finish normal user;

check out finish;
enhance ui;
fix bugs

.gitignore

@@ -2,3 +2,5 @@ main.exe
 .VSCodeCounter/*
 .vscode/*
 .vscode/settings.json
+data_file_transaction.txt
+

admin_user.h

@@ -6,6 +6,8 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif
 
 #ifndef MENU_H

data_file_admin.txt

@@ -0,0 +1,4 @@
+#name of role that are consider as admin
+Teacher
+Staff
+Admin

database.h

@@ -6,6 +6,8 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif
 #ifndef DNT_H
 #define DNT_H
@@ -15,7 +17,7 @@ typedef struct basic_db{
     int row_count;
     bool init_status;
     //array of struct of row
-};
+}basic_db;
 
 //inventory
 #define INVENTORY_DB "data_file_inventory.txt"
@@ -23,7 +25,7 @@ typedef struct inventory{
     struct basic_db db;
     struct inventory_row* row;
     
-};
+}inventory;
 typedef struct inventory_row{
     char category[100];
     char brand[100];
@@ -32,7 +34,7 @@ typedef struct inventory_row{
     int stock;
     long barcode;
     bool isdeleted;//common for all rows,default is false
-};
+}inventory_row;
 typedef enum  {
     category = 1, brand = 2, product = 3, price_inv = 4, stock = 5, barcode_inv = 6
  }INVENTORY;
@@ -43,18 +45,18 @@ typedef struct transaction{
     struct basic_db db;
     struct transaction_row* row;
     
-};
+}transaction;
 typedef struct transaction_row{
-    struct date date;
+    struct Date date;
-    struct time time;
+    struct Time time;
     long id;
     double price;
     int quantity;
     long barcode;
     bool isdeleted;//common for all rows,default is false
-};
+}transaction_row;
 typedef enum {
-    date = 1, time = 2, id_tran = 3, price_tran = 4, quantity = 5, barcode_tran = 6
+    date = 1, TIME = 2, id_tran = 3, price_tran = 4, quantity = 5, barcode_tran = 6
  }TRANSACTION;
 #define ENDOFTRANSACTION 6
 //user
@@ -62,21 +64,45 @@ typedef enum {
 typedef struct user{
     struct basic_db db;
     struct user_row* row;
-};
+}user;
 typedef struct user_row{
     char name[100];
     char role[100];
     long id;
     bool isAdmin;
     bool isdeleted;//common for all rows,default is false
-};
+}user_row;
 
 typedef enum {
     name = 1, role = 2, id_user = 3
  }USER;
 #define ENDOFUSER 3
 
+//admin verify
+#define ADMIN_DB "data_file_admin.txt"
+//func for admin verify
 
+bool is_admin(char* role){
+    FILE* fp = fopen(ADMIN_DB,"r");
+    if(fp == NULL){
+        printf("Error opening file\n");
+        return false;
+    }
+    char line[100];
+    while(fgets(line,100,fp) != NULL){
+        if(line[0] == '#') continue;
+
+        if(line[strlen(line)-1] == '\n')
+            line[strlen(line)-1] = '\0';
+        
+        if(strcmp(line,role) == 0){
+            fclose(fp);
+            return true;
+        }
+    }
+    fclose(fp);
+    return false;
+}
 
