Polish

src/app/pdf/[id]/page.tsx

@@ -4,7 +4,7 @@ import dynamic from 'next/dynamic';
 import { usePDF } from '@/contexts/PDFContext';
 import { useParams } from 'next/navigation';
 import Link from 'next/link';
-import { useEffect, useState } from 'react';
+import { use, useCallback, useEffect, useState } from 'react';
 import { PDFSkeleton } from '@/components/PDFSkeleton';
 import { useTTS } from '@/contexts/TTSContext';
 
@@ -25,24 +25,26 @@ export default function PDFViewerPage() {
   const [isLoading, setIsLoading] = useState(true);
   const [zoomLevel, setZoomLevel] = useState<number>(100);
 
-  useEffect(() => {
+  const loadDocument = useCallback(async () => {
-    async function loadDocument() {
+    if (!isLoading) return; // Prevent calls when not loading new doc
-      try {
+    console.log('Loading new document (from page.tsx)');
-        if (!id) {
+    try {
-          setError('Document not found');
+      if (!id) {
-          return;
+        setError('Document not found');
-        }
+        return;
-        setCurrentDocument(id as string);
-      } catch (err) {
-        console.error('Error loading document:', err);
-        setError('Failed to load document');
-      } finally {
-        setIsLoading(false);
       }
+      setCurrentDocument(id as string);
+    } catch (err) {
+      console.error('Error loading document:', err);
+      setError('Failed to load document');
+    } finally {
+      setIsLoading(false);
     }
+  }, [isLoading, id, setCurrentDocument]);
 
+  useEffect(() => {
     loadDocument();
-  }, [id, setCurrentDocument]);
+  }, [loadDocument]);
 
   const handleZoomIn = () => setZoomLevel(prev => Math.min(prev + 10, 200));
   const handleZoomOut = () => setZoomLevel(prev => Math.max(prev - 10, 50));

src/components/PDFViewer.tsx

@@ -8,8 +8,6 @@ import { useState, useEffect, useRef } from 'react';
 import { PDFSkeleton } from './PDFSkeleton';
 import { useTTS } from '@/contexts/TTSContext';
 import { usePDF } from '@/contexts/PDFContext';
-import { pdfjs } from 'react-pdf';
-import type { TextItem } from 'pdfjs-dist/types/src/display/api';
 import TTSPlayer from '@/components/player/TTSPlayer';
 
 interface PDFViewerProps {

src/contexts/PDFContext.tsx

@@ -51,7 +51,6 @@ interface PDFContextType {
     isProcessing: boolean
   ) => void;
   onDocumentLoadSuccess: ({ numPages }: { numPages: number }) => void;
-  convertPDFDataToURL: (pdfData: Blob) => Promise<string>;
   setCurrentDocument: (id: string) => Promise<void>;
   currDocURL: string | undefined;
   currDocName: string | undefined;
@@ -267,7 +266,7 @@ export function PDFProvider({ children }: { children: ReactNode }) {
       console.error('Failed to get document URL:', error);
       setError('Failed to retrieve the document. Please try again.');
     }
-  }, [getDocument, convertPDFDataToURL, loadCurrDocText]);
+  }, [getDocument, loadCurrDocText]);
 
   // Clear all highlights in the PDF viewer
   const clearHighlights = useCallback(() => {
@@ -458,7 +457,6 @@ export function PDFProvider({ children }: { children: ReactNode }) {
       clearHighlights,
       handleTextClick,
       onDocumentLoadSuccess,
-      convertPDFDataToURL,
       setCurrentDocument,
       currDocURL,
       currDocName,
@@ -478,7 +476,6 @@ export function PDFProvider({ children }: { children: ReactNode }) {
       clearHighlights,
       handleTextClick,
       onDocumentLoadSuccess,
-      convertPDFDataToURL,
       setCurrentDocument,
       currDocURL,
       currDocName,

src/contexts/TTSContext.tsx

@@ -89,11 +89,9 @@ export function TTSProvider({ children }: { children: React.ReactNode }) {
     console.log('Setting page text:', text);
     const newSentences = splitIntoSentences(text);
     setSentences(newSentences);
-    //setCurrentIndex(0);
-    //setIsPlaying(false);
 
