From fcbd309c69a895c6200bc5854c3ae4a2068ee78f Mon Sep 17 00:00:00 2001
From: smarttommyau <smarttommyau@gmail.com>
Date: Sat, 27 Aug 2022 17:33:07 +0800
Subject: [PATCH] list_item_first_bui;d test

---
 .gitignore              |   1 +
 admin_user.h            |  16 +-
 data_file_inventory.txt |   2 +-
 database.h              | 393 +++++++++++++++++++++++++++++++++++-----
 dateNtime.h             |   1 +
 filecontrol.h           |   1 +
 main.c                  |   1 +
 menu.h                  |   1 +
 normal_user.h           | 192 +++++++++++++++++++-
 sorting.h               |  11 ++
 10 files changed, 568 insertions(+), 51 deletions(-)
 create mode 100644 .gitignore
 create mode 100644 sorting.h

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..5f4ebb8
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+main.exe
diff --git a/admin_user.h b/admin_user.h
index 95e5890..3d27ee6 100644
--- a/admin_user.h
+++ b/admin_user.h
@@ -5,4 +5,18 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
-#endif
\ No newline at end of file
+#include<math.h>
+#endif
+
+#ifndef MENU_H
+#define MENU_H
+#include "menu.h"
+#endif //MENU_H
+
+bool admin_menu(){
+    system("cls");
+    welcome_message();
+    
+    
+    return true;
+}
\ No newline at end of file
diff --git a/data_file_inventory.txt b/data_file_inventory.txt
index 6c26fe7..b219055 100644
--- a/data_file_inventory.txt
+++ b/data_file_inventory.txt
@@ -1,4 +1,4 @@
-#category, brand, product, price, cost, stock, barcode
+#category, brand, product, price, stock, barcode
 Test
 Testing Co Ltd
 Testing Product
diff --git a/database.h b/database.h
index 94bb8bb..3deade3 100644
--- a/database.h
+++ b/database.h
@@ -5,18 +5,20 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
+#include<math.h>
 #endif
 #ifndef DNT_H
 #define DNT_H
 #include "dateNtime.h"
 #endif // !DNT_H
 typedef struct basic_db{
-    FILE *fp;
     int row_count;
+    bool init_status;
     //array of struct of row
 };
 
 //inventory
+#define INVENTORY_DB "data_file_inventory.txt"
 typedef struct inventory{
     struct basic_db db;
     struct inventory_row* row;
@@ -27,15 +29,16 @@ typedef struct inventory_row{
     char band[100];
     char product[100];
     double price;
-    double cost;
     int stock;
     long barcode;
+    bool isdeleted;//common for all rows,default is false
 };
-typedef enum INVENTORY {
-    category = 1, brand = 2, product = 3, price = 4, cost =  5, stock = 6 , barcode = 7
- };
-
+typedef enum  {
+    category = 1, brand = 2, product = 3, price_inv = 4, stock = 5, barcode_inv = 6
+ }INVENTORY;
+#define ENDOFINVENTORY 6
 //transaction
+#define TRANSACTION_DB "data_file_transaction.txt"
 typedef struct transaction{
     struct basic_db db;
     struct transaction_row* row;
@@ -48,12 +51,14 @@ typedef struct transaction_row{
     double price;
     int quantity;
     long barcode;
+    bool isdeleted;//common for all rows,default is false
 };
-typedef enum TRANSACTION {
-    date = 1, time = 2, id = 3, price = 5, quantity = 4, barcode = 7
- };
-
+typedef enum {
+    date = 1, time = 2, id_tran = 3, price_tran = 5, quantity = 4, barcode_tran = 7
+ }TRANSACTION;
+#define ENDOFTRANSACTION 7
 //user
+#define USER_DB "data_file_user.txt"
 typedef struct user{
     struct basic_db db;
     struct user_row* row;
@@ -63,50 +68,344 @@ typedef struct user_row{
     char role[100];
     long id;
     bool isAdmin;
+    bool isdeleted;//common for all rows,default is false
 };
 
-typedef  enum USER {
-    name = 1, role = 2,id = 3
- };
-
-
+typedef enum {
+    name = 1, role = 2, id_user = 3
+ }USER;
+#define ENDOFUSER 3
 
 
 
