Improve code readability

docs/migration.sql

@@ -1,10 +1 @@
--- Create report table
-CREATE TABLE `comunic_reports` (
-  `id` INT NOT NULL AUTO_INCREMENT,
-  `user_id` INT NOT NULL,
-  `target_type` VARCHAR(25) NOT NULL,
-  `target_id` INT NOT NULL,
-  `time` INT NOT NULL,
-  `cause` VARCHAR(20) NOT NULL,
-  `comment` TEXT NULL,
-  PRIMARY KEY (`id`));
+-- Nothing yet

src/api_data/notification_api.rs

@@ -40,7 +40,7 @@ impl NotificationAPI {
         }
     }
 
-    pub fn for_list(l: &Vec<Notification>) -> Vec<NotificationAPI> {
+    pub fn for_list(l: &[Notification]) -> Vec<NotificationAPI> {
         l.iter().map(Self::new).collect()
     }
 }

src/api_data/posts_targets_api.rs

@@ -13,7 +13,7 @@ pub struct PostsTargets {
 }
 
 impl PostsTargets {
-    pub fn new(f: &Vec<UserID>, g: &Vec<GroupID>) -> PostsTargets {
+    pub fn new(f: &[UserID], g: &[GroupID]) -> PostsTargets {
         PostsTargets {
             friends: f.iter().map(|f| f.id()).collect(),
             groups: g.iter().map(|f| f.id()).collect(),

src/api_data/user_membership_api.rs

@@ -26,7 +26,7 @@ impl UserMembershipAPI {
                 membership_type: TypeContainerAPI::new("group".to_string()),
                 id: Some(group_id.id()),
                 friend: None,
-                last_activity: Some(last_activity.clone()),
+                last_activity: Some(*last_activity),
                 conv: None,
             },
 
@@ -48,7 +48,7 @@ impl UserMembershipAPI {
         }
     }
 
-    pub fn for_list(l: &Vec<UserMembership>) -> Vec<UserMembershipAPI> {
+    pub fn for_list(l: &[UserMembership]) -> Vec<UserMembershipAPI> {
         l.iter().map(Self::new).collect()
     }
 }