Working product with sustainable legacies

main.c

@@ -5,23 +5,36 @@
  */
  
 
+#include <curses.h>
+#include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
-#include <curses.h>
+#include <time.h>
 
 #include "box.h"
 #include "ui.h"
+#include "util.h"
 
 
-int
-main(void)
+enum game_state {
+    GAME_IDLE,   /* can buy AND sell */
+    GAME_BOUGHT, /* cannot buy again */
+    GAME_SOLD,   /* cannot sell again */
+};
+
+struct game {
+    unsigned int     dollars;
+    struct chart     chart;  
+    enum game_state  state;
+};
+
+
+struct box *
+initialize_ui_from_game(struct game *game)
 {
-    struct box    *ui, *top, *bottom, *left, *right, *buy, *sell, *scam,
+    struct box    *ui, *top, *bottom, *left, *right, *buy, *sell, *bank,
                   *title, *desc;
-    struct chart   chart;
-
-    ui_init();
-
+    
     title = new_button_box("Bitcoin");
     desc = new_button_box("A crypto-scam :-)");
 
@@ -29,21 +42,25 @@ main(void)
     append_box(top, title);
     append_box(top, desc);
 
-    chart = new_chart(400);
-    left = new_chart_box(&chart);
+    left = new_chart_box(&game->chart);
     left->fills = 5;
 
     buy = new_button_box("buy");
     buy->color = UI_GREEN;
     sell = new_button_box("sell");
     sell->color = UI_RED;
-    scam = new_button_box("scam");
+
+    char *bank_text = emalloc(500);
+
+    sprintf(bank_text, "YOU HAVE $%d.", game->dollars);
+    
+    bank = new_button_box(bank_text);
     sell->color = UI_BLUE;
 
     right = new_vertical_box();
     append_box(right, buy);
     append_box(right, sell);
-    append_box(right, scam);
+    append_box(right, bank);
 
     bottom = new_horizontal_box();
     bottom->fills = 3;
@@ -54,11 +71,82 @@ main(void)
     append_box(ui, top);
     append_box(ui, bottom);
 
-    draw_box(ui, 0, 0, ui_width(), ui_height());
+    return ui;
+}
 
-    ui_refresh();
-    
-    sleep(300);
+
+/*
+ * Buy 50 coins, price = last price in chart.
+ */
+void game_buy(struct game *game)
+{
+    if (game->state != GAME_IDLE) {
+        return;
+    }
+
+    game->dollars -= game->chart.prices[game->chart.length - 1] * 50;
+    game->state = GAME_BOUGHT;
+}
+
+
+/*
+ * Sell 50 coins, price = last price in chart.
+ */
+void game_sell(struct game *game)
+{
+    if (game->state != GAME_BOUGHT) {
+        return;
+    }
+
+    game->dollars += game->chart.prices[game->chart.length - 1] * 50;
+    game->state = GAME_IDLE;
+}
+
+
+int
+main(void)
+{
+    int           framerate;
+    struct box   *ui;
+    struct game   game;
+
+    framerate = 10;
+
+    game.state = GAME_IDLE;
+    game.dollars = 10000;
+    game.chart = new_chart(200);
+
+    ui_init();
+
+    ui = initialize_ui_from_game(&game);
+
+    for (;;) {
+        draw_box(ui, 0, 0, ui_width(), ui_height());
+
+        ui_refresh();
+
+        clock_t current = clock();
+        clock_t max = current + CLOCKS_PER_SEC * (1.0/framerate);
+
+        for (;;) {
+            switch (getch()) {
+            case 'b':
+                game_buy(&game);
+                break;
+            case 's':
+                game_sell(&game);
+                break;
+            }
+
+            if (clock() >= max) {
+                break;
+            }
+        }
+        
+        update_chart(&game.chart);
+        ui_clear();
+        ui = initialize_ui_from_game(&game);
+    }
 
     ui_end();
 }