viewer: tag categories implementation

fixed single tags not appearing in the "Other filters" special category, following code review

GitHub: Resolves #29

2 files changed, 14 insertions, 6 deletions

diff --git a/viewer/src/@types/tag.d.ts b/viewer/src/@types/tag.d.ts
index 425a995..229c418 100644
--- a/viewer/src/@types/tag.d.ts
+++ b/viewer/src/@types/tag.d.ts
@@ -21,6 +21,7 @@ declare namespace Tag {
     interface Node {
         tag: Gallery.RawTag;
         tagfiltered: Gallery.RawTag;
+        rootPart: boolean;
         items: Gallery.Item[];
         children: Index;
     }
diff --git a/viewer/src/services/indexfactory.ts b/viewer/src/services/indexfactory.ts
index 466b509..0a84951 100644
--- a/viewer/src/services/indexfactory.ts
+++ b/viewer/src/services/indexfactory.ts
@@ -38,18 +38,19 @@ export default class IndexFactory {
       const parts = tag.split(':');
       let lastPart: string | null = null;
       for (const part of parts) {
-        tagsIndex[part] = IndexFactory.pushPartToIndex(tagsIndex[part], part, item);
+        tagsIndex[part] = IndexFactory.pushPartToIndex(tagsIndex[part], part, item, !Boolean(lastPart));
         if (lastPart) {
           const children = tagsIndex[lastPart].children;
-          children[part] = IndexFactory.pushPartToIndex(children[part], part, item);
+          children[part] = IndexFactory.pushPartToIndex(children[part], part, item, false);
         }
         lastPart = part;
       }
     }
   }
 
-  private static pushPartToIndex(index: Tag.Node, part: string, item: Gallery.Item): Tag.Node {
-    if (!index) index = { tag: part, tagfiltered: Navigation.normalize(part), items: [], children: {} };
+  private static pushPartToIndex(index: Tag.Node, part: string, item: Gallery.Item, rootPart: boolean): Tag.Node {
+    if (!index) index = { tag: part, tagfiltered: Navigation.normalize(part), rootPart, items: [], children: {} };
+    else if (rootPart) index.rootPart = true;
     if (!index.items.includes(item)) index.items.push(item);
     return index;
   }
@@ -125,8 +126,14 @@ export default class IndexFactory {
       .filter(category => category.index && Object.keys(category.index).length)
       .forEach(category => {
         tagsCategories.push(category);
-        tagsRemaining.delete(category.tag);
-        Object.values(category.index).map(node => node.tag).forEach(tag => tagsRemaining.delete(tag));
+
+        if (!tagsIndex[category.tag].rootPart)
+          tagsRemaining.delete(category.tag);
+
+        Object.values(category.index)
+          .map(node => node.tag)
+          .filter(tag => !tagsIndex[tag].rootPart)
+          .forEach(tag => tagsRemaining.delete(tag));
       });
     tagsCategories.push({ tag: "", index: Object.fromEntries(tagsRemaining) });
     return tagsCategories;