prism-tui PoC

tui/src/cli.cpp

@@ -0,0 +1,62 @@
+#include "cli.h"
+
+namespace Prism::Tui {
+
+ParseResult parseArguments(const std::vector<std::string>& arguments) {
+    ParseResult result;
+    result.ok = true;
+
+    for (size_t index = 0; index < arguments.size(); ++index) {
+        const auto& argument = arguments[index];
+        if (argument == "--help" || argument == "-h") {
+            if (arguments.size() != 1) {
+                return {false, {}, "--help cannot be combined with other arguments."};
+            }
+            result.options.command = Command::Help;
+            continue;
+        }
+        if (argument == "--version" || argument == "-V") {
+            if (arguments.size() != 1) {
+                return {false, {}, "--version cannot be combined with other arguments."};
+            }
+            result.options.command = Command::Version;
+            continue;
+        }
+        if (argument == "--list-devices") {
+            if (arguments.size() != 1) {
+                return {false, {}, "--list-devices cannot be combined with other arguments."};
+            }
+            result.options.command = Command::ListDevices;
+            continue;
+        }
+        if (argument == "--device") {
+            if (index + 1 >= arguments.size() || arguments[index + 1].empty() ||
+                arguments[index + 1][0] == '-') {
+                return {false, {}, "--device requires a non-empty device ID."};
+            }
+            if (!result.options.deviceId.empty()) {
+                return {false, {}, "--device may only be specified once."};
+            }
+            result.options.deviceId = arguments[++index];
+            continue;
+        }
+        return {false, {}, "Unknown argument: " + argument};
+    }
+
+    return result;
+}
+
+std::string usageText() {
+    return
+        "Usage: prism-tui [--device <id>]\n"
+        "       prism-tui --list-devices\n"
+        "       prism-tui --help\n"
+        "       prism-tui --version\n\n"
+        "Options:\n"
+        "  --device <id>     Capture a specific system output device.\n"
+        "  --list-devices    List available system output devices.\n"
+        "  -h, --help        Show this help.\n"
+        "  -V, --version     Show the Prism TUI version.\n";
+}
+
+}  // namespace Prism::Tui