Move DB queries related to 'users' in a separate module (1/2)

src/invidious/routes/api/v1/authenticated.cr

@@ -94,7 +94,7 @@ module Invidious::Routes::API::V1::Authenticated
 
     if !user.subscriptions.includes? ucid
       get_channel(ucid, PG_DB, false, false)
-      PG_DB.exec("UPDATE users SET feed_needs_update = true, subscriptions = array_append(subscriptions,$1) WHERE email = $2", ucid, user.email)
+      Invidious::Database::Users.subscribe_channel(user, ucid)
     end
 
     # For Google accounts, access tokens don't have enough information to
@@ -110,7 +110,7 @@ module Invidious::Routes::API::V1::Authenticated
 
     ucid = env.params.url["ucid"]
 
-    PG_DB.exec("UPDATE users SET feed_needs_update = true, subscriptions = array_remove(subscriptions, $1) WHERE email = $2", ucid, user.email)
+    Invidious::Database::Users.unsubscribe_channel(user, ucid)
 
     env.response.status_code = 204
   end

src/invidious/routes/feeds.cr

@@ -220,7 +220,7 @@ module Invidious::Routes::Feeds
       haltf env, status_code: 403
     end
 
-    user = PG_DB.query_one?("SELECT * FROM users WHERE token = $1", token.strip, as: User)
+    user = Invidious::Database::Users.select(token: token.strip)
     if !user
       haltf env, status_code: 403
     end

src/invidious/routes/login.cr

@@ -327,7 +327,7 @@ module Invidious::Routes::Login
         return error_template(401, "Password is a required field")
       end
 
-      user = PG_DB.query_one?("SELECT * FROM users WHERE email = $1", email, as: User)
+      user = Invidious::Database::Users.select(email: email)
 
       if user
         if !user.password
@@ -449,12 +449,7 @@ module Invidious::Routes::Login
           end
         end
 
-        user_array = user.to_a
-        user_array[4] = user_array[4].to_json # User preferences
-
-        args = arg_array(user_array)
-
-        PG_DB.exec("INSERT INTO users VALUES (#{args})", args: user_array)
+        Invidious::Database::Users.insert(user)
         Invidious::Database::SessionIDs.insert(sid, email)
 
         view_name = "subscriptions_#{sha256(user.email)}"

src/invidious/routes/watch.cr

@@ -76,7 +76,7 @@ module Invidious::Routes::Watch
     env.params.query.delete_all("iv_load_policy")
 
     if watched && !watched.includes? id
-      PG_DB.exec("UPDATE users SET watched = array_append(watched, $1) WHERE email = $2", id, user.as(User).email)
+      Invidious::Database::Users.mark_watched(user.as(User), id)
     end
 
     if notifications && notifications.includes? id