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course-work/Implementations/README.md

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+ФАК. НОМЕР: 2301322002 
+ИМЕНА: КРИСТИЯН КАРАМИЛЕВ
+
+Проекта е за стрийминг платформата Twitch.
+Всеки файл отговаря за точка от курсовата работа. 

course-work/Implementations/TwitchDb.sql

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+CREATE TABLE [User] (
+    UserID INT IDENTITY PRIMARY KEY,
+    Username NVARCHAR(50) NOT NULL,
+    Email NVARCHAR(100) NOT NULL UNIQUE,
+    JoinDate DATETIME DEFAULT GETDATE(),
+    IsStreamer BIT DEFAULT 0
+);
+
+CREATE TABLE Channel (
+    ChannelID INT IDENTITY PRIMARY KEY,
+    Name NVARCHAR(100) NOT NULL,
+    Description NVARCHAR(255),
+    FollowersCount INT DEFAULT 0,
+    UserID INT NOT NULL UNIQUE,
+    FOREIGN KEY (UserID) REFERENCES [User](UserID)
+);
+
+CREATE TABLE Subscription (
+    SubscriptionID INT IDENTITY PRIMARY KEY,
+    Tier INT CHECK (Tier BETWEEN 1 AND 3),
+    Price DECIMAL(6,2),
+    StartDate DATE DEFAULT GETDATE(),
+    EndDate DATE NULL,
+    IsActive BIT DEFAULT 1,
+    UserID INT NOT NULL,
+    ChannelID INT NOT NULL,
+    FOREIGN KEY (UserID) REFERENCES [User](UserID),
+    FOREIGN KEY (ChannelID) REFERENCES Channel(ChannelID)
+);
+
+CREATE TABLE Donation (
+    DonationID INT IDENTITY PRIMARY KEY,
+    UserID INT NOT NULL,
+    ChannelID INT NOT NULL,
+    Amount DECIMAL(10,2) NOT NULL,
+    Currency NVARCHAR(10),
+    Message NVARCHAR(255),
+    DonatedAt DATETIME DEFAULT GETDATE(),
+    FOREIGN KEY (UserID) REFERENCES [User](UserID),
+    FOREIGN KEY (ChannelID) REFERENCES Channel(ChannelID)
+);
+
+CREATE TABLE Category (
+    CategoryID INT IDENTITY PRIMARY KEY,
+    Name NVARCHAR(100) NOT NULL,
+    GameType NVARCHAR(100)
+);
+
+CREATE TABLE Stream (
+    StreamID INT IDENTITY PRIMARY KEY,
+    ChannelID INT NOT NULL,
+    CategoryID INT,
+    Title NVARCHAR(150),
+    StartTime DATETIME DEFAULT GETDATE(),
+    EndTime DATETIME NULL,
+    ViewerCount INT DEFAULT 0,
+    FOREIGN KEY (ChannelID) REFERENCES Channel(ChannelID),
+    FOREIGN KEY (CategoryID) REFERENCES Category(CategoryID)
+);
+
+CREATE TABLE Clip (
+    ClipID INT IDENTITY PRIMARY KEY,
+    StreamID INT NOT NULL,
+    Title NVARCHAR(150),
+    Duration INT,
+    Views INT DEFAULT 0,
+    URL NVARCHAR(255),
+    FOREIGN KEY (StreamID) REFERENCES Stream(StreamID)
+);
+
+CREATE TABLE ChatMessage (
+    MessageID INT IDENTITY PRIMARY KEY,
+    UserID INT NOT NULL,
+    StreamID INT NOT NULL,
+    Content NVARCHAR(255),
+    SentAt DATETIME DEFAULT GETDATE(),
+    FOREIGN KEY (UserID) REFERENCES [User](UserID),
+    FOREIGN KEY (StreamID) REFERENCES Stream(StreamID)
+);
+
+CREATE TABLE Follow (
+    FollowerID INT NOT NULL,
+    FollowedID INT NOT NULL,
+    FollowDate DATETIME DEFAULT GETDATE(),
