├── LICENSE ├── Makefile ├── README.md ├── bucket_game.sql ├── demo.gif └── snakeviewer.c /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . -------------------------------------------------------------------------------- /Makefile: -------------------------------------------------------------------------------- 1 | 2 | CC = gcc 3 | FLAGS = -Wall -Wextra $(shell pkg-config --cflags --libs gtk4 mysqlclient libbsd) -pthread 4 | 5 | snakeviewer: snakeviewer.c 6 | $(CC) $^ -o $@ $(FLAGS) 7 | 8 | .PHONY : clean 9 | clean: 10 | -rm snakeviewer 11 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # mysql-snake 2 | 3 | ![](demo.gif) 4 | 5 | Classic video game revived with a new story, now available for 6 | your MySQL database. 7 | 8 | A supermarket is giving out free buckets to visitors. Each receiver of 9 | a bucket shows their brand new pail to two friends, who naturally rush 10 | to the supermarket to get buckets of their own. Your task is to make 11 | sure nobody gets hurt as the entire town flocks to get their free 12 | bucket. 13 | 14 | ## Fake testimonials 15 | "Work has never been so fun." — Intern at some company 16 | 17 | "What's up with our website?" — CEO at that same company 18 | 19 | "Get a life." — Grandmother from Pihtipudas 20 | 21 | ## How can I play? 22 | 23 | Load the contents of bucket_game.sql into a MySQL database. Start the 24 | game loop by enabling the gameLoopEvent scheduled event. The game is 25 | initialized or restarted by calling the initGame stored 26 | procedure. gameLoopEvent is not automatically disabled when the game 27 | ends. 28 | 29 | To change direction, set the direction column of the first row in the 30 | direction table to equal "UP", "DOWN", "LEFT", or "RIGHT". 31 | 32 | ## How can I see what I play? 33 | 34 | mysql-snake comes with a stored procedure, renderGame, that outputs 35 | the current game state represented with emojis in an UTF-8 36 | string. renderGame can be used from any MySQL client, or with the 37 | snakeviewer program in this repository. To use snakeviewer, edit the 38 | connection information at the top of snakeviewer.c to fit where you 39 | want to connect, and then make && ./snakeviewer. snakeviewer calls 40 | renderGame 4 times per second and displays the result in a GTK 41 | TextView. 42 | 43 | ## Dependencies 44 | 45 | ### mysql-snake 46 | 47 | MySQL 8.0 is required to run the game. MySQL 5.7 might work too but I 48 | have not tried it. A font with emojis is required to see the game. 49 | 50 | ### snakeviewer 51 | * mysqlclient 52 | * gtk4 53 | * libbsd 54 | -------------------------------------------------------------------------------- /bucket_game.sql: -------------------------------------------------------------------------------- 1 | -- Tables 2 | 3 | CREATE TABLE `bucket` ( 4 | `id` int NOT NULL AUTO_INCREMENT, 5 | `x` int NOT NULL, 6 | `y` int NOT NULL, 7 | `icon` varchar(4) CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci NOT NULL, 8 | PRIMARY KEY (`id`) 9 | ) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; 10 | 11 | CREATE TABLE `direction` ( 12 | `id` int NOT NULL AUTO_INCREMENT, 13 | `direction` varchar(5) COLLATE utf8mb4_unicode_ci NOT NULL, 14 | PRIMARY KEY (`id`) 15 | ) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; 16 | 17 | CREATE TABLE `game_over` ( 18 | `id` int NOT NULL AUTO_INCREMENT, 19 | `game_over` tinyint NOT NULL, 20 | PRIMARY KEY (`id`) 21 | ) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; 22 | 23 | CREATE TABLE `queue` ( 24 | `id` int NOT NULL AUTO_INCREMENT, 25 | `x` int NOT NULL, 26 | `y` int NOT NULL, 27 | `icon` varchar(4) COLLATE utf8mb4_unicode_ci NOT NULL, 28 | PRIMARY KEY (`id`) 29 | ) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; 30 | 31 | CREATE TABLE `queue_icons` ( 32 | `id` int NOT NULL AUTO_INCREMENT, 33 | `icon` varchar(4) COLLATE utf8mb4_unicode_ci NOT NULL, 34 | PRIMARY KEY (`id`) 35 | ) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; 36 | 37 | CREATE TABLE `update_time` ( 38 | `id` int NOT NULL AUTO_INCREMENT, 39 | `last_update` datetime(6) NOT NULL, 40 | PRIMARY KEY (`id`) 41 | ) ENGINE=MEMORY DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci; 42 | 43 | -- Procedures and functions 44 | DELIMITER ;; 45 | 46 | CREATE FUNCTION `bucketOnHead`() RETURNS tinyint 47 | READS SQL DATA 48 | BEGIN 49 | DECLARE head_x, head_y, bucket_x, bucket_y INT; 50 | SELECT x, y FROM queue LIMIT 1 INTO head_x, head_y; 51 | SELECT x, y FROM bucket INTO bucket_x, bucket_y; 52 | IF head_x = bucket_x AND head_y = bucket_y THEN 53 | RETURN 1; 54 | ELSE 55 | RETURN 0; 56 | END IF; 57 | END ;; 58 | 59 | CREATE PROCEDURE `checkGameOver`() 60 | BEGIN 61 | DECLARE head_x, head_y INT; 62 | SELECT x, y FROM queue LIMIT 1 INTO head_x, head_y; 63 | IF (SELECT (SELECT id FROM queue WHERE id != 1 AND x = head_x AND y = head_y) IS NOT NULL) THEN 64 | UPDATE game_over SET game_over = 1; 65 | END IF; 66 | END ;; 67 | 68 | CREATE PROCEDURE `extendQueue`() 69 | BEGIN 70 | DECLARE second_x, second_y INT; 71 | SELECT x, y FROM queue WHERE id = 2 INTO second_x, second_y; 72 | 73 | UPDATE queue q1 74 | LEFT JOIN queue q2 ON q2.id = q1.id + 1 75 | SET q1.icon = IF(q2.icon IS NULL, getRandomIcon(), q2.icon); 76 | 77 | INSERT INTO queue (x, y, icon) VALUES (second_x, second_y, getRandomIcon()); 78 | END ;; 79 | 80 | CREATE PROCEDURE `gameLoop`() 81 | BEGIN 82 | CALL updateGame(); 83 | DO SLEEP(0.25); 84 | CALL updateGame(); 85 | DO SLEEP(0.25); 86 | CALL updateGame(); 87 | DO SLEEP(0.25); 88 | CALL updateGame(); 89 | END ;; 90 | 91 | CREATE FUNCTION `gameStr`() RETURNS text CHARSET utf8mb4 COLLATE utf8mb4_unicode_ci 92 | READS SQL DATA 93 | BEGIN 94 | DECLARE height INT DEFAULT 10; 95 | DECLARE width INT DEFAULT 10; 96 | DECLARE loop_x INT DEFAULT 0; 97 | DECLARE loop_y INT DEFAULT 0; 98 | DECLARE game_str TEXT DEFAULT ""; 99 | DECLARE bucket_x INT; 100 | DECLARE bucket_y INT; 101 | DECLARE bucket_icon VARCHAR(4); 102 | DECLARE current_icon VARCHAR(4) DEFAULT "🟩"; 103 | DECLARE queue_icon VARCHAR(4) DEFAULT NULL; 104 | SELECT x, y, icon FROM bucket INTO bucket_x, bucket_y, bucket_icon; 105 | WHILE loop_y < height DO 106 | WHILE loop_x < width DO 107 | IF (bucket_x = loop_x AND bucket_y = loop_y) THEN SET current_icon = bucket_icon; 108 | END IF; 109 | SET queue_icon = (SELECT icon FROM queue WHERE x = loop_x AND y = loop_y LIMIT 1); 110 | IF (queue_icon IS NOT NULL) THEN SET current_icon = queue_icon; 111 | END IF; 112 | SET game_str = CONCAT(game_str, current_icon); 113 | SET queue_icon = NULL; 114 | SET current_icon = "🟩"; 115 | SET loop_x = loop_x + 1; 116 | END WHILE; 117 | SET game_str = CONCAT(game_str, "\n"); 