feat: add conditional rendering to properties panel with text size functionality

apps/web/src/components/editor/properties-panel.tsx

@@ -4,25 +4,74 @@ import { useProjectStore } from "@/stores/project-store";
 import { useAspectRatio } from "@/hooks/use-aspect-ratio";
 import { Label } from "../ui/label";
 import { ScrollArea } from "../ui/scroll-area";
+import { useTimelineStore } from "@/stores/timeline-store";
+import { Input } from "../ui/input";
+import { MediaElement, TextElement } from "@/types/timeline";
+import { useMediaStore } from "@/stores/media-store";
 
 export function PropertiesPanel() {
   const { activeProject } = useProjectStore();
   const { getDisplayName, canvasSize } = useAspectRatio();
+  const { selectedElements, tracks, updateTextElement } = useTimelineStore();
+  const { mediaItems } = useMediaStore();
+
+  const emptyView = (
+    <div className="space-y-4 p-5">
+      {/* Media Properties */}
+      <div className="flex flex-col gap-3">
+        <PropertyItem label="Name:" value={activeProject?.name || ""} />
+        <PropertyItem label="Aspect ratio:" value={getDisplayName()} />
+        <PropertyItem
+          label="Resolution:"
+          value={`${canvasSize.width} × ${canvasSize.height}`}
+        />
+        <PropertyItem label="Frame rate:" value="30.00fps" />
+      </div>
+    </div>
+  );
+
+  const TextProperties = (element: TextElement, trackId: string) => (
+    <div className="space-y-4 p-5">
+      <Input
+        placeholder="Name"
+        defaultValue={element.content}
+        onChange={(e) =>
+          updateTextElement(trackId, element.id, { content: e.target.value })
+        }
+      />
+    </div>
+  );
+
+  const MediaProperties = (element: MediaElement) => {
+    const mediaItem = mediaItems.find((item) => item.id === element.mediaId);
+
+    if (mediaItem?.type === "audio") {
+      return <div className="space-y-4 p-5">Audio properties</div>;
+    }
+
+    // video or image
+    return <div className="space-y-4 p-5">Video/Image properties</div>;
+  };
+
+  const ElementProperties = (
+    <>
+      {selectedElements.map(({ trackId, elementId }) => {
+        const track = tracks.find((t) => t.id === trackId);
+        const element = track?.elements.find((e) => e.id === elementId);
+
+        if (element?.type === "text") {
+          return <div key={elementId}>{TextProperties(element, trackId)}</div>;
+        }
+        if (element?.type === "media") {
+          return <div key={elementId}>{MediaProperties(element)}</div>;
+        }
+      })}
+    </>
+  );
 
   return (
     <ScrollArea className="h-full bg-panel rounded-sm">
-      <div className="space-y-4 p-5">
-        {/* Media Properties */}
-        <div className="flex flex-col gap-3">
-          <PropertyItem label="Name:" value={activeProject?.name || ""} />
-          <PropertyItem label="Aspect ratio:" value={getDisplayName()} />
-          <PropertyItem
-            label="Resolution:"
-            value={`${canvasSize.width} × ${canvasSize.height}`}
-          />
-          <PropertyItem label="Frame rate:" value="30.00fps" />
-        </div>
-      </div>
+      {selectedElements.length > 0 ? ElementProperties : emptyView}
     </ScrollArea>
   );
 }

apps/web/src/stores/timeline-store.ts

@@ -4,6 +4,7 @@ import {
   TimelineElement,
   CreateTimelineElement,
   TimelineTrack,
+  TextElement,
   sortTracksByOrder,
   ensureMainTrack,
   validateElementTrackCompatibility,
@@ -136,6 +137,28 @@ interface TimelineStore {
   loadProjectTimeline: (projectId: string) => Promise<void>;
   saveProjectTimeline: (projectId: string) => Promise<void>;
   clearTimeline: () => void;
+  updateTextElement: (
+    trackId: string,
+    elementId: string,
+    updates: Partial<
+      Pick<
+        TextElement,
+        | "content"
+        | "fontSize"
+        | "fontFamily"
+        | "color"
+        | "backgroundColor"
+        | "textAlign"
+        | "fontWeight"
+        | "fontStyle"
+        | "textDecoration"
+        | "x"
+        | "y"
+        | "rotation"
+        | "opacity"
+      >
+    >
+  ) => void;
 }
 
 export const useTimelineStore = create<TimelineStore>((set, get) => {
@@ -494,6 +517,24 @@ export const useTimelineStore = create<TimelineStore>((set, get) => {
       );
     },
 
+    updateTextElement: (trackId, elementId, updates) => {
+      get().pushHistory();
+      updateTracksAndSave(
+        get()._tracks.map((track) =>
+          track.id === trackId
+            ? {
+                ...track,
+                elements: track.elements.map((element) =>
+                  element.id === elementId && element.type === "text"
+                    ? { ...element, ...updates }
+                    : element
+                ),
+              }
+            : track
+        )
+      );
+    },
+
     splitElement: (trackId, elementId, splitTime) => {
       const { _tracks } = get();
       const track = _tracks.find((t) => t.id === trackId);