+//TODOLwrite function for these functions
 //list of db func
-bool read_db_invt(FILE* fp,enum INVENTORY inventory){
+int basic_get_row_count(int end, FILE *fp){
+    fseek(fp, 0, SEEK_SET);//prevent pointer on wrong position
+    //get row count
+    int row_count = 0;
+    int colmun_count = 0;
+    while(!feof(fp)&&!ferror(fp)){
+        char buffer[100];
+        fgets(buffer, sizeof(buffer),fp);
+        if(buffer[0] == '#'){//catch comment line and ignore
+            continue;
+        }
+        colmun_count++;
+        if(colmun_count == end){
+            row_count++;
+            colmun_count = 0;
+        }
+    }
+}
+
+struct inventory read_db_invt(){//please open file in read mode
+    FILE* fp = fopen(INVENTORY_DB, "r");
+    struct inventory db;
+    
+    //gets the number of rows in the file
+    int row_count = basic_get_row_count(ENDOFINVENTORY,fp);
+    db.row = (struct inventory_row*)malloc(row_count * sizeof(struct inventory_row));
+    db.db.row_count = row_count;
+
+    fseek(fp,0,SEEK_SET);//reset fp to the beginning of the file
+
+    //read data
+    for(int i=0;i<row_count;i++){
+        db.row[i].isdeleted = false;
+        for(INVENTORY j=category;j<ENDOFINVENTORY;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{
+                switch(j){
+                    case category:
+                        strcpy(db.row[i].category,buffer);
+                        break;
+                    case brand:
+                        strcpy(db.row[i].band,buffer);
+                        break;
+                    case product:
+                        strcpy(db.row[i].product,buffer);
+                        break;
+                    case price_inv:
+                        db.row[i].price = atof(buffer);
+                        break;
+                    case stock:
+                        db.row[i].stock = atoi(buffer);
+                        break;
+                    case barcode_inv:
+                        db.row[i].barcode = atol(buffer);
+                        break;
+                    
+                }
+            }
+            
+        }
+    }
+    if(ferror(fp)){
+        printf("Error in reading file\n");
+        db.db.init_status = false;
+        return db;
+    }
+    fclose(fp);
+    db.db.init_status = true;
+    return db;
+
+
+}
+struct transaction read_db_tran(){
+    FILE* fp = fopen(TRANSACTION_DB, "r");
+    struct transaction db;
+
+    //gets the number of rows in the file
+    int row_count = basic_get_row_count(ENDOFTRANSACTION,fp);
+    db.row = (struct transaction_row*)malloc(row_count * sizeof(struct transaction_row));
+    db.db.row_count = row_count;
+
+    fseek(fp,0,SEEK_SET);//reset fp to the beginning of the file
+
+    //read data
+    for(int i=0;i<row_count;i++){
+        db.row[i].isdeleted = false;
+        for(TRANSACTION j=date;j<ENDOFTRANSACTION;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{
+                switch(j){
+                    case date:
+                        db.row[i].date = convert_to_date(buffer);
+                        break;
+                    case time:
+                        db.row[i].time = convert_to_time(buffer);
+                        break;
+                    case id_tran:
+                        db.row[i].id = atol(buffer);
+                        break;
+                    case price_tran:
+                        db.row[i].price = atof(buffer);
+                        break;
+                    case quantity:
+                        db.row[i].quantity = atoi(buffer);
+                        break;
+                    case barcode_tran:
+                        db.row[i].barcode = atol(buffer);
+                        break;   
+                }
+            }
+            
+        }
+    }
+    if(ferror(fp)){
+        printf("Error in reading file\n");
+        db.db.init_status = false;
