Rewrite, cleanup and bugfixes
* More events added, constants cleaned up * Events now handled using noccylabs/tinyevent * Fixed magenta/cyan mixup in style * Fixed LineRead not resetting history pointer on command
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b6727bed80
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5a45ca9c46
@ -13,5 +13,8 @@
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"psr-4": {
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"NoccyLabs\\Shell\\": "lib/"
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}
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},
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"require": {
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"noccylabs/tinyevent": "~0.1.1"
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}
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}
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@ -1,12 +1,36 @@
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<?php
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/*
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* Basic shell example, demonstrates adding a listener to update the prompt with
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* the current time as well as creating an "anonymous" context and adding a
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* command to it. It also shows how to change the style of the prompt.
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*
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*/
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require_once __DIR__."/../vendor/autoload.php";
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use NoccyLabs\Shell\Shell;
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use NoccyLabs\Shell\Style;
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use NoccyLabs\Shell\Context;
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$myShell = new Shell();
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// Set the style of prompt and input
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$myShell->setPromptStyle(new Style(Style::BR_GREEN, Style::GREEN));
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$myShell->setInputStyle(new Style(Style::BR_CYAN));
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// Add a listener to update the prompt
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$myShell->addListener(Shell::EVT_UPDATE_PROMPT, function ($e) {
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$e->shell->setPrompt(date("H:i:s").">");
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});
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// Set the initial prompt, not really needed.
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$myShell->setPrompt("test>");
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$myShell->pushContext(new Context());
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// Create an anonymous context and add a command
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$ctx = $myShell->createContext("root");
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$ctx->addCommand("hello", function () {
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echo "Hello World!\n";
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});
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// Run the shell
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$myShell->run();
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@ -2,6 +2,10 @@
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namespace NoccyLabs\Shell;
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/**
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* This is a readline-like implementation in pure PHP.
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*
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*/
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class LineRead
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{
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@ -127,6 +131,7 @@ class LineRead
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array_unshift($this->history, $this->buffer);
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$this->buffer = null;
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$this->posCursor = 0;
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$this->posHistory = 0;
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printf("\n\r");
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$this->state = self::STATE_IDLE;
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}
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142
lib/Shell.php
142
lib/Shell.php
@ -3,32 +3,50 @@
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namespace NoccyLabs\Shell;
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use NoccyLabs\Shell\LineRead;
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use NoccyLabs\TinyEvent\EventEmitterTrait;
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use NoccyLabs\TinyEvent\Event;
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class Shell
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{
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const EV_PROMPT = "prompt";
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const EV_COMMAND = "command";
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use EventEmitterTrait;
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const EVT_UPDATE_PROMPT = "shell.prompt"; // called to update the prompt
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const EVT_BEFORE_COMMAND = "shell.command.before"; // before a command is executed
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const EVT_AFTER_COMMAND = "shell.command.after"; // after a command is executed
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const EVT_NO_COMMAND = "shell.command.missing"; // no such command found
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const EVT_CONTEXT_CHANGED = "shell.context"; // a new context is activated
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const EVT_SHELL_START = "shell.start"; // the shell is about to start
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const EVT_SHELL_STOP = "shell.stop"; // the shell is about to exit
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const EVT_SHELL_ABORT = "shell.abort"; // the shell was aborted (ctrl-c)
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const EVT_SHELL_ESCAPE = "shell.escape"; // escape key pressed
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/**
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* @var LineRead The lineread instance
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*/
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protected $lineReader = null;
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/**
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* @var Context The current context
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*/
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protected $context = null;
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/**
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* @var Context[] The stack of parent contexts
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*/
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protected $contextStack = [];
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protected $listeners = [];
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protected $timers = [];
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protected $tasks = [];
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protected $prompt = ">";
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protected $prompt_style = null;
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protected $input_style = null;
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public function __construct()
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{
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$this->configure();
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}
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protected function configure()
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{
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}
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/**
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@ -44,7 +62,7 @@ class Shell
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}
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$context->setShell($this);
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$this->context = $context;
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$this->dispatchEvent("context.update", [ "context"=>$this->context ]);
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$this->dispatchEvent(self::EVT_CONTEXT_CHANGED);
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}
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/**
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@ -60,7 +78,7 @@ class Shell
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} else {
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$this->context = null;
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}
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$this->dispatchEvent("context.update", [ "context"=>$this->context ]);
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$this->dispatchEvent(self::EVT_CONTEXT_CHANGED);
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return $previous;
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}
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@ -81,43 +99,19 @@ class Shell
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return join($separator,$stack);
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}
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public function createContext()
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/**
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* Create a new empty context and push it on the stack.
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*
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* @param string $name The name of the context to create
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* @return Context The created context
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*/
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public function createContext($name)
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{
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$context = new Context();
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$context = new Context($name);
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$this->pushContext($context);
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return $context;
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}
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/**
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* Add a handler to be called when an event fires.
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*
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* @param string $event
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* @param callable $handler
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*/
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public function addListener($event, callable $handler)
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{
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if (!array_key_exists($event,$this->listeners)) {
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$this->listeners[$event] = [];
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}
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$this->listeners[$event][] = $handler;
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}
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/**
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* Invoke event handlers for event.
