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createdb.sql
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createdb.sql
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##################
# PixelGram v0.1 #
##################
# Execute to build initial database structures
# Comment
CREATE DATABASE PixelGram;
CREATE TABLE `PixelGram`.`tbl_user` (
`user_id` BIGINT NULL AUTO_INCREMENT,
`user_name` VARCHAR(45) NULL,
`user_username` VARCHAR(45) NULL,
`user_password` VARCHAR(66) NULL,
PRIMARY KEY (`user_id`)
);
CREATE TABLE `PixelGram`.`tbl_post` (
`post_id` BIGINT NOT NULL AUTO_INCREMENT,
`post_title` VARCHAR(45) DEFAULT NULL,
`post_description` VARCHAR(500) DEFAULT NULL,
`post_user_id` BIGINT DEFAULT NULL,
`post_date` DATETIME DEFAULT NULL,
`post_file_path` VARCHAR(200) NULL,
PRIMARY KEY (`post_id`)
) ENGINE=InnoDB AUTO_INCREMENT=3 DEFAULT CHARSET=latin1;
CREATE TABLE `PixelGram`.`tbl_likes` (
`post_id` BIGINT NOT NULL,
`like_id` BIGINT NOT NULL AUTO_INCREMENT,
`user_id` BIGINT NULL,
`post_like` TINYINT NULL DEFAULT 0,
PRIMARY KEY (`like_id`)
);
CREATE TABLE `PixelGram`.`tbl_postdevices` (
`entry_id` BIGINT NOT NULL AUTO_INCREMENT,
`post_id` BIGINT NOT NULL,
`device_id` INT NULL,
PRIMARY KEY (`entry_id`)
);
# Function to sum the total likes for posts
USE `PixelGram`;
DELIMITER $$
CREATE FUNCTION `getSum` (
p_post_id BIGINT
) RETURNS BIGINT
BEGIN
SET @likesum = 0;
SELECT SUM(post_like) INTO @likesum FROM tbl_likes WHERE post_id = p_post_id;
RETURN @likesum;
END$$
DELIMITER ;
# Function to determine if a user has liked a post
USE `PixelGram`;
DELIMITER $$
CREATE FUNCTION `hasLiked` (
p_post_id BIGINT,
p_user_id BIGINT
) RETURNS TINYINT
BEGIN
SET @likestatus = 0;
SELECT post_like INTO @likestatus FROM tbl_likes WHERE post_id = p_post_id and user_id = p_user_id;
RETURN @likestatus;
END$$
DELIMITER ;
# Procedure for creating a user from passed in data
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_createUser`(
IN p_name VARCHAR(20),
IN p_username VARCHAR(40),
IN p_password VARCHAR(66)
)
BEGIN
# Check whether the user already exists
IF (select exists (select 1 from tbl_user where user_username = p_username) ) THEN
select 'Username Already Exists!';
ELSE
insert into tbl_user
(
user_name,
user_username,
user_password
)
values
(
p_name,
p_username,
p_password
);
END IF;
END$$
DELIMITER ;
# Procedure for validating user login
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_validateLogin`(IN p_username VARCHAR(40)
)
BEGIN
select * from tbl_user where user_username = p_username;
END$$
DELIMITER ;
# Procedure to add a new post
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_newPost`(
IN p_title VARCHAR(45),
IN p_description VARCHAR(500),
IN p_user_id BIGINT,
IN p_file_path VARCHAR(200)
)
BEGIN
INSERT INTO tbl_post(
post_title,
post_description,
post_user_id,
post_date,
post_file_path
)
VALUES(
p_title,
p_description,
p_user_id,
NOW(),
p_file_path
);
SET @last_id = LAST_INSERT_ID();
INSERT INTO tbl_likes(
post_id,
user_id,
post_like
)
VALUES(
@last_id,
p_user_id,
0
);
END$$
DELIMITER ;
# Procedure to retrieve all posts by a user
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_getPostByUser` (
IN p_user_id BIGINT
)
BEGIN
SELECT * FROM tbl_post WHERE post_user_id = p_user_id;
END$$
DELIMITER ;
# Procedure to retrieve a post by its post ID and the userID
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_getPostByID` (
IN p_post_id BIGINT,
IN p_user_id BIGINT
)
BEGIN
SELECT * FROM tbl_post WHERE post_id = p_post_id and post_user_id = p_user_id;
END$$
DELIMITER ;
# Procedure to update a post
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_updatePost` (
IN p_title VARCHAR(45),
IN p_description VARCHAR(500),
IN p_post_id BIGINT,
IN p_user_id BIGINT,
IN p_file_path VARCHAR(200)
)
BEGIN
UPDATE tbl_post SET
post_title = p_title,
post_description = p_description,
post_file_path = p_file_path
WHERE post_id = p_post_id and post_user_id = p_user_id;
END$$
DELIMITER ;
# Procedure to delete posts
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_deletePost` (
IN p_post_id BIGINT,
IN p_user_id BIGINT
)
BEGIN
DELETE from tbl_post where post_id = p_post_id and post_user_id = p_user_id;
END$$
DELIMITER ;
# Procedure to get all posts
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_getAllPosts` (
IN p_user_id BIGINT
)
BEGIN
SELECT post_id, post_title, post_description, post_file_path, getSum(post_id), hasLiked(post_id, p_user_id) FROM tbl_post;
END$$
DELIMITER ;
# Procedure to add/update post likes
USE `PixelGram`
DELIMITER $$
CREATE PROCEDURE `sp_AddUpdateLikes` (
p_post_id BIGINT,
p_user_id BIGINT,
p_like TINYINT
)
BEGIN
# Update existing like entry if it exists
IF (SELECT EXISTS (SELECT 1 FROM tbl_likes WHERE post_id = p_post_id AND user_id = p_user_id)) THEN
# Get current like value
SELECT post_like INTO @curval FROM tbl_likes WHERE post_id = p_post_id AND user_id = p_user_id;
# Toggle like value
IF @curval = 0 THEN
UPDATE tbl_likes SET post_like = 1 WHERE post_id = p_post_id AND user_id = p_user_id;
ELSE
UPDATE tbl_likes SET post_like = 0 WHERE post_id = p_post_id AND user_id = p_user_id;
END IF;
ELSE
INSERT INTO tbl_likes(
post_id,
user_id,
post_like
)
VALUES(
p_post_id,
p_user_id,
p_like
);
END IF;
END$$
DELIMITER ;
# Procedure to retrieve post like status
USE `PixelGram`;
DELIMITER $$
CREATE PROCEDURE `sp_getLikeStatus` (
IN p_post_id BIGINT,
IN p_user_id BIGINT
)
BEGIN
SELECT getSum(p_post_id), hasLiked(p_post_id, p_user_id);
END$$
DELIMITER ;