103 lines
2.5 KiB
D
103 lines
2.5 KiB
D
module command.base;
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import consolecolors;
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import std.stdio;
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import std.string;
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import std.uni;
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interface CliCommand {
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void handle(string[] args);
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string name() const;
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string description() const;
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}
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class CliHandler {
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private CliCommand[string] commands;
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private bool exitRequested = false;
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this() {
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commands["help"] = new HelpCommand(this);
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commands["exit"] = new ExitCommand(this);
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}
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void register(string name, CliCommand command) {
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this.commands[name.strip().toLower()] = command;
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}
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void readAndHandleCommand() {
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string[] commandAndArgs = readln().strip().split!isWhite();
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if (commandAndArgs.length == 0) return;
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string command = commandAndArgs[0].toLower();
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if (command in commands) {
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commands[command].handle(commandAndArgs.length > 1 ? commandAndArgs[1 .. $] : []);
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} else {
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cwritefln("Unknown command: %s".red, command.orange);
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}
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}
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void setExitRequested() {
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this.exitRequested = true;
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}
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bool isExitRequested() const {
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return this.exitRequested;
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}
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CliCommand[string] getCommands() {
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return this.commands;
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}
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}
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class HelpCommand : CliCommand {
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private CliHandler handler;
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this(CliHandler handler) {
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this.handler = handler;
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}
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void handle(string[] args) {
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import std.algorithm;
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cwriteln("<blue>Gymboard CLI Help</blue>: <grey>Information about how to use this program.</grey>");
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string[] commandNames = this.handler.getCommands().keys;
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sort(commandNames);
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uint longestCommandNameLength = commandNames.map!(n => cast(uint) n.length).maxElement;
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foreach (name; commandNames) {
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CliCommand command = this.handler.getCommands()[name];
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string formattedName = cyan(leftJustify(name, longestCommandNameLength + 1, ' '));
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cwriteln(formattedName, command.description().grey);
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}
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}
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string name() const {
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return "help";
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}
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string description() const {
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return "Shows help information.";
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}
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}
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class ExitCommand : CliCommand {
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private CliHandler handler;
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this(CliHandler handler) {
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this.handler = handler;
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}
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void handle(string[] args) {
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this.handler.setExitRequested();
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}
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string name() const {
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return "exit";
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}
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string description() const {
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return "Exits the CLI, gracefully stopping any services or running jobs.";
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}
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}
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