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*
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* @param string $event
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* @param callable $handler
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*/
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protected function dispatchEvent($event, array $data=[])
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{
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if (!array_key_exists($event,$this->listeners)) {
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return;
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}
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foreach ($this->listeners[$event] as $handler) {
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call_user_func($handler, (object)$data, $this);
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}
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}
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/**
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* Add a callback to be called at a regular interval during the update phase.
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* Adding timers with a low interval (less than 200 i.e. 0.2s) may have an
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@ -174,6 +168,24 @@ class Shell
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}
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}
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public function setPromptStyle(Style $style)
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{
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$this->prompt_style = $style;
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if ($this->lineReader) {
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$this->lineReader->setPromptStyle($style);
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}
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}
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public function setInputStyle(Style $style)
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{
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$this->input_style = $style;
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if ($this->lineReader) {
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$this->lineReader->setCommandStyle($style);
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}
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}
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/**
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* Find a command and return a closure.
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*
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@ -269,12 +281,12 @@ class Shell
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}
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}
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ksort($ghelp);
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printf("Commands in current context:\n");
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//printf("Commands in current context:\n");
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foreach ($help as $command=>$info) {
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printf(" %-20s %s\n", $command, $info);
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}
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if (count($ghelp)) {
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printf("\nImported from parent contexts:\n");
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//printf("\nImported from parent contexts:\n");
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foreach ($ghelp as $command=>$info) {
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printf(" %-20s %s\n", $command, $info);
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}
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@ -308,18 +320,6 @@ class Shell
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} catch (Exception\ShellException $e) {
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echo "\e[31;91;1m{$e->getMessage()}\e[0m\n";
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}
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/*
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if (array_key_exists($commandName, $this->commands)) {
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$command = $this->commands[$commandName];
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if ($command instanceof Command) {
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$command->run($buffer);
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} else {
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call_user_func_array($command,$buffer);
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}
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return;
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}
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$this->writeln("Bad command: ".$commandName);
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*/
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}
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public function run()
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@ -328,12 +328,13 @@ class Shell
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$this->lineReader = new LineRead();
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$this->lineReader->setPromptText($this->prompt);
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$this->lineReader->setPromptStyle(new Style(Style::BR_GREEN));
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$this->lineReader->setCommandStyle(new Style(Style::GREEN));
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$this->lineReader->setPromptStyle($this->prompt_style?:new Style(Style::BR_GREEN));
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$this->lineReader->setCommandStyle($this->input_style?:new Style(Style::GREEN));
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$this->running = true;
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$this->dispatchEvent("prompt", [ "context"=>$this->context ]);
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$this->dispatchEvent(self::EVT_UPDATE_PROMPT);
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$this->dispatchEvent(self::EVT_SHELL_START);
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while ($this->running) {
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// Update the input stuff, sleep if nothing to do.
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@ -342,12 +343,12 @@ class Shell
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}
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// Escape is handy too...
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if ($buffer == "\e") {
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$this->dispatchEvent("shell.abort");
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$this->dispatchEvent(self::EVT_SHELL_ESCAPE);
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continue;
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}
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// we get a ^C on ^C, so deal with the ^C.
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if ($buffer == "\x03") {
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$this->dispatchEvent("shell.stop");
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$this->dispatchEvent(self::EVT_SHELL_ABORT);
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$this->stop();
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continue;
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}
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@ -357,6 +358,9 @@ class Shell
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foreach ($this->timers as $timer) {
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$timer->update();
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}
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foreach ($this->tasks as $task) {
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$task->update();
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}
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if ($buffer) {
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$this->executeBuffer($buffer);
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}
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@ -374,7 +378,7 @@ class Shell
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}
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if ($buffer) {
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$this->dispatchEvent("prompt", [ "context"=>$this->context ]);
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$this->dispatchEvent(self::EVT_UPDATE_PROMPT);
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}
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}
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@ -382,10 +386,20 @@ class Shell
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fprintf(STDERR, "\e[31;1mFatal: Unhandled exception\e[0m\n\n%s\n", $e);
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}
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$this->dispatchEvent(self::EVT_SHELL_STOP);
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$this->lineReader = null;
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}
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private function dispatchEvent($type, array $data=[])
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{
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$data['shell'] = $this;
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$data['context'] = $this->context;
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$event = new Event($type, $data);
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$this->emitEvent($type, $event);
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}
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public function stop()
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{
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$this->running = false;
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@ -11,16 +11,17 @@ class Style
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const GREEN = 2;
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const YELLOW = 3;
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const BLUE = 4;
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const CYAN = 5;
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const MAGENTA = 6;
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const MAGENTA = 5;
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const CYAN = 6;
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const WHITE = 7;
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const GRAY = 8;
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const BR_RED = 9;
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const BR_GREEN = 10;
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const BR_YELLOW = 11;
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const BR_BLUE = 12;
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const BR_CYAN = 13;
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const BR_MAGENTA = 14;
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const BR_MAGENTA = 13;
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const BR_CYAN = 14;
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const BR_WHITE = 15;
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const A_INTENSE = 1;
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