replace == "" with .blank?

src/endpoints/levels/addLevelComment.cr

@@ -19,7 +19,7 @@ CrystalGauntlet.endpoints["/uploadGJComment21.php"] = ->(context : HTTP::Server:
     return "-1"
   end
 
-  if comment && comment != ""
+  if comment && !comment.blank?
     # todo: cap comment size
     comment_value = Base64.decode_string comment # usual b64, surprisingly
     next_id = IDs.get_next_id("comments")

src/endpoints/levels/getLevels.cr

@@ -23,7 +23,7 @@ CrystalGauntlet.endpoints["/getGJLevels21.php"] = ->(context : HTTP::Server::Con
 
   searchQuery = params["str"]? || ""
 
-  if searchQuery != "" && params["type"] != "5" && params["type"] != "10" && params["type"] != "19"
+  if !searchQuery.blank? && params["type"] != "5" && params["type"] != "10" && params["type"] != "19"
     if searchQuery.to_i?
       # we do this to get rid of the initial "unlisted = 0" bit
       can_see_unlisted = true
@@ -59,7 +59,7 @@ CrystalGauntlet.endpoints["/getGJLevels21.php"] = ->(context : HTTP::Server::Con
 	  # $params[] = "levelID IN ($completedLevels)";
   end
   if params["song"]?
-    if params["customSong"]? && params["customSong"]? != ""
+    if params["customSong"]? && !params["customSong"].blank?
       queryParams << "song_id = '#{params["customSong"].to_i}'"
     else
       queryParams << "song_id = '#{params["song"].to_i}'"

src/endpoints/users/addProfileComment.cr

@@ -13,7 +13,7 @@ CrystalGauntlet.endpoints["/uploadGJAccComment20.php"] = ->(context : HTTP::Serv
 
   comment = params["comment"]?
 
-  if comment && comment != ""
+  if comment && !comment.blank?
     # todo: cap comment size
     comment_value = Base64.decode_string comment # usual b64, surprisingly
     next_id = IDs.get_next_id("account_comments")

src/lib/accounts.cr

@@ -17,7 +17,7 @@ module CrystalGauntlet::Accounts
 
   # DOESN'T VERIFY PASSWORD
   def get_ext_id_from_params(params : URI::Params) : Int32 | Nil
-    if params.has_key?("udid") && params["udid"] != ""
+    if params.has_key?("udid") && !params["udid"].blank?
       params["udid"].to_i32?
     else
       get_account_id_from_params(params)
@@ -63,7 +63,7 @@ module CrystalGauntlet::Accounts
   end
 
   def verify_gjp(account_id : Int32, gjp : String) : Bool
-    if gjp == ""
+    if gjp.blank?
       return false
     end
     hash = DATABASE.scalar("select password from accounts where id = ?", account_id).as(String)

src/lib/songs.cr

@@ -95,7 +95,7 @@ module CrystalGauntlet::Songs
     if source == "unknown"
       return UNKNOWN_SONG_AUTHOR
     end
-    if artist_name == ""
+    if artist_name.blank?
       return UNKNOWN_SONG_AUTHOR
     end