 //list of db func
 int basic_get_row_count(int end, FILE *fp){
@@ -119,6 +145,10 @@ struct inventory read_db_invt(){//please open file in read mode
             if(buffer[0] == '#'){//catch comment line and ignore
                 j--;//decrement j to prevent skipping next column
             }else{
+
+                if(buffer[strlen(buffer)-1] == '\n')
+                    buffer[strlen(buffer)-1] = '\0';
+
                 switch(j){
                     case category:
                         strcpy(db.row[i].category,buffer);
@@ -175,11 +205,14 @@ struct transaction read_db_tran(){
             if(buffer[0] == '#'){//catch comment line and ignore
                 j--;//decrement j to prevent skipping next column
             }else{
+                if(buffer[strlen(buffer)-1] == '\n')
+                    buffer[strlen(buffer)-1] = '\0';
+
                 switch(j){
                     case date:
                         db.row[i].date = convert_to_date(buffer);
                         break;
-                    case time:
+                    case TIME:
                         db.row[i].time = convert_to_time(buffer);
                         break;
                     case id_tran:
@@ -228,6 +261,9 @@ struct user read_db_user(){
             if(buffer[0] == '#'){//catch comment line and ignore
                 j--;//decrement j to prevent skipping next column
             }else{
+                if(buffer[strlen(buffer)-1] == '\n')
+                    buffer[strlen(buffer)-1] = '\0';
+
                 switch(j){
                     case name:
                         strcpy(db.row[i].name,buffer);
@@ -253,7 +289,7 @@ struct user read_db_user(){
     return db;
 }
 
-bool update_db_invt(struct inventory* invt){
+bool update_db_invt(struct inventory invt){
     FILE* fpR = fopen(INVENTORY_DB,"r");
     char temp[30] = INVENTORY_DB;
     strcat(temp,".temp");
@@ -262,11 +298,11 @@ bool update_db_invt(struct inventory* invt){
         printf("Error in opening file\n");
         return false;
     }
-    for(int i=0;i<invt->db.row_count;i++){
+    for(int i=0;i<invt.db.row_count;i++){
-        if(invt->row[i].isdeleted == true){
+        if(invt.row[i].isdeleted == true){
             continue;
         }
-        for(INVENTORY j=category;j<ENDOFINVENTORY;j++){
+        for(INVENTORY j=category;j<=ENDOFINVENTORY;j++){
             char buffer[100];
             do{
                 if(feof(fpR)){
@@ -279,22 +315,22 @@ bool update_db_invt(struct inventory* invt){
             }while(buffer[0] == '#');
             switch(j){
                 case category:
-                    fprintf(fpW,"%s",invt->row[i].category);
+                    fprintf(fpW,"%s",invt.row[i].category);
                     break;
                 case brand:
-                    fprintf(fpW,"%s",invt->row[i].brand);
+                    fprintf(fpW,"%s",invt.row[i].brand);
                     break;
                 case product:
-                    fprintf(fpW,"%s",invt->row[i].product);
+                    fprintf(fpW,"%s",invt.row[i].product);
                     break;
                 case price_inv:
-                    fprintf(fpW,"%f",invt->row[i].price);
+                    fprintf(fpW,"%.1f",invt.row[i].price);
                     break;
                 case stock:
-                    fprintf(fpW,"%d",invt->row[i].stock);
+                    fprintf(fpW,"%d",invt.row[i].stock);
                     break;
                 case barcode_inv:
-                    fprintf(fpW,"%ld",invt->row[i].barcode);
+                    fprintf(fpW,"%ld",invt.row[i].barcode);
                     break;
             }
             fprintf(fpW,"\n");
@@ -309,7 +345,7 @@ bool update_db_invt(struct inventory* invt){
     
