1 files changed, 70 insertions, 0 deletions
diff --git a/lib/cli.php b/lib/cli.php
new file mode 100644
index 0000000..3bda20f
--- /dev/null
+++ b/lib/cli.php
@@ -0,0 +1,70 @@
+<?php
+
+class cli {
+
+    protected ?array $commandsCache = null;
+
+    public function __construct(
+        protected string $ns
+    ) {}
+
+    protected function usage($error = null): void {
+        global $argv;
+
+        if (!is_null($error))
+            echo "error: {$error}\n\n";
+
+        echo "Usage: $argv[0] COMMAND\n\nCommands:\n";
+        foreach ($this->getCommands() as $c)
+            echo "    $c\n";
+
+        exit(is_null($error) ? 0 : 1);
+    }
+
+    public function getCommands(): array {
+        if (is_null($this->commandsCache)) {
+            $funcs = array_filter(get_defined_functions()['user'], fn(string $f) => str_starts_with($f, $this->ns));
+            $funcs = array_map(fn(string $f) => str_replace('_', '-', substr($f, strlen($this->ns.'\\'))), $funcs);
+            $this->commandsCache = array_values($funcs);
+        }
+        return $this->commandsCache;
+    }
+
+    public function run(): void {
+        global $argv, $argc;
+
+        if (PHP_SAPI != 'cli')
+            cli::die('SAPI != cli');
+
+        if ($argc < 2)
+            $this->usage();
+
+        $func = $argv[1];
+        if (!in_array($func, $this->getCommands()))
+            self::usage('unknown command "'.$func.'"');
+
+        $func = str_replace('-', '_', $func);
+        call_user_func($this->ns.'\\'.$func);
+    }
+
+    public static function input(string $prompt): string {
+        echo $prompt;
+        $input = substr(fgets(STDIN), 0, -1);
+        return $input;
+    }
+
+    public static function silentInput(string $prompt = ''): string {
+        echo $prompt;
+        system('stty -echo');
+        $input = substr(fgets(STDIN), 0, -1);
+        system('stty echo');
+        echo "\n";
+        return $input;
+    }
+
+    public static function die($error): void {
+        fwrite(STDERR, "error: {$error}\n");
+        exit(1);
+    }
+
+}
+\ No newline at end of file