+        return db;
+    }
+    fclose(fp);
+    db.db.init_status = true;
+    return db;
+}
+struct user read_db_user(){
+    FILE* fp = fopen(USER_DB,"r");
+    struct user db;
+
+    //gets the number of rows in the file
+    int row_count = basic_get_row_count(ENDOFUSER,fp);
+    db.row = (struct user_row*)malloc(row_count * sizeof(struct user_row));
+    db.db.row_count = row_count;
+
+    fseek(fp,0,SEEK_SET);//reset fp to the beginning of the file
+
+    //read data
+    for(int i=0;i<row_count;i++){
+        db.row[i].isdeleted = false;
+        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{
+                switch(j){
+                    case name:
+                        strcpy(db.row[i].name,buffer);
+                        break;
+                    case role:
+                        strcpy(db.row[i].role,buffer);
+                        break;
+                    case id_user:
+                        db.row[i].id = atol(buffer);
+                        break;
+                }
+            }
+            
+        }
+    }
+    if(ferror(fp)){
+        printf("Error in reading file\n");
+        db.db.init_status = false;
+        return db;
+    }
+    fclose(fp);
+    db.db.init_status = true;
+    return db;
+}
+
+bool update_db_invt(struct inventory* invt){
+    FILE* fpR = fopen(INVENTORY_DB,"r");
+    char temp[30] = INVENTORY_DB;
+    strcat(temp,".temp");
+    FILE* fpW = fopen(temp,"w");
+    if(fpR == NULL || fpW == NULL){
+        printf("Error in opening file\n");
+        return false;
+    }
+    for(int i=0;i<invt->db.row_count;i++){
+        if(invt->row[i].isdeleted == true){
+            continue;
+        }
+        for(INVENTORY j=category;j<ENDOFINVENTORY;j++){
+            char buffer[100];
+            do{
+                if(feof(fpR)){
+                    break;
+                }
+                fgets(buffer, sizeof(buffer),fpR);
+                if(buffer[0] == '#'){//catch comment line and print back to new file
+                    fputs(buffer,fpW);
+                }
+            }while(buffer[0] == '#');
+            switch(j){
+                case category:
+                    fprintf(fpW,"%s",invt->row[i].category);
+                    break;
+                case brand:
+                    fprintf(fpW,"%s",invt->row[i].band);
+                    break;
+                case product:
+                    fprintf(fpW,"%s",invt->row[i].product);
+                    break;
+                case price_inv:
+                    fprintf(fpW,"%f",invt->row[i].price);
+                    break;
+                case stock:
+                    fprintf(fpW,"%d",invt->row[i].stock);
+                    break;
+                case barcode_inv:
+                    fprintf(fpW,"%ld",invt->row[i].barcode);
+                    break;
+            }
+            fprintf(fpW,"\n");
+        }
+    }
+    //close file and replace old file with new file
+    fclose(fpR);
+    fclose(fpW);
+    remove(INVENTORY_DB);
+    rename(temp,INVENTORY_DB);
+    return true;
+    
+}
+
+bool update_db_tran(struct transaction* tran){
+    FILE* fpR = fopen(TRANSACTION_DB,"r");
+    char temp[30] = TRANSACTION_DB;
+    strcat(temp,".temp");
+    FILE* fpW = fopen(temp,"w");
+    if(fpR == NULL || fpW == NULL){
+        printf("Error in opening file\n");
+        return false;
+    }
+    for(int i=0;i<tran->db.row_count;i++){
+        if(tran->row[i].isdeleted == true){
+            continue;
+        }
+        for(TRANSACTION j=date;j<ENDOFTRANSACTION;j++){
+            char buffer[100];
+            do{
+                if(feof(fpR)){
+                    break;
+                }
+                fgets(buffer, sizeof(buffer),fpR);
+                if(buffer[0] == '#'){//catch comment line and print back to new file
+                    fputs(buffer,fpW);
+                }
