Enhancing the import CSV function

android/app/src/main/res/xml/provider_paths.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<paths xmlns:android="http://schemas.android.com/apk/res/android">
+    <!-- Internal app cache directory (for temp files before sharing) -->
+    <cache-path name="cache" path="." />
+
+    <!-- External cache directory (scoped storage) -->
+    <external-cache-path name="external_cache" path="." />
+
+    <!-- Documents directory (Downloads folder) -->
+    <external-path name="external_files" path="Download/" />
+
+    <!-- Internal files directory -->
+    <files-path name="files" path="." />
+
+    <!-- External files directory -->
+    <external-files-path name="external_app_files" path="." />
+</paths>

src/layout/navigation/Tabs/CustomTabBar.tsx

@@ -119,9 +119,31 @@ const CustomTabBar: React.FC<CustomTabBarProps> = ({state, navigation}) => {
     navigation.navigate('Ai');
   };
 
-  const handleImportSubjects = () => {
-    // Navigate to import subjects screen when implemented
-    console.log('Import Subjects pressed');
+  const handleImportSubjects = async () => {
+    try {
+      const { pickCSVFileRaw } = require('../../../utils/csv-picker');
+      const { importAndAddToRegisterFromContent } = require('../../../utils/csv-import');
+
+      console.log('Import Subjects pressed - starting CSV picker...');
+
+      // Pick CSV file and get raw content
+      const csvContent = await pickCSVFileRaw();
+
+      if (csvContent) {
+        console.log('CSV file selected, starting import...');
+        // Import and add to current register
+        await importAndAddToRegisterFromContent(csvContent);
+      } else {
+        console.log('No CSV file selected');
+      }
+    } catch (error) {
+      console.error('Error importing subjects:', error);
+      const { Alert } = require('react-native');
+      Alert.alert(
+        'Import Failed',
+        `Failed to import subjects: ${error instanceof Error ? error.message : 'Unknown error'}`
+      );
+    }
   };
 
   return (

src/screens/user-settings/SettingsScreen.tsx

@@ -18,6 +18,8 @@ import Slider from '@react-native-community/slider';
 import MultiSelect from 'react-native-multiple-select';
 import useStore from '../../store/store';
 import { saveScheduleToDevice, shareSchedule } from '../../utils/exportSchedule';
+import pickCSVFile, { pickCSVFileRaw } from '../../utils/csv-picker';
+import { importAndAddToRegisterFromContent } from '../../utils/csv-import';
 
 // Constants
 const packageJson = require('../../../package.json');
@@ -41,6 +43,7 @@ const SettingsScreen: React.FC = () => {
     setSelectedSchedules,
     notificationLeadTime,
     setNotificationLeadTime,
+    addMultipleCards,
   } = useStore();
 
   const [darkMode, setDarkMode] = useState(true);
@@ -158,6 +161,40 @@ const SettingsScreen: React.FC = () => {
     }
   };
 
+  const handleImportSchedule = async () => {
+    try {
+      console.log('Starting CSV import...');
+
+      if (!registers[activeRegister]) {
+        Alert.alert('Error', 'No active register found. Please create a register first.');
+        return;
+      }
+
+      // Use raw CSV content instead of parsed data
+      const csvContent = await pickCSVFileRaw();
+      console.log('Raw CSV Content received:', csvContent);
+
+      if (!csvContent) {
+        console.log('No CSV content received (user cancelled or error)');
+        return;
+      }
+
+      // Use the import utility with the current active register
+      const currentCards = registers[activeRegister]?.cards || [];
+      await importAndAddToRegisterFromContent(
+        csvContent,
+        activeRegister,
+        currentCards,
+        addMultipleCards
+      );
+
+    } catch (error) {
+      console.error('Import schedule error:', error);
+      const errorMessage = error instanceof Error ? error.message : 'Unknown error';
+      Alert.alert('Error', `Failed to import schedule: ${errorMessage}`);
+    }
+  };
+
   const clearAllData = () => {
     Alert.alert(
       'Clear All Data',
@@ -326,6 +363,19 @@ const SettingsScreen: React.FC = () => {
             </View>
           </View>
         </TouchableOpacity>
+
+        <TouchableOpacity style={styles.utilityButton} onPress={handleImportSchedule}>
+          <View style={styles.utilityButtonContent}>
+            <Image 
+              source={require('../../assets/icons/export.png')} 
+              style={styles.utilityIcon} 
+            />
+            <View style={styles.utilityTextContainer}>
+              <Text style={styles.utilityButtonText}>Import Schedule from CSV</Text>
+              <Text style={styles.utilityButtonDescription}>Import subjects from a CSV file</Text>
+            </View>
+          </View>
+        </TouchableOpacity>
       </View>
 