 }
 
-bool update_db_tran(struct transaction* tran){
+bool update_db_tran(struct transaction tran){
     FILE* fpR = fopen(TRANSACTION_DB,"r");
     char temp[30] = TRANSACTION_DB;
     strcat(temp,".temp");
@@ -318,11 +354,11 @@ bool update_db_tran(struct transaction* tran){
         printf("Error in opening file\n");
         return false;
     }
-    for(int i=0;i<tran->db.row_count;i++){
+    for(int i=0;i<tran.db.row_count;i++){
-        if(tran->row[i].isdeleted == true){
+        if(tran.row[i].isdeleted == true){
             continue;
         }
-        for(TRANSACTION j=date;j<ENDOFTRANSACTION;j++){
+        for(TRANSACTION j=date;j<=ENDOFTRANSACTION;j++){
             char buffer[100];
             do{
                 if(feof(fpR)){
@@ -335,22 +371,22 @@ bool update_db_tran(struct transaction* tran){
             }while(buffer[0] == '#');
             switch(j){
                 case date:
-                    fprintf(fpW,"%d-%d-%d",tran->row[i].date.day,tran->row[i].date.month,tran->row[i].date.year);
+                    fprintf(fpW,"%d-%02d-%02d",tran.row[i].date.year,tran.row[i].date.month,tran.row[i].date.day);
                     break;
-                case time:
+                case TIME:
-                    fprintf(fpW,"%d:%d:%d",tran->row[i].time.hour,tran->row[i].time.minute,tran->row[i].time.second);
+                    fprintf(fpW,"%02d:%02d:%02d",tran.row[i].time.hour,tran.row[i].time.minute,tran.row[i].time.second);
                     break;
                 case id_tran:
-                    fprintf(fpW,"%ld",tran->row[i].id);
+                    fprintf(fpW,"%ld",tran.row[i].id);
                     break;
                 case price_tran:
-                    fprintf(fpW,"%f",tran->row[i].price);
+                    fprintf(fpW,"%.1f",tran.row[i].price);
                     break;
                 case quantity:
-                    fprintf(fpW,"%d",tran->row[i].quantity);
+                    fprintf(fpW,"%d",tran.row[i].quantity);
                     break;
                 case barcode_tran:
-                    fprintf(fpW,"%ld",tran->row[i].barcode);
+                    fprintf(fpW,"%ld",tran.row[i].barcode);
                     break;
             }
             fprintf(fpW,"\n");
@@ -364,7 +400,7 @@ bool update_db_tran(struct transaction* tran){
     return true;
 }
 
