Refactor ItemName::new to take strings directly

This loosens the dependency on always querying full Items and
ItemClasses.

src/frontend/item.rs

@@ -66,7 +66,7 @@ async fn show(
 
     let item_class = item_classes.get(&item.class).unwrap();
 
-    let item_name = ItemName::new(&item, item_class);
+    let item_name = ItemName::new(item.name.as_ref(), &item_class.name);
     let mut title = item_name.to_string();
     title.push_str(" – Item Details");
 
@@ -133,7 +133,7 @@ async fn show(
                         @if let Some(original_packaging) = original_packaging {
                             a
                                 href={ "/item/" (original_packaging.id) }
-                                { (ItemName::new(&original_packaging, &item_classes.get(&original_packaging.class).unwrap())) }
+                                { (ItemName::new(original_packaging.name.as_ref(), &item_classes.get(&original_packaging.class).unwrap().name)) }
                         } @else {
                             "-"
                         }
@@ -160,7 +160,7 @@ async fn show(
                 ul {
                     @for child in children {
                         li {
-                            a href={ "/item/" (child.id) } { (ItemName::new(&child, &item_classes.get(&child.class).unwrap())) }
+                            a href={ "/item/" (child.id) } { (ItemName::new(child.name.as_ref(), &item_classes.get(&child.class).unwrap().name)) }
                         }
                     }
                 }
@@ -172,7 +172,7 @@ async fn show(
                 ul {
                     @for item in original_packaging_of {
                         li {
-                            a href={ "/item/" (item.id) } { (ItemName::new(&item, &item_classes.get(&item.class).unwrap())) }
+                            a href={ "/item/" (item.id) } { (ItemName::new(item.name.as_ref(), &item_classes.get(&item.class).unwrap().name)) }
                         }
                     }
                 }
@@ -246,7 +246,7 @@ async fn list(pool: web::Data<PgPool>, user: Identity) -> actix_web::Result<impl
                         tr {
                             td {
                                 a href={ "/item/" (item.id) } {
-                                    (ItemName::new(&item, class).terse())
+                                    (ItemName::new(item.name.as_ref(), &class.name).terse())
                                 }
                             }
                             td { a href={ "/item-class/" (class.id) } { (class.name) } }
@@ -443,7 +443,7 @@ async fn edit_form(
         .await
         .map_err(error::ErrorInternalServerError)?;
 
-    let item_name = ItemName::new(&item, &item_class);
+    let item_name = ItemName::new(item.name.as_ref(), &item_class.name);
     let mut title = item_name.to_string();
     title.push_str(" – Edit Item");
 

src/frontend/item_class.rs

@@ -153,7 +153,7 @@ async fn show(
                 ul {
                     @for item in items {
                         li {
-                            a href={ "/item/" (item.id) } { (ItemName::new(&item, &item_class).terse()) }
+                            a href={ "/item/" (item.id) } { (ItemName::new(item.name.as_ref(), &item_class.name).terse()) }
                         }
                     }
                 }

src/frontend/labels.rs

@@ -120,7 +120,7 @@ async fn form(pool: web::Data<PgPool>, user: Identity) -> actix_web::Result<impl
                             label .form-label for="ids-multiselect" { "Items" }
                             select #ids-multiselect .form-select multiple size="15" {
                                 @for item in items {
-                                    @let item_name = ItemName::new(&item, item_classes.get(&item.class).unwrap());
+                                    @let item_name = ItemName::new(item.name.as_ref(), &item_classes.get(&item.class).unwrap().name);
                                     option value={ (item.id) } { (item_name.to_string()) " (" (item.id) ")" }
                                 }
                             }

src/frontend/templates/datalist.rs

@@ -55,7 +55,10 @@ pub async fn items(pool: &PgPool) -> Result<Datalist, sqlx::Error> {
             .iter()
             .map(|i| DatalistOption {
                 value: i.id.to_string(),
-                text: Box::new(ItemName::new(i, item_classes.get(&i.class).unwrap())),
+                text: Box::new(ItemName::new(
+                    i.name.as_ref(),
+                    &item_classes.get(&i.class).unwrap().name,
+                )),
             })
             .collect(),
     })

src/frontend/templates/helpers.rs

@@ -93,11 +93,11 @@ pub enum ItemName {
 }
 
 impl ItemName {
-    pub fn new(item: &Item, class: &ItemClass) -> Self {
+    pub fn new(item_name: Option<&String>, class_name: &String) -> Self {
-        if let Some(ref name) = item.name {
+        if let Some(ref name) = item_name {
             Self::Item(name.to_string())
         } else {
-            Self::Class(class.name.clone())
+            Self::Class(class_name.to_string())
         }
     }
 }
@@ -236,10 +236,10 @@ pub fn parents_breadcrumb(
             };
             @for parent in parents {
                 li .breadcrumb-item {
-                    a href={ "/item/" (parent.id) } { (ItemName::new(parent, parents_item_classes.get(&parent.class).unwrap()) )}
+                    a href={ "/item/" (parent.id) } { (ItemName::new(parent.name.as_ref(), &parents_item_classes.get(&parent.class).unwrap().name)) }
                 }
             }
-            li .breadcrumb-item.active { (ItemName::new(item, item_class)) }
+            li .breadcrumb-item.active { (ItemName::new(item.name.as_ref(), &item_class.name)) }
         }
     }
 }