feat: add database schema and seed data for Library Management System

Database/Models/Book.cs

@@ -20,8 +20,6 @@ public partial class Book
     public DateTime CreatedAt { get; set; }
 
     public string? Description { get; set; }
-
-    public string? CoverUrl { get; set; }
     
     public int TotalCopies { get; set; }
     

Database/Models/LibraryManagementContext.cs

@@ -29,10 +29,6 @@ public partial class LibraryManagementContext : DbContext
 
     public virtual DbSet<Wishlist> Wishlists { get; set; }
 
-    protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-#warning To protect potentially sensitive information in your connection string, you should move it out of source code. You can avoid scaffolding the connection string by using the Name= syntax to read it from configuration - see https://go.microsoft.com/fwlink/?linkid=2131148. For more guidance on storing connection strings, see https://go.microsoft.com/fwlink/?LinkId=723263.
-        => optionsBuilder.UseSqlServer("Server=DESKTOP-BP9A061;Database=LibraryManagement;User Id=sa;Password=sasa@123;TrustServerCertificate=True;");
-
     protected override void OnModelCreating(ModelBuilder modelBuilder)
     {
         modelBuilder.Entity<Book>(entity =>

Database/db.sql

@@ -0,0 +1,111 @@
+-- Library Management System Database Schema (MSSQL)
+CREATE DATABASE LibraryManagement;
+GO
+
+USE LibraryManagement;
+GO
+
+-- 1. Categories Table
+CREATE TABLE Categories (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    Name NVARCHAR(100) NOT NULL,
+    CONSTRAINT UQ_Categories_Name UNIQUE (Name)
+);
+GO
+
+-- 2. Books Table
+CREATE TABLE Books (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    Title NVARCHAR(200) NOT NULL,
+    ISBN NVARCHAR(20) NOT NULL,
+    Author NVARCHAR(100) NOT NULL,
+    Status NVARCHAR(20) NOT NULL DEFAULT 'Available',
+    IsActive BIT NOT NULL DEFAULT 1,
+    CreatedAt DATETIME NOT NULL DEFAULT (GETDATE()),
+    Description NVARCHAR(MAX) NULL,
+    TotalCopies INT NOT NULL DEFAULT 1,
+    AvailableCopies INT NOT NULL DEFAULT 1,
+    UpdatedAt DATETIME NULL,
+    CONSTRAINT UQ_Books_ISBN UNIQUE (ISBN)
+);
+GO
+
+-- 3. Users Table
+CREATE TABLE Users (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    FullName NVARCHAR(100) NOT NULL,
+    Email NVARCHAR(100) NOT NULL,
+    PasswordHash NVARCHAR(MAX) NOT NULL,
+    PhoneNumber NVARCHAR(20) NULL,
+    Role NVARCHAR(20) NOT NULL DEFAULT 'Member',
+    IsActive BIT NOT NULL DEFAULT 1,
+    CreatedAt DATETIME NOT NULL DEFAULT (GETDATE()),
+    UpdatedAt DATETIME NULL,
+    StudentId NVARCHAR(20) NULL,
+    BanStatus BIT NULL,
+    SuspensionEndDate DATETIME NULL,
+    Address NVARCHAR(255) NULL,
+    CONSTRAINT UQ_Users_Email UNIQUE (Email)
+);
+GO
+
+-- 4. Memberships Table
+CREATE TABLE Memberships (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    Type NVARCHAR(50) NOT NULL,
+    MaxBooks INT NOT NULL,
+    BorrowingDays INT NOT NULL,
+    Price DECIMAL(10, 2) NOT NULL,
+    DurationMonths INT NOT NULL,
+    CONSTRAINT IX_Memberships_Type UNIQUE (Type)
+);
+GO
+
+-- 5. BookCategories (Many-to-Many Join Table)
+CREATE TABLE BookCategories (
+    BookId INT NOT NULL,
+    CategoryId INT NOT NULL,
+    CONSTRAINT PK_BookCategories PRIMARY KEY (BookId, CategoryId),
+    CONSTRAINT FK_BookCategories_Books FOREIGN KEY (BookId) REFERENCES Books(Id) ON DELETE CASCADE,
+    CONSTRAINT FK_BookCategories_Categories FOREIGN KEY (CategoryId) REFERENCES Categories(Id) ON DELETE CASCADE
+);
+GO
+
+-- 6. Borrowings Table
+CREATE TABLE Borrowings (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    UserId INT NOT NULL,
+    BookId INT NOT NULL,
+    BorrowDate DATETIME NOT NULL DEFAULT (GETDATE()),
+    DueDate DATETIME NOT NULL,
+    ReturnDate DATETIME NULL,
+    Status NVARCHAR(20) NOT NULL DEFAULT 'Active',
+    FineAmount DECIMAL(10, 2) NOT NULL DEFAULT 0.00,
+    IsFinePaid BIT NOT NULL DEFAULT 0,
+    CONSTRAINT FK_Borrowings_Users FOREIGN KEY (UserId) REFERENCES Users(Id),
+    CONSTRAINT FK_Borrowings_Books FOREIGN KEY (BookId) REFERENCES Books(Id)
+);
+GO
+
+-- 7. UserSubscriptions Table
+CREATE TABLE UserSubscriptions (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    UserId INT NOT NULL,
+    MembershipId INT NOT NULL,
+    StartDate DATETIME NOT NULL,
+    ExpiryDate DATETIME NOT NULL,
+    IsActive BIT NOT NULL DEFAULT 1,
+    CONSTRAINT FK_UserSubscriptions_Users FOREIGN KEY (UserId) REFERENCES Users(Id),
+    CONSTRAINT FK_UserSubscriptions_Memberships FOREIGN KEY (MembershipId) REFERENCES Memberships(Id)
+);
+GO
+
+-- 8. Wishlists Table
+CREATE TABLE Wishlists (
+    Id INT IDENTITY(1,1) PRIMARY KEY,
+    UserId INT NOT NULL,
+    BookId INT NOT NULL,
+    CONSTRAINT FK_Wishlists_Users FOREIGN KEY (UserId) REFERENCES Users(Id),
+    CONSTRAINT FK_Wishlists_Books FOREIGN KEY (BookId) REFERENCES Books(Id)
+);
+GO

