add page num counting to ItemsIter

src/entities/itemsiter.rs

@@ -7,6 +7,7 @@ pub struct ItemsIter<'a, T: Clone + for<'de> Deserialize<'de>> {
     page: Page<'a, T>,
     buffer: Vec<T>,
     cur_idx: usize,
+    cur_page: usize,
     use_initial: bool,
 }
 
@@ -16,6 +17,7 @@ impl<'a, T: Clone + for<'de> Deserialize<'de>> ItemsIter<'a, T> {
             page,
             buffer: vec![],
             cur_idx: 0,
+            cur_page: 0,
             use_initial: true,
         }
     }
@@ -36,12 +38,17 @@ impl<'a, T: Clone + for<'de> Deserialize<'de>> ItemsIter<'a, T> {
             }
             self.buffer = items;
             self.cur_idx = 0;
+            self.cur_page += 1;
             Some(())
         } else {
             None
         }
     }
 
+    pub fn page_num(&self) -> usize {
+        self.cur_page
+    }
+
     pub async fn next_item(&mut self) -> Option<T> {
         if self.use_initial {
             if self.page.initial_items.is_empty() || self.cur_idx == self.page.initial_items.len() {