getting the ids

src/sqlite_merger.gleam

@@ -1,26 +1,29 @@
 import gleam/dynamic
-import gleam/int
 import gleam/io
 import gleam/list
-import gleam/string
+import gleam/set.{type Set}
 import sqlight
 
-pub fn main() {
-  io.println("Hello from sqlite_merger!")
-
-  use conn <- sqlight.with_connection("file:bookmarks.db")
-  let query = "SELECT id, url FROM bookmarks;"
-  let decoder = dynamic.tuple2(dynamic.int, dynamic.string)
-  let message = case
+fn list_items(db: String) -> Set(Int) {
+  use conn <- sqlight.with_connection("file:" <> db)
+  let query = "SELECT id, id FROM bookmarks;"
+  let decoder = dynamic.element(0, dynamic.int)
+  let assert Ok(ids) =
     sqlight.query(query, on: conn, with: [], expecting: decoder)
-  {
-    Error(e) -> e.message
-    Ok(res) ->
-      res
-      |> list.map(fn(x) { x.0 })
-      |> list.map(fn(x) { int.to_string(x) })
-      |> list.map(fn(x) { x <> " " })
-      |> string.concat
-  }
-  io.println(message)
+
+  ids
+  |> list.map(fn(x) { x })
+  |> set.from_list
+}
+
+fn diff_items(db1: String, db2: String) -> Set(Int) {
+  let items1 = list_items(db1)
+  let items2 = list_items(db2)
+
+  set.difference(items1, items2)
+}
+
+pub fn main() {
+  let ids = list_items("bookmarks.db")
+  io.println("Hey")
 }