Database/seed_data.sql

@@ -0,0 +1,86 @@
+-- Seed Data for Library Management System
+USE LibraryManagement;
+GO
+
+-- 1. Insert Categories
+SET IDENTITY_INSERT Categories ON;
+INSERT INTO Categories (Id, Name) VALUES 
+(1, 'Fiction'),
+(2, 'Science'),
+(3, 'History'),
+(4, 'Biography'),
+(5, 'Technology'),
+(6, 'Philosophy'),
+(7, 'Self-Help'),
+(8, 'Fantasy'),
+(9, 'Mystery'),
+(10, 'Business');
+SET IDENTITY_INSERT Categories OFF;
+GO
+
+-- 2. Insert Memberships
+SET IDENTITY_INSERT Memberships ON;
+INSERT INTO Memberships (Id, Type, MaxBooks, BorrowingDays, Price, DurationMonths) VALUES 
+(1, 'Basic', 2, 7, 10.00, 1),
+(2, 'Standard', 5, 14, 25.00, 3),
+(3, 'Premium', 10, 30, 80.00, 12),
+(4, 'Student', 3, 15, 15.00, 6);
+SET IDENTITY_INSERT Memberships OFF;
+GO
+
+-- 3. Insert Users (Password is 'Password123' hashed typically, but using placeholder for SQL)
+SET IDENTITY_INSERT Users ON;
+INSERT INTO Users (Id, FullName, Email, PasswordHash, PhoneNumber, Role, IsActive, CreatedAt, Address) VALUES 
+(1, 'Admin User', 'admin@library.com', 'AQAAAAEAACcQAAAAE...', '09123456789', 'Admin', 1, GETDATE(), '123 Main St, Central City'),
+(2, 'John Doe', 'john.doe@gmail.com', 'AQAAAAEAACcQAAAAE...', '09234567890', 'Member', 1, GETDATE(), '456 Oak Ave, North Side'),
+(3, 'Jane Smith', 'jane.smith@yahoo.com', 'AQAAAAEAACcQAAAAE...', '09345678901', 'Member', 1, GETDATE(), '789 Pine Rd, South Village'),
+(4, 'David Wilson', 'david.w@university.edu', 'AQAAAAEAACcQAAAAE...', '09456789012', 'Member', 1, GETDATE(), '101 University Dr, Campus'),
+(5, 'Sarah Miller', 'sarah.m@gmail.com', 'AQAAAAEAACcQAAAAE...', '09567890123', 'Member', 1, GETDATE(), '202 Lake View, West Coast');
+SET IDENTITY_INSERT Users OFF;
+GO
+
+-- 4. Insert Books
+SET IDENTITY_INSERT Books ON;
+INSERT INTO Books (Id, Title, ISBN, Author, Status, IsActive, CreatedAt, Description, TotalCopies, AvailableCopies) VALUES 
+(1, 'The Great Gatsby', '9780743273565', 'F. Scott Fitzgerald', 'Available', 1, GETDATE(), 'A classic novel of the Jazz Age.', 5, 5),
+(2, 'A Brief History of Time', '9780553380163', 'Stephen Hawking', 'Available', 1, GETDATE(), 'Exploring the origin and fate of the universe.', 3, 3),