-bool update_db_user(struct user* user){
+bool update_db_user(struct user user){
     FILE* fpR = fopen(USER_DB,"r");
     char temp[30] = USER_DB;
     strcat(temp,".temp");
@@ -373,11 +409,11 @@ bool update_db_user(struct user* user){
         printf("Error in opening file\n");
         return false;
     }
-    for(int i=0;i<user->db.row_count;i++){
+    for(int i=0;i<user.db.row_count;i++){
-        if(user->row[i].isdeleted == true){
+        if(user.row[i].isdeleted == true){
             continue;
         }
-        for(USER j=name;j<ENDOFUSER;j++){
+        for(USER j=name;j<=ENDOFUSER;j++){
             char buffer[100];
             do{
                 if(feof(fpR)){
@@ -390,13 +426,13 @@ bool update_db_user(struct user* user){
             }while(buffer[0] == '#');
             switch(j){
                 case name:
-                    fprintf(fpW,"%s",user->row[i].name);
+                    fprintf(fpW,"%s",user.row[i].name);
                     break;
                 case role:
-                    fprintf(fpW,"%s",user->row[i].role);
+                    fprintf(fpW,"%s",user.row[i].role);
                     break;
                 case id_user:
-                    fprintf(fpW,"%ld",user->row[i].id);
+                    fprintf(fpW,"%ld",user.row[i].id);
                     break;
             }
             fprintf(fpW,"\n");
@@ -408,4 +444,118 @@ bool update_db_user(struct user* user){
     remove(USER_DB);
     rename(temp,USER_DB);
     return true;
+}
+
+//checkout db support,
+
+typedef struct cart{//linked list
+    struct inventory_row* row;//pointer to the row
+    int quantity;//quantity of the item
+    struct cart* next;
+}cart;
+
+
+bool append_transaction(struct cart* cart,struct user_row* user){
+    FILE* fp = fopen(TRANSACTION_DB,"a");
+    if(fp == NULL){
+        printf("Error in opening file\n");
+        return false;
+    }
+
+    struct Date date = get_date();
+    struct Time time = get_time();
+    struct cart* temp = cart;
+    if(temp == NULL)
+        return false;
+    
+    do{
+
+        fprintf(fp,"%d-%02d-%02d\n",date.year,date.month,date.day);
+        fprintf(fp,"%02d:%02d:%02d\n",time.hour,time.minute,time.second);
+        fprintf(fp,"%ld\n",user->id);
+        fprintf(fp,"%f\n",temp->row->price);
+        fprintf(fp,"%d\n",temp->quantity);
+        fprintf(fp,"%ld\n",temp->row->barcode);
+        if(temp->next == NULL)
+            break;
+        temp = temp->next;
+    }while(temp->next != NULL);//this while condition just for safety,as it should already break in the if statement
+    fclose(fp);
+    return true;
+}
+
+bool update_stock_N_checkout(struct cart* cart,struct user_row* user){
+    struct inventory invt = read_db_invt();
+    struct cart* temp = cart;
+    if(temp == NULL)
+        return false;
+    do{
+        for(int i=0;i<invt.db.row_count;i++){
+
+            if(invt.row[i].barcode == temp->row->barcode){
+                invt.row[i].stock -= temp->quantity;
+                break;
+            }
+        }
+        if(temp->next == NULL)
+            break;
+        temp = temp->next;
+    }while(temp->next != NULL);//this while condition just for safety,as it should already break in the if statement
+    if(!append_transaction(cart,user)){
+        return false;
+    }
+    if(!update_db_invt(invt)){
+        return false;
+    }
+    return true;
+}
+
+//user
+struct user_row* get_user(long userid){
+    struct user_row* user = (struct user_row*)malloc(sizeof(struct user_row));
+    FILE* fp = fopen(USER_DB,"r");
+    if(fp == NULL){
+        printf("Error in opening file\n");
+        return NULL;
+    }
+    char buffer[100];
+    
+    //gets the number of rows in the file
+    int row_count = basic_get_row_count(ENDOFUSER,fp);
+
+    fseek(fp,0,SEEK_SET);//reset fp to the beginning of the file
+    
+    //read data
+    for(int i=0;i<row_count;i++){
+        for(USER j=name;j<=ENDOFUSER;j++){
+            char buffer[100];
+            fgets(buffer, sizeof(buffer),fp);
+            if(buffer[0] == '#'){//catch comment line and ignore
+                j--;//decrement j to prevent skipping next column
+            }else{
+                if(buffer[strlen(buffer)-1] == '\n'){
+                    buffer[strlen(buffer)-1] = '\0';
+                }
+
+                switch(j){
+                    case name:
+                        strcpy(user->name,buffer);
+                        break;
+                    case role:
+                        strcpy(user->role,buffer);
+                        break;
+                    case id_user:
+                        user->id = atol(buffer);
+                        if(user->id == userid){
+                            fclose(fp);
+                            return user;
+                        }
+                        break;
+                }
+            }
+            
+        }
+    }
+    fclose(fp);
+    return NULL;
 }

dateNtime.h

@@ -6,17 +6,19 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif
 //DATE
-typedef struct date{
+typedef struct Date{
     int day;
     int month;
     int year;
-};
+}Date;
 
 
-struct date convert_to_date(char* date){
+struct Date convert_to_date(char* date){
-    struct date d;
+    struct Date d;
     char* token = strtok(date, "-");
     d.day = atoi(token);
     token = strtok(NULL, "-");
@@ -26,16 +28,28 @@ struct date convert_to_date(char* date){
     return d;
 }
 
+struct Date get_date(){
+    struct Date d;
+    time_t rawtime;
+    struct tm * timeinfo;
+    time(&rawtime);
+    timeinfo = localtime(&rawtime);
+    d.day = timeinfo->tm_mday;
+    d.month = timeinfo->tm_mon + 1;
+    d.year = timeinfo->tm_year + 1900;
+    return d;
+}
+
 //TIME
 
-typedef struct time{
+typedef struct Time{
     int hour;
     int minute;
     int second;
-};
+}Time;
 