+            }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);
+                    break;
+                case time:
+                    fprintf(fpW,"%d:%d:%d",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);
+                    break;
+                case price_tran:
+                    fprintf(fpW,"%f",tran->row[i].price);
+                    break;
+                case quantity:
+                    fprintf(fpW,"%d",tran->row[i].quantity);
+                    break;
+                case barcode_tran:
+                    fprintf(fpW,"%ld",tran->row[i].barcode);
+                    break;
+            }
+            fprintf(fpW,"\n");
+        }
+    }
+    //close file and replace old file with new file
+    fclose(fpR);
+    fclose(fpW);
+    remove(TRANSACTION_DB);
+    rename(temp,TRANSACTION_DB);
     return true;
 }
-bool read_db_tran(FILE* fp,enum TRANSACTION transaction){
-    return true;
-}
-bool read_db_user(FILE* fp,enum USER user){
-    return true;
-}
-bool new_db_invt(FILE* fp,enum INVENTORY inventory){
-    return true;
-}
-bool new_db_tran(FILE* fp,enum TRANSACTION transaction){
-    return true;
-}
-bool new_db_user(FILE* fp,enum USER user){
-    return true;
-}
-bool edit_db_invt(FILE* fp,enum INVENTORY inventory){
-    return true;
-}
-bool edit_db_tran(FILE* fp,enum TRANSACTION transaction){
-    return true;
-}
-bool edit_db_user(FILE* fp,enum USER user){
-    return true;
-}
-bool rm_db_invt(FILE* fp,enum INVENTORY inventory){
-    return true;
-}
-bool rm_db_tran(FILE* fp,enum TRANSACTION transaction){
-    return true;
-}
-bool rm_db_user(FILE* fp,enum USER user){
+
+bool update_db_user(struct user* user){
+    FILE* fpR = fopen(USER_DB,"r");
+    char temp[30] = USER_DB;
+    strcat(temp,".temp");
+    FILE* fpW = fopen(temp,"w");
+    if(fpR == NULL || fpW == NULL){
+        printf("Error in opening file\n");
+        return false;
+    }
+    for(int i=0;i<user->db.row_count;i++){
+        if(user->row[i].isdeleted == true){
+            continue;
+        }
+        for(USER j=name;j<ENDOFUSER;j++){
+            char buffer[100];
+            do{
+                if(feof(fpR)){
+                    break;
+                }
+                fgets(buffer, sizeof(buffer),fpR);
+                if(buffer[0] == '#'){//catch comment line and print back to new file
+                    fputs(buffer,fpW);
+                }
+            }while(buffer[0] == '#');
+            switch(j){
+                case name:
+                    fprintf(fpW,"%s",user->row[i].name);
+                    break;
+                case role:
+                    fprintf(fpW,"%s",user->row[i].role);
+                    break;
+                case id_user:
+                    fprintf(fpW,"%ld",user->row[i].id);
+                    break;
+            }
+            fprintf(fpW,"\n");
+        }
+    }
+    //close file and replace old file with new file
+    fclose(fpR);
+    fclose(fpW);
+    remove(USER_DB);
+    rename(temp,USER_DB);
     return true;
 }
\ No newline at end of file
diff --git a/dateNtime.h b/dateNtime.h
index cb2a10c..a97a04c 100644
--- a/dateNtime.h
+++ b/dateNtime.h
@@ -5,6 +5,7 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
+#include<math.h>
 #endif
 //DATE
 typedef struct date{
diff --git a/filecontrol.h b/filecontrol.h
index 53b4675..d6f5644 100644
--- a/filecontrol.h
+++ b/filecontrol.h
@@ -5,4 +5,5 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
+#include<math.h>
 #endif
diff --git a/main.c b/main.c
index 1ab985b..268ea13 100644
--- a/main.c
+++ b/main.c
@@ -5,6 +5,7 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
+#include<math.h>
 #endif
 #ifndef CUSTOM_H
 #define CUSTOM_H
diff --git a/menu.h b/menu.h
index 1cb33e1..27cf4f3 100644
--- a/menu.h
+++ b/menu.h
@@ -5,6 +5,7 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
+#include<math.h>
 #endif
 