+(3, 'Steve Jobs', '9781451648539', 'Walter Isaacson', 'Available', 1, GETDATE(), 'The exclusive biography of Steve Jobs.', 2, 2),
+(4, 'The Pragmatic Programmer', '9780135957059', 'Andrew Hunt', 'Available', 1, GETDATE(), 'Your journey to mastery in software development.', 4, 4),
+(5, 'Sapiens', '9780062316097', 'Yuval Noah Harari', 'Available', 1, GETDATE(), 'A brief history of humankind.', 6, 6),
+(6, 'The Hobbit', '9780547928227', 'J.R.R. Tolkien', 'Available', 1, GETDATE(), 'A prelude to The Lord of the Rings.', 8, 8),
+(7, 'Atomic Habits', '9780735211292', 'James Clear', 'Available', 1, GETDATE(), 'An easy & proven way to build good habits.', 10, 10),
+(8, 'The Da Vinci Code', '9780307474278', 'Dan Brown', 'Available', 1, GETDATE(), 'A murder in the Louvre leads to a complex mystery.', 5, 5),
+(9, 'Lean In', '9780385349949', 'Sheryl Sandberg', 'Available', 1, GETDATE(), 'Women, work, and the will to lead.', 3, 3),
+(10, 'Clean Code', '9780132350884', 'Robert C. Martin', 'Available', 1, GETDATE(), 'A handbook of agile software craftsmanship.', 4, 4);
+SET IDENTITY_INSERT Books OFF;
+GO
+
+-- 5. Book-Category Mapping
+INSERT INTO BookCategories (BookId, CategoryId) VALUES 
+(1, 1), -- Great Gatsby - Fiction
+(2, 2), -- Brief History - Science
+(3, 4), -- Steve Jobs - Biography
+(4, 5), -- Pragmatic Programmer - Technology
+(5, 3), -- Sapiens - History
+(6, 8), -- Hobbit - Fantasy
+(7, 7), -- Atomic Habits - Self-Help
+(8, 9), -- Da Vinci Code - Mystery
+(9, 10), -- Lean In - Business
+(10, 5); -- Clean Code - Technology
+GO
+
+-- 6. User Subscriptions
+INSERT INTO UserSubscriptions (UserId, MembershipId, StartDate, ExpiryDate, IsActive) VALUES 
+(2, 2, '2026-01-01', '2026-04-01', 1),
+(3, 3, '2026-01-01', '2027-01-01', 1),
+(4, 4, '2026-02-15', '2026-08-15', 1),
+(5, 1, '2026-04-01', '2026-05-01', 1);
+GO
+
+-- 7. Some Borrowing History
+INSERT INTO Borrowings (UserId, BookId, BorrowDate, DueDate, ReturnDate, Status) VALUES 
+(2, 1, '2026-04-10', '2026-04-24', '2026-04-15', 'Returned'),
+(2, 4, '2026-04-16', '2026-04-30', NULL, 'Active'),
+(3, 7, '2026-04-01', '2026-05-01', NULL, 'Active'),
+(4, 10, '2026-04-18', '2026-05-03', NULL, 'Active');
+GO