118 | SET loop_x = 0; 119 | SET loop_y = loop_y + 1; 120 | END WHILE; 121 | RETURN game_str; 122 | END ;; 123 | 124 | CREATE FUNCTION `getRandomIcon`() RETURNS varchar(4) CHARSET utf8mb4 COLLATE utf8mb4_unicode_ci 125 | READS SQL DATA 126 | BEGIN 127 | RETURN (SELECT icon FROM queue_icons ORDER BY RAND() LIMIT 1); 128 | END ;; 129 | 130 | CREATE PROCEDURE `initGame`() 131 | BEGIN 132 | TRUNCATE TABLE bucket; 133 | INSERT INTO bucket (x, y, icon) VALUES (1,1,"🪣"); 134 | 135 | TRUNCATE TABLE queue_icons; 136 | INSERT INTO queue_icons (icon) VALUES ("🕵️"); 137 | INSERT INTO queue_icons (icon) VALUES ("🧑‍⚕️"); 138 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🎓"); 139 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🏫"); 140 | INSERT INTO queue_icons (icon) VALUES ("🧑‍⚖️"); 141 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🌾"); 142 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🍳"); 143 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🔧"); 144 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🏭"); 145 | INSERT INTO queue_icons (icon) VALUES ("🧑‍💼"); 146 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🔬"); 147 | INSERT INTO queue_icons (icon) VALUES ("🧑‍💻"); 148 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🎤"); 149 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🎨"); 150 | INSERT INTO queue_icons (icon) VALUES ("🧑‍✈️"); 151 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🚀"); 152 | INSERT INTO queue_icons (icon) VALUES ("🧑‍🚒"); 153 | INSERT INTO queue_icons (icon) VALUES ("👮"); 154 | INSERT INTO queue_icons (icon) VALUES ("💂"); 155 | INSERT INTO queue_icons (icon) VALUES ("👷"); 156 | INSERT INTO queue_icons (icon) VALUES ("👳"); 157 | INSERT INTO queue_icons (icon) VALUES ("👲"); 158 | INSERT INTO queue_icons (icon) VALUES ("🧕"); 159 | INSERT INTO queue_icons (icon) VALUES ("🤵"); 160 | INSERT INTO queue_icons (icon) VALUES ("👰"); 161 | INSERT INTO queue_icons (icon) VALUES ("🎅"); 162 | 163 | TRUNCATE TABLE queue; 164 | INSERT INTO queue (x, y, icon) VALUES (5,5,getRandomIcon()); 165 | INSERT INTO queue (x, y, icon) VALUES (5,6,getRandomIcon()); 166 | INSERT INTO queue (x, y, icon) VALUES (5,7,getRandomIcon()); 167 | INSERT INTO queue (x, y, icon) VALUES (5,8,getRandomIcon()); 168 | 169 | TRUNCATE TABLE direction; 170 | INSERT INTO direction (direction) VALUES ("UP"); 171 | 172 | TRUNCATE TABLE game_over; 173 | INSERT INTO game_over (game_over) VALUES (0); 174 | 175 | TRUNCATE TABLE update_time; 176 | INSERT INTO update_time (last_update) VALUES (SYSDATE(6)); 177 | END ;; 178 | 179 | CREATE FUNCTION `isGameOver`() RETURNS tinyint 180 | READS SQL DATA 181 | BEGIN 182 | DECLARE retVal TINYINT; 183 | SELECT game_over.game_over FROM game_over INTO retVal; 184 | RETURN retVal; 185 | END ;; 186 | 187 | CREATE PROCEDURE `moveBucket`() 188 | BEGIN 189 | DECLARE new_x INT; 190 | DECLARE new_y INT; 191 | SET new_x = FLOOR(RAND() * 10); 192 | SET new_y = FLOOR(RAND() * 10); 193 | WHILE (SELECT id FROM queue WHERE x = new_x AND y = new_y) IS NOT NULL DO 194 | SET new_x = FLOOR(RAND() * 10); 195 | SET new_y = FLOOR(RAND() * 10); 196 | END WHILE; 197 | UPDATE bucket SET x = new_x, y = new_y; 198 | END ;; 199 | 200 | CREATE PROCEDURE `moveQueue`() 201 | BEGIN 202 | DECLARE current_direction VARCHAR(5); 203 | DECLARE