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Code cleanup, better examples, tasks added

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This commit is contained in:
Chris
2017-01-24 14:42:43 +01:00
parent 4cd5cc2620
commit 809c04abfa
7 changed files with 220 additions and 12 deletions
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90
lib/Shell.php
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@@ -13,12 +13,14 @@ class Shell
const EVT_UPDATE_PROMPT = "shell.prompt"; // called to update the prompt
const EVT_BEFORE_COMMAND = "shell.command.before"; // before a command is executed
const EVT_AFTER_COMMAND = "shell.command.after"; // after a command is executed
const EVT_NO_COMMAND = "shell.command.missing"; // no such command found
const EVT_BAD_COMMAND = "shell.command.bad"; // no such command found
const EVT_CONTEXT_CHANGED = "shell.context"; // a new context is activated
const EVT_SHELL_START = "shell.start"; // the shell is about to start
const EVT_SHELL_STOP = "shell.stop"; // the shell is about to exit
const EVT_SHELL_ABORT = "shell.abort"; // the shell was aborted (ctrl-c)
const EVT_SHELL_ESCAPE = "shell.escape"; // escape key pressed
const EVT_TASK_CREATED = "task.created"; // a task was created
const EVT_TASK_DESTROYED = "task.destryed"; // a task was removed or invalidated
/**
* @var LineRead The lineread instance
@@ -34,10 +36,10 @@ class Shell
protected $contextStack = [];
/**
* @var object[] Created timers
*/
*/
protected $timers = [];
/**
* @var object[] Running subtasks
/**
* @var TaskInterface[] Created tasks
*/
protected $tasks = [];
/**
@@ -186,6 +188,37 @@ class Shell
});
}
/**
* Add a task to be update():d in the main loop.
*
* @param TaskInterface $task The task to add
*/
public function addTask(TaskInterface $task)
{
if ($this->dispatchEvent(self::EVT_TASK_CREATED, [
'task' => $task
])->isPropagationStopped()) {
return;
}
$this->tasks[] = $task;
}
/**
* Remove a previously added task. This can also be done by the task returning
* false from its isValid() method.
*
* @param TaskInterface $task The task to remove
*/
public function removeTask(TaskInterface $task)
{
$this->tasks = array_filter($this->tasks, function ($item) use ($task) {
return ($item != $task);
});
$this->dispatchEvent(self::EVT_TASK_DESTROYED, [
'task' => $task
]);
}
/**
* Set the prompt text
*
@@ -268,7 +301,19 @@ class Shell
*/
public function executeCommand($command, ...$args)
{
if ($this->dispatchEvent(self::EVT_BEFORE_COMMAND, [
'command' => $command,
'args' => $args
])->isPropagationStopped()) {
return true;
}
if ($this->executeBuiltin($command, ...$args)) {
$this->dispatchEvent(self::EVT_AFTER_COMMAND, [
'command' => $command,
'args' => $args,
'type' => 'builtin'
]);
return;
}
@@ -278,11 +323,31 @@ class Shell
if ($ret instanceof Context) {
$this->pushContext($ret);
}
$this->dispatchEvent(self::EVT_AFTER_COMMAND, [
'command' => $command,
'args' => $args,
'type' => 'command'
]);
return;
}
// Call 'execute' on the current context
if ($this->context->execute($command, ...$args)) {
$this->dispatchEvent(self::EVT_AFTER_COMMAND, [
'command' => $command,
'args' => $args,
'type' => 'execute'
]);
return;
}
// Fire the EVT_BAD_COMMAND event and return if the event propagation
// has been stopped.
$evt = $this->dispatchEvent(self::EVT_BAD_COMMAND, [
'command'=>$command,
'args'=>$args
]);
if ($evt->isPropagationStopped()) {
return;
}
@@ -330,12 +395,12 @@ class Shell
}
}
ksort($ghelp);
//printf("Commands in current context:\n");
printf("Commands in current context:\n");
foreach ($help as $command=>$info) {
printf(" %-20s %s\n", $command, $info);
}
if (count($ghelp)) {
//printf("\nImported from parent contexts:\n");
printf("\nImported from parent contexts:\n");
foreach ($ghelp as $command=>$info) {
printf(" %-20s %s\n", $command, $info);
}
@@ -411,8 +476,14 @@ class Shell
foreach ($this->timers as $timer) {
$timer->update();
}
foreach ($this->tasks as $task) {
foreach ($this->tasks as $taskidx=>$task) {
$task->update();
if (!$task->isValid()) {
$this->dispatchEvent(self::EVT_TASK_DESTROYED, [
'task' => $task
]);
unset($this->tasks[$taskidx]);
}
}
if ($buffer) {
$this->executeBuffer($buffer);
@@ -423,11 +494,13 @@ class Shell
if (trim($output)) {
$this->lineReader->erase();
echo rtrim($output)."\n";
$this->lineReader->redraw();
if ($this->running)
$this->lineReader->redraw();
}
if (!$this->context) {
$this->stop();
break;
}
if ($buffer) {
@@ -456,6 +529,7 @@ class Shell
$data['context'] = $this->context;
$event = new Event($type, $data);
$this->emitEvent($type, $event);
return $event;
}
/**