+    PRIMARY KEY (FollowerID, FollowedID),
+    FOREIGN KEY (FollowerID) REFERENCES [User](UserID),
+    FOREIGN KEY (FollowedID) REFERENCES [User](UserID)
+);
+
+
+
+--�������� �����
+INSERT INTO [User] (Username, Email, IsStreamer) VALUES
+('Streamer1', '[email protected]', 1),
+('ViewerA', '[email protected]', 0),
+('ViewerB', '[email protected]', 0);
+
+INSERT INTO Channel (Name, Description, UserID)
+VALUES ('Streamer1 Channel', 'Gameplay and fun', 1);
+
+INSERT INTO Category (Name, GameType)
+VALUES ('Action Games', 'FPS');
+
+INSERT INTO Stream (ChannelID, CategoryID, Title, ViewerCount)
+VALUES (1, 1, 'Live Stream #1', 250);
+
+INSERT INTO Subscription (Tier, Price, UserID, ChannelID)
+VALUES (1, 4.99, 2, 1),
+       (2, 9.99, 3, 1);
+
+INSERT INTO Donation (UserID, ChannelID, Amount, Currency, Message)
+VALUES (2, 1, 5.00, 'USD', 'W STREAM!'),
+       (3, 1, 10.00, 'USD', 'L STREAM');
+
+
+--�������:
+-- ����������� �� ������ ������� �� ����� �����
+CREATE FUNCTION GetTotalDonations(@ChannelID INT)
+RETURNS DECIMAL(10,2)
+AS
+BEGIN
+    DECLARE @Total DECIMAL(10,2);
+    SELECT @Total = SUM(Amount)
+    FROM Donation
+    WHERE ChannelID = @ChannelID;
+    RETURN ISNULL(@Total, 0);
+END;
+GO
+
+-- ����������� �� ��� ���� ���������� �� ����� ����������
+CREATE FUNCTION GetUserSubscriptions(@UserID INT)
+RETURNS INT
+AS
+BEGIN
+    DECLARE @Count INT;
+    SELECT @Count = COUNT(*)
+    FROM Subscription
+    WHERE UserID = @UserID AND IsActive = 1;
+    RETURN ISNULL(@Count, 0);
+END;
+GO
+
+
+SELECT dbo.GetTotalDonations(1) AS TotalDonations;
+
+
+--�������:
+-- ������������ �� Subscription ���� ��������
+CREATE TRIGGER TR_DeactivateSubscription
+ON Subscription
+AFTER UPDATE
+AS
+BEGIN
+    UPDATE Subscription
+    SET IsActive = 0
+    WHERE EndDate < GETDATE();
+END;
+GO
+
+-- ��� ������ �� �� ����� ������� �����
+CREATE TRIGGER TR_AddFollowerCount
+ON Donation
+AFTER INSERT
+AS
+BEGIN
+    UPDATE Channel
+    SET FollowersCount = FollowersCount + 1
+    WHERE ChannelID IN (SELECT ChannelID FROM inserted);
+END;
+GO
+
+
+
+--��������� ���������:
+--  �������� �� Donation
+CREATE PROCEDURE AddDonation
+    @UserID INT,
+    @ChannelID INT,
+    @Amount DECIMAL(10,2),
+    @Currency NVARCHAR(10),
+    @Message NVARCHAR(255)
+AS
+BEGIN
+    INSERT INTO Donation (UserID, ChannelID, Amount, Currency, Message)
+    VALUES (@UserID, @ChannelID, @Amount, @Currency, @Message);
+END;
+GO
+
+-- ������������� �� ���� ������������� � Channel
+CREATE PROCEDURE UpdateFollowers
+    @ChannelID INT,
+    @NewCount INT
+AS
+BEGIN
+    UPDATE Channel
+    SET FollowersCount = @NewCount
+    WHERE ChannelID = @ChannelID;
+END;
+GO
+
+
+EXECUTE AddDonation 
+    @UserID = 3, 
+    @ChannelID = 1, 
+    @Amount = 25.00, 
+    @Currency = 'USD', 
+    @Message = 'Keep up the good work!';
+
+	select * From dbo.Donation