bug: fixed inserting slides in the middle of songs

Since songs had more than one slide, anything inserted after the first
multi-slide item would break the insertion. ServiceItem indexes are
not the same as the slide indexes so we needed to find the right
index, then properly change the other indexes in the right spot.

I think I've done this by using rust iterators better.

src/cpp/serviceitemmodel.cpp

@@ -239,7 +239,7 @@ void ServiceItemModel::addItem(const QString &name, const QString &type,
   qDebug() << "*&";
   qDebug() << itm;
   qDebug() << "*&";
-  emit itemAdded(rowCount() - 1, *item);
+  // emit itemAdded(rowCount() - 1, *item);
   emit itemAddedRust(rowCount() - 1, itm);
   qDebug() << "EMITTED ITEM ADDED" << rowCount();
   qDebug() << "#################################";
@@ -278,7 +278,7 @@ void ServiceItemModel::insertItem(const int &index, const QString &name,
   } else
     qDebug() << "idx isn't valid";
 
-  emit itemInserted(index, *item);
+  // emit itemInserted(index, *item);
   emit itemInsertedRust(index, itm);
 
   qDebug() << "EMITTED ITEM INSERTED";

src/rust/slide_model.rs

@@ -346,29 +346,40 @@ mod slide_model {
                 .unwrap_or(false);
             slide.video_thumbnail = QString::from("");
 
-            // We need to move all the current slides service_item_id's up by one.
+            let slides_iter = self.as_mut().slides_mut().iter_mut();
-            let slides_len = self.as_mut().slides_mut().len() as i32;
+            let mut slide_index = 0;
-            for slide in index..slides_len {
+            for (i, slide) in slides_iter.enumerate().rev() {
-                if let Some(slide) = self.as_mut().slides_mut().get_mut(slide as usize) {
+                if slide.service_item_id == index {
-                    slide.service_item_id += 1;
+                    slide_index = i as i32;
+                    break;
                 }
             }
 
+            // We need to move all the current slides service_item_id's up by one.
+            let slides_iter = self.as_mut().slides_mut().iter_mut();
+            for slide in slides_iter.filter(|x| x.service_item_id >= index) {
+                slide.service_item_id += 1;
+            }
+
             match ty {
                 Some(ty) if ty == QString::from("image") => {
                     slide.ty = ty;
                     slide.image_background = background;
                     slide.video_background = QString::from("");
                     slide.slide_index = 0;
-                    self.as_mut().insert_slide(&slide, index);
+                    self.as_mut().insert_slide(&slide, slide_index);
                 }
                 Some(ty) if ty == QString::from("song") => {
-                    for i in 0..text_vec.len() {
+                    let count = text_vec.len();
-                        println!("add song of {:?} length", text_vec.len());
+                    for (i, text) in text_vec.iter().enumerate() {
+                        println!(
+                            "rust: add song of {:?} length at index {:?}",
+                            &count, &slide_index
+                        );
                         slide.ty = ty.clone();
                         // println!("{:?}", text_vec[i].clone());
-                        slide.text = text_vec[i].clone();
+                        slide.text = text.clone();
-                        slide.slide_count = text_vec.len() as i32;
+                        slide.slide_count = count as i32;
                         slide.slide_index = i as i32;
                         if background_type == QString::from("image") {
                             slide.image_background = background.clone();
@@ -377,7 +388,7 @@ mod slide_model {
                             slide.video_background = background.clone();
                             slide.image_background = QString::from("");
                         }
-                        self.as_mut().insert_slide(&slide, index + i as i32);
+                        self.as_mut().insert_slide(&slide, slide_index + i as i32);
                     }
                 }
                 Some(ty) if ty == QString::from("video") => {
@@ -385,7 +396,7 @@ mod slide_model {
                     slide.image_background = QString::from("");
                     slide.video_background = background;
                     slide.slide_index = 0;
-                    self.as_mut().insert_slide(&slide, index);
+                    self.as_mut().insert_slide(&slide, slide_index);
                 }
                 Some(ty) if ty == QString::from("presentation") => {
                     for i in 0..slide.slide_count {
@@ -393,7 +404,7 @@ mod slide_model {
                         slide.image_background = background.clone();
                         slide.video_background = QString::from("");
                         slide.slide_index = i;
-                        self.as_mut().insert_slide(&slide, index + i as i32);
+                        self.as_mut().insert_slide(&slide, slide_index + i as i32);
                     }
                 }
                 _ => println!("It's somethign else!"),