new_x INT; 204 | DECLARE new_y INT; 205 | 206 | UPDATE queue q1 207 | LEFT JOIN queue q2 ON q2.id = q1.id - 1 208 | SET q1.x = q2.x, q1.y = q2.y 209 | WHERE q2.id IS NOT NULL; 210 | 211 | SELECT x, y FROM queue LIMIT 1 INTO new_x, new_y; 212 | SET current_direction = (SELECT direction.direction FROM direction); 213 | IF current_direction = "UP" THEN 214 | SET new_y = new_y - 1; 215 | ELSEIF current_direction = "DOWN" THEN 216 | SET new_y = new_y + 1; 217 | ELSEIF current_direction = "LEFT" THEN 218 | SET new_x = new_x - 1; 219 | ELSEIF current_direction = "RIGHT" THEN 220 | SET new_x = new_x + 1; 221 | END IF; 222 | 223 | SET new_y = MOD(new_y + 10, 10); 224 | SET new_x = MOD(new_x + 10, 10); 225 | 226 | UPDATE queue SET x = new_x, y = new_y LIMIT 1; 227 | END ;; 228 | 229 | CREATE PROCEDURE `renderGame`() 230 | BEGIN 231 | DECLARE game_str TEXT DEFAULT ""; 232 | DECLARE gameOver TINYINT; 233 | SELECT gameStr() INTO game_str; 234 | SELECT isGameOver() INTO gameOver; 235 | IF gameOver = 1 THEN 236 | SELECT CONCAT(game_str, "GAME OVER!"); 237 | ELSE 238 | SELECT game_str; 239 | END IF; 240 | END ;; 241 | 242 | CREATE FUNCTION `sinceLastUpdate`() RETURNS double 243 | READS SQL DATA 244 | BEGIN 245 | DECLARE lastUpdate DATETIME(6); 246 | SELECT last_update FROM update_time LIMIT 1 INTO lastUpdate; 247 | RETURN SYSDATE(6) - lastUpdate; 248 | END ;; 249 | 250 | CREATE PROCEDURE `updateGame`() 251 | BEGIN 252 | DECLARE gameOver TINYINT; 253 | DECLARE sinceLast DOUBLE; 254 | SET sinceLast = sinceLastUpdate(); 255 | SET gameOver = isGameOver(); 256 | IF gameOver = 0 AND sinceLast >= 0.33 THEN 257 | CALL moveQueue(); 258 | IF bucketOnHead() = 1 THEN 259 | CALL moveBucket(); 260 | CALL extendQueue(); 261 | END IF; 262 | CALL checkGameOver(); 263 | UPDATE update_time SET last_update = SYSDATE(6); 264 | END IF; 265 | END ;; 266 | 267 | DELIMITER ; 268 | 269 | -- Events 270 | 271 | CREATE EVENT gameLoopEvent 272 | ON SCHEDULE EVERY 1 SECOND 273 | STARTS '1995-5-7 15:47:00.000' 274 | ON COMPLETION NOT PRESERVE 275 | DISABLE 276 | DO CALL gameLoop(); 277 | -------------------------------------------------------------------------------- /demo.gif: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/VeeEM/mysql-snake/35375ed15d36ef3f6c14b5875511747be2a0bd5b/demo.gif -------------------------------------------------------------------------------- /snakeviewer.c: -------------------------------------------------------------------------------- 1 | #include 2 | #include 3 | #include 4 | #include 5 | #include 6 | #include 7 | 8 | #define DB_ADDRESS "localhost" 9 | #define DB_NAME "db_name" 10 | #define DB_USER "mysql_user" 11 | #define DB_PASSWORD "mysql_password" 12 | 13 | // All MySQL contact is done through this connection. 14 | MYSQL *conn = NULL; 15 | 16 | void exit_with_error(char *); 17 | int update_text(gpointer); 18 | void *update_text_thread(void *); 19 | char *get_game_text(); 20 | void app_activate(GApplication *app, gpointer user_data); 21 | int main(int, char**); 22 | 23 | void exit_with_error(char *comment) { 24 | fprintf(stderr, "%s\n%s\n", mysql_error(conn), comment); 25 | mysql_close(conn); 26 | exit(1); 27 | } 28 | 29 | // Retrieve new game text from database and display it in the 30 | // TextView received as argument. 