Initial commit

src/main/java/net/raphimc/viaproxy/cli/ConsoleFormatter.java

@@ -0,0 +1,87 @@
+package net.raphimc.viaproxy.cli;
+
+public class ConsoleFormatter {
+
+    private static final String PREFIX = "\033[";
+    private static final String SUFFIX = "m";
+
+    public static String convert(final String s) {
+        StringBuilder out = new StringBuilder();
+        char[] chars = s.toCharArray();
+        for (int i = 0; i < chars.length; i++) {
+            char c = chars[i];
+            char next = i + 1 < chars.length ? chars[i + 1] : '\0';
+            if (c == '§') {
+                if (next != '\0') {
+                    if (isColor(next)) out.append(convertToAnsi('r'));
+                    out.append(convertToAnsi(next));
+                    i++;
+                }
+            } else {
+                out.append(c);
+            }
+        }
+        return out + convertToAnsi('r');
+    }
+
+    //The ANSI codes are an approximation. True color is used to get the exact color.
+    private static String convertToAnsi(final char color) {
+        switch (Character.toLowerCase(color)) {
+            case '0': //Black
+                return PREFIX + getColor("30", 0x00_00_00) + SUFFIX;
+            case '1': //Dark Blue
+                return PREFIX + getColor("34", 0x00_00_AA) + SUFFIX;
+            case '2': //Dark Green
+                return PREFIX + getColor("32", 0x00_AA_00) + SUFFIX;
+            case '3': //Dark Aqua
+                return PREFIX + getColor("36", 0x00_AA_AA) + SUFFIX;
+            case '4': //Dark Red
+                return PREFIX + getColor("31", 0xAA_00_00) + SUFFIX;
+            case '5': //Dark Purple
+                return PREFIX + getColor("35", 0xAA_00_AA) + SUFFIX;
+            case '6': //Gold
+                return PREFIX + getColor("33", 0xFF_AA_00) + SUFFIX;
+            case '7': //Gray
+                return PREFIX + getColor("37", 0xAA_AA_AA) + SUFFIX;
+            case '8': //Dark Gray
+                return PREFIX + getColor("90", 0x55_55_55) + SUFFIX;
+            case '9': //Blue
+                return PREFIX + getColor("94", 0x55_55_FF) + SUFFIX;
+            case 'a': //Green
+                return PREFIX + getColor("92", 0x55_FF_55) + SUFFIX;
+            case 'b': //Aqua
+                return PREFIX + getColor("96", 0x55_FF_FF) + SUFFIX;
+            case 'c': //Red
+                return PREFIX + getColor("91", 0xFF_55_55) + SUFFIX;
+            case 'd': //Light Purple
+                return PREFIX + getColor("95", 0xFF_55_FF) + SUFFIX;
+            case 'e': //Yellow
+                return PREFIX + getColor("93", 0xFF_FF_55) + SUFFIX;
+            case 'f': //White
+                return PREFIX + getColor("97", 0xFF_FF_FF) + SUFFIX;
+            case 'k': //Obfuscated
+                return ""; //Not supported in terminal
+            case 'l': //Bold
+                return PREFIX + "1" + SUFFIX;
+            case 'm': //Strikethrough
+                return PREFIX + "9" + SUFFIX;
+            case 'n': //Underline
+                return PREFIX + "4" + SUFFIX;
+            case 'o': //Italic
+                return PREFIX + "3" + SUFFIX;
+            case 'r': //Reset
+            default:
+                return PREFIX + 0 + SUFFIX;
+        }
+    }
+
+    private static boolean isColor(char color) {
+        color = Character.toLowerCase(color);
+        return color >= '0' && color <= '9' || color >= 'a' && color <= 'f';
+    }
+
+    private static String getColor(final String ansi, final int rgb) {
+        return String.format("38;2;%d;%d;%d", (rgb >> 16) & 255, (rgb >> 8) & 255, rgb & 255);
+    }
+
+}