fix: Improved importing of duplicate posts and comments

lib/bdfr_browser/comment.ex

@@ -43,6 +43,15 @@ defmodule BdfrBrowser.Comment do
     )
   end
 
+  def get_import(id) do
+    from(c in __MODULE__,
+      select: %{
+        id: c.id
+      },
+      where: c.id == ^id
+    )
+  end
+
   def search(str), do: search(str, nil)
 
   def search(str, subreddits) when is_nil(subreddits) do

lib/bdfr_browser/importer.ex

@@ -310,7 +310,9 @@ defmodule BdfrBrowser.Importer do
 
   defp import_post(post, subreddit) when not is_nil(subreddit) do
     id = post["id"]
+    db_post = id |> Post.get_import() |> Repo.one()
 
+    if is_nil(db_post) do
       %Post{
         id: id,
         title: post["title"],
@@ -323,16 +325,18 @@ defmodule BdfrBrowser.Importer do
         filename: Path.basename(post["filename"], ".json"),
         subreddit: subreddit
       }
-    |> Repo.insert(
+      |> Repo.insert()
-      on_conflict: [set: [id: id]],
+    else
-      conflict_target: :id
+      {:ok, db_post}
-    )
+    end
   end
 
   defp import_comment(comment, post, parent) when not is_nil(post) do
     id = comment["id"]
+    db_comment = id |> Comment.get_import() |> Repo.one()
 
     {:ok, parent} =
+      if is_nil(db_comment) do
         %Comment{
           id: id,
           author: comment["author"],
@@ -342,10 +346,10 @@ defmodule BdfrBrowser.Importer do
           post: post,
           parent: parent
         }
-      |> Repo.insert(
+        |> Repo.insert()
-        on_conflict: [set: [id: id]],
+      else
-        conflict_target: :id
+        {:ok, db_comment}
-      )
+      end
 
     children = for child <- comment["replies"], do: import_comment(child, post, parent)
 
@@ -370,8 +374,10 @@ defmodule BdfrBrowser.Importer do
     id = calculate_message_id(message, chat.id)
     message_content = message["content"]["Message"]
     {:ok, posted_at, 0} = DateTime.from_iso8601(message["timestamp"])
+    db_message = Repo.get(Message, id)
 
     {:ok, message_record} =
+      if is_nil(db_message) do
         %Message{
           id: id,
           author: message["author"],
@@ -379,10 +385,10 @@ defmodule BdfrBrowser.Importer do
           posted_at: posted_at,
           chat: chat
         }
-      |> Repo.insert(
+        |> Repo.insert()
-        on_conflict: [set: [id: id]],
+      else
-        conflict_target: :id
+        {:ok, db_message}
-      )
+      end
 
     existing_image =
       message_record.message == "Image" or

lib/bdfr_browser/post.ex

@@ -98,6 +98,15 @@ defmodule BdfrBrowser.Post do
     having(query, [p, c, s], count(c.id) > ^more_than)
   end
 
+  def get_import(id) do
+    from(p in __MODULE__,
+      select: %{
+        id: p.id
+      },
+      where: p.id == ^id
+    )
+  end
+
   def get_full(id) do
     from(p in __MODULE__,
       where: p.id == ^id,