-struct time convert_to_time(char* time){
+struct Time convert_to_time(char* time){
-    struct time t;
+    struct Time t;
     char* token = strtok(time, ":");
     t.hour = atoi(token);
     token = strtok(NULL, ":");
@@ -43,4 +57,16 @@ struct time convert_to_time(char* time){
     token = strtok(NULL, ":");
     t.second = atoi(token);
     return t;
+}
+
+struct Time get_time(){
+    struct Time t;
+    time_t rawtime;
+    struct tm * timeinfo;
+    time(&rawtime);
+    timeinfo = localtime(&rawtime);
+    t.hour = timeinfo->tm_hour;
+    t.minute = timeinfo->tm_min;
+    t.second = timeinfo->tm_sec;
+    return t;
 }

filecontrol.h

@@ -6,4 +6,6 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif

main.c

@@ -6,6 +6,8 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif
 #ifndef CUSTOM_H
 #define CUSTOM_H

menu.h

@@ -6,6 +6,8 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif
 
 

normal_user.h

@@ -6,6 +6,8 @@
 #include<string.h>
 #include<stdbool.h>
 #include<math.h>
+#include<time.h>
+#include<ctype.h>
 #endif
 
 #ifndef MENU_H
@@ -62,7 +64,7 @@ void show_item(struct inventory db,int index){
     system("cls");
     printf("Product: %s\n", db.row[index].product);
     printf("Catergory: %s\n", db.row[index].category);
-    printf("Brand: %d\n", db.row[index].brand);
+    printf("Brand: %s\n", db.row[index].brand);
     printf("Price: $%lf\n", db.row[index].price);
     printf("Stock: %d\n", db.row[index].stock);
     printf("Barcode: %ld\n",db.row[index].barcode);
@@ -97,8 +99,8 @@ void list_page(struct inventory db,struct Map* map,int row){//user for showing l
     printf("2 sort name ascending\n");
     printf("3 sort price decending\n");
     printf("4 sort price ascending\n");
-    printf("5 sort band decending\n");
+    printf("5 sort brand decending\n");
-    printf("6 sort band ascending\n");
+    printf("6 sort brand ascending\n");
     printf("7 sort category decending\n");
     printf("8 sort category ascending\n");
     printf("List of items:\n");
@@ -119,6 +121,7 @@ void list_page(struct inventory db,struct Map* map,int row){//user for showing l
     //prompt user to select an item
     bool valid = true; 
     do{
+        valid = true;
         printf("Enter your choice: ");
         fflush(stdin);
         scanf("%d", &choice);
@@ -186,7 +189,7 @@ struct Map* sortItems(struct inventory db, int sort){
             case 3:
             case 4:
                 long price = db.row[i].price * 100;
-                map[i].value = (void*)price;//presume there is no price contain  0.001
+                map[i].value = (long*)price;//presume there is no price contain  0.001
                 break;
             case 5:
             case 6:
@@ -245,6 +248,7 @@ void search_item(){
         if(breakout == 1 || breakout == 0){
             valid = true;
         }else{
+            valid = false;
             printf("Invalid choice\n");
         }
     }while(!valid);
@@ -255,7 +259,7 @@ void search_item(){
     printf("searching...\n");
     map = searchItems(db,searchstr);
     if(map[0].value > 0){
-        list_page(db,map+1,map[0].value);//ofset map, as it is use to store the size
+        list_page(db,map+1,(int)map[0].value);//ofset map, as it is use to store the size
     }else{//empty search
         printf("No result found\n");
         printf("Press any key to continue\n");
@@ -310,17 +314,13 @@ struct Map* searchItems(struct inventory db, char* searchstr){
             k++;
         }
     }
-    map[0].value = k-1;
+    map[0].value = (int*)(k-1);
     map[0].key = -1;
     return map;
 }
 
