ui: Solve scenario loading mess

frontend/ui/src/lib/stores/exercices.js

@@ -0,0 +1,19 @@
+import { derived, writable } from 'svelte/store';
+
+import { exercices_idx_urlid } from './themes';
+
+export const set_current_exercice = writable(null)
+
+export const current_exercice = derived(
+  [set_current_exercice, exercices_idx_urlid],
+  ([$set_current_exercice, $exercices_idx_urlid]) => {
+    if ($exercices_idx_urlid === null || Object.keys($exercices_idx_urlid).length == 0) {
+      return null;
+    }
+
+    if ($exercices_idx_urlid[$set_current_exercice])
+      return $exercices_idx_urlid[$set_current_exercice];
+
+    return undefined;
+  }
+)

frontend/ui/src/lib/stores/themes.js

@@ -78,6 +78,22 @@ export const themes = derived(
   },
 );
 
+export const themes_idx = derived(
+  themes,
+  ($themes) => {
+    const ret = {};
+
+    for (const key in $themes) {
+      const theme = $themes[key];
+
+      ret[theme.urlid] = theme;
+    }
+
+    return ret;
+  },
+  null,
+);
+
 export const exercices_idx = derived(
   themesStore,
   ($themesStore) => {
@@ -94,6 +110,23 @@ export const exercices_idx = derived(
   },
 );
 
+export const exercices_idx_urlid = derived(
+  themesStore,
+  ($themesStore) => {
+    const ret = {};
+
+    for (const key in $themesStore) {
+      const theme = $themesStore[key];
+      for (let k in theme.exercices) {
+        ret[theme.exercices[k].urlid] = theme.exercices[k];
+      }
+    }
+
+    return ret;
+  },
+  null
+);
+
 export const max_solved = derived(
   themesStore,
   ($themesStore) => {
@@ -109,3 +142,19 @@ export const max_solved = derived(
     return ret;
   },
 );
+
+export const set_current_theme = writable(null)
+
+export const current_theme = derived(
+  [set_current_theme, themes_idx],
+  ([$set_current_theme, $themes_idx]) => {
+    if ($themes_idx === null || Object.keys($themes_idx).length == 0) {
+      return null;
+    }
+
+    if ($themes_idx[$set_current_theme])
+      return $themes_idx[$set_current_theme];
+
+    return undefined;
+  }
+)