 
diff --git a/normal_user.h b/normal_user.h
index fe2826d..0771344 100644
--- a/normal_user.h
+++ b/normal_user.h
@@ -5,6 +5,7 @@
 #include<stdlib.h>
 #include<string.h>
 #include<stdbool.h>
+#include<math.h>
 #endif
 
 #ifndef MENU_H
@@ -12,9 +13,196 @@
 #include "menu.h"
 #endif //MENU_H
 
+#ifndef SORT_H
+#define SORT_H
+#include "sorting.h"
+#endif // !SORT_H
+#define PAGE_SIZE 20
+
+//for sort list
+void list_items();
+int normal_menu_user_choices();
 bool normal_menu(){
+    system("cls");
+    welcome_message();
+    //the selection menu
+    int choice = normal_menu_user_choices();
+
+    switch (choice)
+    {
+        case 1://List items
+            list_items();
+            break;
+        case 2://Search item
+            // search_item();
+            break;
+        case 3://scan barcode
+            // scan_barcode();
+            break;
+        case 4://Exit
+            return false;
+            break;
+        default://invalid input 
+            printf("Invalid choice\n");
+            return false;
+            break;
+    }
+
+    return true;
+}
+
+
+int normal_menu_user_choices(){
+    int choice;
+    printf("You can buy items inside the 2 option below\n");
+    printf("1. List items\n");
+    printf("2. Search item\n");
+    printf("3. Scan Barcodes\n");
+    printf("4. Exit\n");
+    printf("Enter your choice: ");
+    scanf("%d", &choice);
+    return choice;
+}
+
+//list items
+void show_item(struct inventory db,int index);
+void print_page(struct inventory db, int cur, int end,struct Map* map);
+struct Map* sortItems(struct inventory db, int sort);
+void list_items(){
+    system("cls");
+    welcome_message();
+    //get the list of items from the database
+    //print the list of items
+    //prompt user to select an item
+    //if user selects an item, display the item's details
+    int choice = -1;
+    int page = 0;
+    int page_size = PAGE_SIZE;
+    struct inventory db = read_db_invt();
+    int total_pages = ceil(db.db.row_count / page_size);
+    struct Map* map = NULL;
+
+
+    do{
+
+    //ooptions
+    system("cls");
+    printf("0 exit\n");
+    printf("1 sort name decending\n");
+    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("6 sort band ascending\n");
+    printf("7 sort category decending\n");
+    printf("8 sort category ascending\n");
+    printf("List of items:\n");
+
+    //print items
+    if(map == NULL){
+        print_page(db, page * page_size, (page + 1== total_pages)?db.db.row_count:(page+1) * page_size,(struct Map*)NULL);
+    }else{//sorted)
+        print_page(db, page * page_size, (page + 1== total_pages)?db.db.row_count:(page+1) * page_size,map);
+    }
+
+    //page control
+    printf("%d next page\n", page_size+3);
+    printf("%d previous page\n", page_size+4);
+    printf("%d set page size\n", page_size+5);
+    printf("%D/%d/%d(page size/page number/total)\n",page_size, page+1,total_pages);
+
+    //prompt user to select an item
+    bool valid = true; 
+    do{
+        printf("Enter your choice: ");
+        scanf("%d", &choice);
+        if(choice <=8 && choice > 0){
+            printf("sorting...\n");
+            map = sortItems(db,choice);
+        }else if(choice == page_size+3){
+            page++;
+        }else if(choice == page_size+4 && page > 0){
+            page--;
+        }else if(choice == page_size+5){
+            printf("Enter page size: ");
+            scanf("%d", &page_size);
+            total_pages = ceil(db.db.row_count / page_size);
+        }else if(choice >= 0 && choice < db.db.row_count){
+            show_item(db,choice-9 + page_size*page);   
+        }else{
+            printf("Invalid choice\n");
+            valid = false;
+        }
+    }while(!valid);
+
+    }while(choice != 0);
+}
+struct Map* sortItems(struct inventory db, int sort){
+    struct Map *map = malloc(sizeof(struct Map) * db.db.row_count);
+    for (int i = 0; i < db.db.row_count; i++){
+        map[i].key = i;
+        switch(sort){
+            case 1:
+            case 2:
+                map[i].value = (int)db.row[i].product;
+                break;
+
+            case 3:
+            case 4:
+                map[i].value = (int)db.row[i].price*100;//presume there is no price contain  0.001
+                break;
+            case 5:
+            case 6:
+                map[i].value = (int)db.row[i].band;
+                break;
+            case 7:
+            case 8:
+                map[i].value = (int)db.row[i].category;
+                break;
+        }
+    }
+    switch (sort){
+        case 1:
+        case 3:
+        case 5:
+        case 7:
+            qsort(map, db.db.row_count, sizeof(struct Map), compare_decending);
+            break;
+        case 2:
+        case 4:
+        case 6:
+        case 8:
+            qsort(map, db.db.row_count, sizeof(struct Map), compare_ascending);
+            break;
+    }
+    return map;
+}
+
+void print_page(struct inventory db, int cur, int end,struct Map* map){
+    for (int i = cur; i < end; i++)
+    {
+        if(map != NULL){
+            printf("%d. %s\n", i + 1, db.row[map[i].key].product);
+        }
+        else{
+            printf("item%d. %s\n", i + 3, db.row[i].product);
+        }
+    }
+}
+
+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("Band: %d\n", db.row[index].band);
+    printf("Price: $%lf\n", db.row[index].price);
+    printf("Stock: %d\n", db.row[index].stock);
+    printf("Barcode: %ld\n",db.row[index].barcode);
+
+    return;
+}
 
 
 
-    retrurn true
-}
\ No newline at end of file
+//
+
diff --git a/sorting.h b/sorting.h
new file mode 100644
index 0000000..7a2234d
--- /dev/null
+++ b/sorting.h
@@ -0,0 +1,11 @@
+typedef struct Map{
+    int key;
+    int value;
+};
+
+int compare_decending(const void *a, const void *b){
+    return (*(struct Map *)b).value - (*(struct Map *)a).value;
+}
+int compare_ascending(const void *a, const void *b){
+    return (*(struct Map *)a).value - (*(struct Map *)b).value;
+}
\ No newline at end of file