 //self help
-typedef struct cart{//linked list
+
-    struct inventory_row* row;//pointer to the row
-    int quantity;//quantity of the item
-    struct cart* next;
-};
 
 int self_choice();
 struct cart* scan_barcode(struct cart* cart,struct inventory db);
@@ -491,8 +491,15 @@ struct cart* scan_barcode(struct cart* cart,struct inventory db){
                 getchar();
                 return cart;
             }
-            printf("Are you sure you want to add this item to cart?(y/n)");
+            printf("Are you sure you want to add this item to cart?(y/n)\n>");
+            fflush(stdin);
             scanf("%c", &choice);
+            if(row->stock - quantity < 0 && choice == 'y'){
+                printf("WARNING:not enough stock\n");
+                printf("Are you sure the quantity is correct?\n(y to ignore and continue/n)\n>");
+                fflush(stdin);
+                scanf("%c", &choice);
+            }
         }while(choice != 'y');
         if(quantity != 0){
             cart = Cartappend(cart,row,quantity);
@@ -520,7 +527,6 @@ long prompt_barcode(){
 struct inventory_row* find_barcode(struct inventory db,long barcode){
     struct inventory_row row;
     for (int i = 0; i < db.db.row_count; i++){
-        printf("%ld\n",db.row[i].barcode);
         if(db.row[i].barcode == barcode){
             
             return &db.row[i];
@@ -549,16 +555,22 @@ struct cart* list_cart(struct cart* cart){
                 int qty = temp->quantity;
                 double price = temp->row->price * qty;
                 total_price += price;
-                printf("%d product:%s price:$%lf\n quantity:%d\n",i,temp->row->product,price,qty);
+                printf("%d product:%s\n",i,temp->row->product);
+                printf("  price(per qty): %.2f\n",temp->row->price);//space to align
+                printf("  price(total): %.2f\n",price);
+                printf("  quantity: %d\n",qty);
                 printf("<------------------------>\n");
                 temp = temp->next;
                 i++;
             }
+            printf("\n<------------------------>\n");
             printf("Total price: $%.2f\n",total_price);
-            printf("%d checkout\n",i);
+            printf("<------------------------>\n");
+
+            printf("\n%d CHECKOUT\n",i);
         }
         do{
-            printf("input the corrisponding value for more action\n>");
+            printf("input the corresponding value for more action\n>");
             fflush(stdin);
             scanf("%d", &choice);
             if(choice >0 && choice < i){
@@ -642,11 +654,57 @@ struct cart* update_cart(struct cart* cart,int index){
 //TODO checkout
 
 struct cart* checkout(struct cart* cart){
-//TODO:write db func for transaction
-//TODO:write db func for user
-//TODO:update stock
     system("cls");
     welcome_message();
-   
+    
+    long user_id = 0;
+    printf("Please tap your card(student card, staff card,etc)(or input the id)(0 to cancel)\n>");
+    scanf("%ld", &user_id);
+    if(user_id == 0){
+        printf("cancelled\n");
+        printf("press any key to continue\n");
+        fflush(stdin);
+        getchar();
+        return cart;
+    }
+    struct user_row* user = get_user(user_id);
+
+
+    if(user == NULL){
+        printf("Fail to indentify your card or error occurs\n");
+        printf("press any key to continue\n");
+        fflush(stdin);
+        getchar();
+        return cart;
+    }else{
+        printf("Welcome %s(%s)\n",user->name,user->role);
+        printf("Are you sure you want to checkout?(y/n)\n>");
+        char choice;
+        fflush(stdin);
+        scanf("%c", &choice);
+        if(choice == 'y'){
+            if(update_stock_N_checkout(cart,user)){//catch err
+                printf("Checkout successful\n");
+                printf("press any key to continue\n");
+                fflush(stdin);
+                getchar();
+                return NULL;
+            }else{
+                printf("Checkout failed(files maybe corrputed)\n");
+                printf("press any key to continue\n");
+                fflush(stdin);
+                getchar();
+                return cart;
+            }
+        }else{
+            printf("cancelled\n");
+            printf("press any key to continue\n");
+            fflush(stdin);
+            getchar();
+            return cart;
+        }
+    }
+
+
     return cart;
 }

sorting.h

@@ -1,7 +1,7 @@
 typedef struct Map{
     int key;
     void* value;
-};
+}Map;
 
 int compare_decending(const void *a, const void *b){
     return (*(struct Map *)b).value - (*(struct Map *)a).value;