     // Clear audio cache
-    audioCacheRef.current.clear();
+    //audioCacheRef.current.clear();
 
     setNextPageLoading(false);
   }, []);
@@ -116,35 +114,51 @@ export function TTSProvider({ children }: { children: React.ReactNode }) {
     });
   }, [abortAudio]);
 
+  const advance = useCallback(async (backwards = false) => {
+    setCurrentIndex((prev) => {
+      const nextIndex = prev + (backwards ? -1 : 1);
+      if (nextIndex < sentences.length && nextIndex >= 0) {
+        console.log('Advancing to next sentence:', sentences[nextIndex]);
+        return nextIndex;
+      } else if (nextIndex >= sentences.length && currDocPage < currDocPages!) {
+        console.log('Advancing to next page:', currDocPage + 1);
+
+        setNextPageLoading(true);
+        setCurrDocPage(currDocPage + 1);
+
+        return 0;
+      } else if (nextIndex < 0 && currDocPage > 1) {
+        console.log('Advancing to previous page:', currDocPage - 1);
+
+        setNextPageLoading(true);
+        setCurrDocPage(currDocPage - 1);
+
+        return 0;
+      }
+      return prev;
+    });
+  }, [sentences, currDocPage, currDocPages]);
+  
 
   const skipForward = useCallback(() => {
     setIsProcessing(true);
 
     abortAudio();
 
-    setCurrentIndex((prev) => {
+    advance();
-      const nextIndex = Math.min(prev + 1, sentences.length - 1);
-      console.log('Skipping forward to:', sentences[nextIndex]);
-      return nextIndex;
-    });
 
     setIsProcessing(false);
-  }, [sentences, abortAudio]);
+  }, [abortAudio, advance]);
 
   const skipBackward = useCallback(() => {
     setIsProcessing(true);
 
     abortAudio();
 
-    setCurrentIndex((prev) => {
+    advance(true); // Pass true to go backwards
-      const nextIndex = Math.max(prev - 1, 0);
-      console.log('Skipping backward to:', sentences[nextIndex]);
-      return nextIndex;
-    });
-    
 
     setIsProcessing(false);
-  }, [sentences, abortAudio]);
+  }, [abortAudio, advance]);
 
   // Initialize OpenAI instance when config loads
   useEffect(() => {
@@ -229,30 +243,12 @@ export function TTSProvider({ children }: { children: React.ReactNode }) {
     }
   }, [togglePlay, skipForward, skipBackward]);
 
-  const advance = useCallback(async () => {
-    setCurrentIndex((prev) => {
-      const nextIndex = prev + 1;
-      if (nextIndex < sentences.length) {
-        console.log('Auto-advancing to next sentence:', sentences[nextIndex]);
-        return nextIndex;
-      } else if (currDocPage < currDocPages!) {
-        console.log('Auto-advancing to next page:', currDocPage + 1);
-
-        setNextPageLoading(true);
-        setCurrDocPage(currDocPage + 1);
-
-        return 0;
-      }
-      return prev;
-    });
-  }, [sentences, currDocPage, currDocPages]);
-
   //new function to return audio buffer with caching
   const getAudio = useCallback(async (sentence: string): Promise<AudioBuffer | undefined> => {
     // Check if the audio is already cached
     const cachedAudio = audioCacheRef.current.get(sentence);
     if (cachedAudio) {
-      console.log('Using cached audio for sentence:', sentence);
+      console.log('Using cached audio for sentence:', sentence.substring(0, 20));
       return cachedAudio;
     }
 
@@ -350,7 +346,6 @@ export function TTSProvider({ children }: { children: React.ReactNode }) {
   const preloadNextAudio = useCallback(() => {
     try {
       if (sentences[currentIndex + 1] && !audioCacheRef.current.has(sentences[currentIndex + 1])) {
-        //await new Promise((resolve) => setTimeout(resolve, 200)); // Add small delay
         processSentence(sentences[currentIndex + 1], true); // True indicates preloading
       }
     } catch (error) {