       {/* Data Management */}

src/store/store.ts

@@ -59,6 +59,7 @@ interface StoreState {
   removeCard: (registerId: number, cardIndex: number) => void;
   addAiCard: (registerId: number, aiCard: AiCardInterface) => void;
   addMultipleAiCards: (registerId: number, aiCards: AiCardInterface[]) => void;
+  addMultipleCards: (registerId: number, cards: CardInterface[]) => void;
   setRegisterColor: (registerId: number, color: string) => void;
 }
 
@@ -643,6 +644,22 @@ export const useStore = create<StoreState>()(
           };
         }),
 
+      addMultipleCards: (registerId: number, cards: CardInterface[]) =>
+        set(state => {
+          const currentCards = state.registers[registerId]?.cards || [];
+
+          return {
+            registers: {
+              ...state.registers,
+              [registerId]: {
+                ...state.registers[registerId],
+                cards: [...currentCards, ...cards],
+              },
+            },
+            updatedAt: new Date(),
+          };
+        }),
+
       setRegisterColor: (registerId: number, color: string) =>
         set(state => ({
           registers: {

src/utils/csv-export.ts

@@ -12,6 +12,7 @@ export function generateRegisterCSV(registers: { name: string, cards: CardInterf
     const register = registers[0];
     csv += `${register.name}\n\n`;
 
+    // First, add all subjects with their scheduled time slots
     dayKeys.forEach((dayKey, i) => {
       const subjectRows: string[] = [];
       register.cards.forEach(card => {
@@ -27,7 +28,25 @@ export function generateRegisterCSV(registers: { name: string, cards: CardInterf
         csv += subjectRows.join('\n') + '\n\n';
       }
     });
+
+    // Add a section for subjects without any time slots
+    const subjectsWithoutSlots = register.cards.filter(card => {
+      return dayKeys.every(dayKey => {
+        const slots = card.days[dayKey] || [];
+        return slots.length === 0;
+      });
+    });
+
+    if (subjectsWithoutSlots.length > 0) {
+      csv += `Subjects Without Time Slots\n`;
+      csv += `Subject,Start Time,End Time,Room\n`;
+      subjectsWithoutSlots.forEach(card => {
+        csv += `${card.title},Not Scheduled,Not Scheduled,Not Assigned\n`;
+      });
+      csv += '\n';
+    }
   } else {
+    // Handle multiple registers
     dayKeys.forEach((dayKey, i) => {
       let daySection = `,Day: ${dayNames[i]}\n`;
 
@@ -50,6 +69,25 @@ export function generateRegisterCSV(registers: { name: string, cards: CardInterf
         csv += daySection;
       }
     });
+
+    // Add sections for subjects without time slots for each register
+    registers.forEach(register => {
+      const subjectsWithoutSlots = register.cards.filter(card => {
+        return dayKeys.every(dayKey => {
+          const slots = card.days[dayKey] || [];
+          return slots.length === 0;
+        });
+      });
+
+      if (subjectsWithoutSlots.length > 0) {
+        csv += `,${register.name} - Subjects Without Time Slots\n`;
+        csv += `,Subject,Start Time,End Time,Room\n`;
+        subjectsWithoutSlots.forEach(card => {
+          csv += `,${card.title},Not Scheduled,Not Scheduled,Not Assigned\n`;
+        });
+        csv += '\n';
+      }
+    });
   }
 
   return csv;