31 | int update_text(gpointer tv_ptr) { 32 | GtkTextView *tv = GTK_TEXT_VIEW(tv_ptr); 33 | GtkTextBuffer *tb = gtk_text_view_get_buffer(tv); 34 | char *new_text = get_game_text(); 35 | gtk_text_buffer_set_text(tb, new_text, -1); 36 | free(new_text); 37 | return 0; 38 | } 39 | 40 | void *update_text_thread(void *vargp) { 41 | GtkTextView *tv = GTK_TEXT_VIEW(vargp); 42 | while (1) { 43 | usleep(250 * 1000); 44 | g_idle_add(update_text, tv); 45 | } 46 | } 47 | 48 | // Fetch game text from database. 49 | char *get_game_text() { 50 | if (mysql_query(conn, "CALL renderGame();")) { 51 | exit_with_error("Could not call MySQL procedure renderGame."); 52 | } 53 | MYSQL_RES *result = mysql_store_result(conn); 54 | if (result == NULL) { 55 | exit_with_error("Store result"); 56 | } 57 | 58 | char *column_str = mysql_fetch_row(result)[0]; 59 | unsigned long column_length = mysql_fetch_lengths(result)[0]; 60 | char *retval = malloc(sizeof(char) * column_length); 61 | strlcpy(retval, column_str, column_length); 62 | 63 | mysql_free_result(result); 64 | // mysql_next_result must be called after CALLing a stored procedure 65 | // a 0 will be returned indicating that another result is available. 66 | // That result should be empty and mysql_store_result does not have 67 | // to be called here. 68 | mysql_next_result(conn); 69 | 70 | return retval; 71 | } 72 | 73 | void app_activate(GApplication *app, gpointer user_data) { 74 | GtkWidget *win; 75 | GtkWidget *tv; 76 | 77 | win = gtk_application_window_new(GTK_APPLICATION(app)); 78 | gtk_window_set_title(GTK_WINDOW(win), "Snake Viewer"); 79 | 80 | tv = gtk_text_view_new(); 81 | gtk_text_view_set_editable(GTK_TEXT_VIEW(tv), 0); 82 | gtk_text_view_set_cursor_visible(GTK_TEXT_VIEW(tv), 0); 83 | 84 | gtk_window_set_child(GTK_WINDOW(win), tv); 85 | 86 | gtk_widget_show(win); 87 | 88 | GtkStyleContext *tv_style_context = gtk_widget_get_style_context(tv); 89 | GtkCssProvider *css_provider = gtk_css_provider_new(); 90 | char* style_str = "textview { font-size: 24px; min-width: 300px; }"; 91 | gtk_css_provider_load_from_data(css_provider, style_str, strlen(style_str)); 92 | 93 | // Last argument to gtk_style_context_add_provider is guint priority 94 | // "Typically this will be in the range 95 | // GTK_STYLE_PROVIDER_PRIORITY_FALLBACK and GTK_STYLE_PROVIDER_PRIORITY_USER" 96 | gtk_style_context_add_provider(tv_style_context, GTK_STYLE_PROVIDER(css_provider), 600); 97 | 98 | pthread_t thread_id; 99 | pthread_create(&thread_id, NULL, update_text_thread, (void *)tv); 100 | 101 | } 102 | 103 | int main(int argc, char **argv) { 104 | conn = mysql_init(NULL); 105 | if (conn == NULL) { 106 | exit_with_error("Failed to initialize MySQL connection."); 107 | } 108 | if (mysql_real_connect(conn, DB_ADDRESS, DB_USER, DB_PASSWORD, 109 | DB_NAME, 0, NULL, 0) == NULL) { 110 | exit_with_error("Failed to connect to snake database."); 111 | } 112 | 113 | GtkApplication *app; 114 | int stat; 115 | 116 | app = gtk_application_new("com.github.VeeEM.mysql-snake-viewer", G_APPLICATION_FLAGS_NONE); 117 | g_signal_connect(app, "activate", G_CALLBACK(app_activate), NULL); 118 | stat = g_application_run(G_APPLICATION(app), argc, argv); 119 | g_object_unref(app); 120 | 121 | mysql_close(conn); 122 | return stat; 123 | } 124 | --------------------------------------------------------------------------------