         updated_at: profile.updated_at,
     })

backend/src/application/dtos/profile_dtos.rs

@@ -7,6 +7,7 @@ pub struct CreateProfileRequest {
     pub name: String,
     pub description: Option<String>,
     pub avatar_url: Option<String>,
+    pub linkedin_account: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -16,6 +17,7 @@ pub struct UpdateProfileRequest {
     pub avatar_url: Option<String>,
     pub github_login: Option<String>,
     pub twitter_handle: Option<String>,
+    pub linkedin_account: Option<String>,
 }
 
 #[derive(Debug, Clone, Serialize, Deserialize)]
@@ -26,6 +28,7 @@ pub struct ProfileResponse {
     pub avatar_url: Option<String>,
     pub github_login: Option<String>,
     pub twitter_handle: Option<String>,
+    pub linkedin_account: Option<String>,
     pub created_at: chrono::DateTime<chrono::Utc>,
     pub updated_at: chrono::DateTime<chrono::Utc>,
 }

backend/src/application/queries/get_all_profiles.rs

@@ -19,6 +19,7 @@ pub async fn get_all_profiles(
             avatar_url: profile.avatar_url,
             github_login: profile.github_login,
             twitter_handle: profile.twitter_handle,
+            linkedin_account: profile.linkedin_account,
             created_at: profile.created_at,
             updated_at: profile.updated_at,
         })

backend/src/application/queries/get_profile.rs

@@ -22,6 +22,7 @@ pub async fn get_profile(
         avatar_url: profile.avatar_url,
         github_login: profile.github_login,
         twitter_handle: profile.twitter_handle,
+        linkedin_account: profile.linkedin_account,
         created_at: profile.created_at,
         updated_at: profile.updated_at,
     })