sba/role_control.h

//role control
void add_role();
void list_role();
void print_role(struct linkedlist* list,int cur,int end,struct Map* map);
void showRole(struct linkedlist* list,int index);
struct Map* sortRole(struct linkedlist* list,int choice);

void role_control(){
    int choice = -1;
    struct user db = read_db_user();
    do{
        char * items[] = {
        	"add admin role",
        	"list role"
		};
        choice = choices_selecter(items,2,"><Welcome to the Student Union POS system><\nRole control");
        switch (choice){
            case 0:
                break;
            case 1:
                add_role();
                break;
            case 2:
                char * SortItems[] = {
                    "admin",
                    "role",
                };
                void * list = getLinkedList(role_list_db(),0);
                // lister(list,NULL,sizeofLinkedlist(list),"Role",SortItems,2,print_role,sortRole,showRole);
                list_role(db);
                break;
            default:
                break;
        }
    }while(choice != 0);
}


void add_role(){
    char role[100];
    printf("Enter Admin role name: ");
    fflush_stdin();
    scanf("%s", role);
    if(is_admin(role)){//check if role exist in admin file
        printf("Admin role already exist\n");
        printf("press any key to continue\n");
        fflush_stdin();
        getchar();
    }else{
        add_admin(role);
        printf("role added\n");
        printf("press any key to continue\n");
        fflush_stdin();
        getchar();
    }
    return;
}



void list_role(){
    struct linkedlist* list = getLinkedList(role_list_db(),0);
    int list_size = sizeofLinkedlist(list);
    int choice = -1;
    int page = 0;
    int page_size = PAGE_SIZE;
    int total_pages = ceil( (double)list_size / page_size);
    struct Map* map = NULL;    
    //list role
    do{
        Cls();
        welcome_message();
        printf("Role list\n");
        printf("0 exit\n");
        printf("1 sort admin ascending\n");
        printf("2 sort admin descending\n");
        printf("3 sort role ascending\n");
        printf("4 sort role descending\n");
        if(page+1 == total_pages){
            print_role(list,page*page_size,list_size,map);
        }else{
            print_role(list,page*page_size,(page+1)*page_size,map);
        }
        //page control
        int current_page_size = page_size+2;
        if(page+1 == total_pages){
            current_page_size = list_size - page*page_size + 4;
        }
        printf("%d next page\n",current_page_size+1);
        printf("%d previous page\n",current_page_size+2);
        printf("%d set page size\n",current_page_size+3);
        printf("%d/%d/%d(page size/page number/total)\n",page_size,page+1,total_pages);

        bool valid = true;
        do{
            valid = true;
            printf("Please input your choice\n>");
            fflush_stdin();
            scanf("%d", &choice);
            if(choice <=4 && choice > 0){
                printf("sorting...\n");
                map = sortRole(list,choice);
            }else if(choice == current_page_size+1){
                if(page + 1 < total_pages){
                page++;
                }else{
                    printf("Already at last page\n");
                    valid = false;
                }
            }else if(choice == current_page_size+2){
                if(page > 0){
                    page--; 
                }else{
                    printf("Already at first page\n");
                    valid = false;
                }
            }else if(choice == current_page_size+3){
                printf("Enter page size: ");
                fflush_stdin();
                scanf("%d", &page_size);
                total_pages = ceil( (double)list_size / page_size);
                page = 0;

            }else if(choice >= 5 && choice <= current_page_size){
                if(map == NULL){
                    showRole(list,choice - 5 + page_size*page);
                }else{
                    showRole(list,map[choice - 5 + page_size*page].key);
                }
            }else if(choice != 0){
                printf("Invalid choice\n");
                valid = false;
            }
        }while(!valid);
    }while(choice != 0);
}

void print_role(struct linkedlist* list,int cur,int end,struct Map* map){
    printf("%-10s%-10s%-10s\n","No.","Role","Admin?");
    if(map == NULL){
        for(int i = cur; i < end; i++){
            list = getLinkedList(list,i);
            char* name = list->data;
            printf("%-10d%-10s%-10s\n",i-cur + 5,name,is_admin(name)?"T":"F");
        }
    }else{
        for(int i = cur; i < end; i++){
            list = getLinkedList(list,map[i].key);
            char* name = list->data;
            printf("%-10d%-10s%-10s\n",i-cur + 5,name,is_admin(name)?"T":"F");
        }
    }
}

void showRole(struct linkedlist* list,int index){
    int choice;
    list = getLinkedList(list,index);
    do{
    char* name = list->data;
    printf("%-10s%-10s\n","Role","Admin?");
    printf("%-10s%-10s\n",name,is_admin(name)?"T":"F");
    printf("1 toogle admin\n");
    printf("2 exit\n");
    bool valid = true;
    do{
        valid = true;
        printf("Please input your choice\n>");
        fflush_stdin();
        scanf("%d", &choice);
        if(choice == 1){
            if(is_admin(name)){
                remove_admin(name);
            }else{
                add_admin(name);
            }
            printf("Admin role toggled\n");
            printf("Press any key to continue\n");
            fflush_stdin();
            getchar();
        }else if(choice != 2){
            printf("Invalid choice\n");
            valid = false;
        }
    }while(!valid);
    }while(choice != 2);
    return;
}


struct Map* sortRole(struct linkedlist* list,int choice){
    struct Map* map = malloc(sizeof(struct Map)*sizeofLinkedlist(list));
    struct linkedlist* cur = getLinkedList(list,0);
    for(int i = 0; i < sizeofLinkedlist(list); i++){
        switch(choice){
            case 1:
            case 2:
                map[i].key = i;
                bool temp = !is_admin(cur->data);
                bool* tempstar = malloc(sizeof(bool));
                *tempstar = temp;
                map[i].value = tempstar;
                break;
            case 3:
            case 4:
                map[i].key = i;
                map[i].value = cur->data;
                break;
        }
        cur = cur->next;
    }
    switch(choice){
        case 1:
        case 3:
            qsort(map,sizeofLinkedlist(list),sizeof(struct Map),compare_decending_str);
            break;
        case 2:
        case 4:
            qsort(map,sizeofLinkedlist(list),sizeof(struct Map),compare_ascending_str);
            break;
    }
    return map;
}