Implement basic paste viewing

app/Http/Controllers/PasteController.php

@@ -0,0 +1,196 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+
+use App\Http\Requests;
+
+use App\Paste;
+
+use Pygmentize\Pygmentize;
+
+class PasteController extends Controller
+{
+	public function view(Request $request, Paste $paste)
+	{
+		$format = $request->input('format', 'html'); //TODO: Use HTTP content negotiation for the default format
+
+		switch($format)
+		{
+			case 'html':
+				return $this->view_html($paste);
+			case 'raw':
+				return $this->view_raw($paste);
+			case 'json':
+				return $this->view_json($paste); 
+			case 'latex':
+				return $this->view_latex($paste);
+			case 'png':
+				return $this->view_png($paste);
+			default:
+				break; //TODO: Throw an exception
+		}
+	}
+
+	private function view_html(Paste $paste)
+	{
+		if($paste->deleted)
+		{
+			return view('paste.deleted', [
+				'id' => $paste->id,
+				'deletion_reason' => $paste->deletion->reason,
+				'deleted_by' => $paste->deletion->deleted_by,
+				'deleted_at' => $paste->deletion->deleted_at
+			]);
+		}
+		else if($paste->is_future_paste)
+		{
+			return view('paste.future_paste', [
+				'id' => $paste->id,
+				'available_at' => $paste->created_at
+			]);
+		}
+		else if($paste->has_expired)
+		{
+			return view('paste.expired', [
+				'id' => $paste->id
+			]);
+		}
+		else
+		{
+			$content = Pygmentize::highlight($paste->content, $paste->language, "utf-8", "html");
+
+			return view('paste.available', [
+				'id' => $paste->id,
+				'language' => $paste->language,
+				'created_at' => $paste->created_at,
+				'expires_at' => $paste->expires_at,
+				'content' => $content	
+			]);
+		}
+	}
+
+	private function view_raw(Paste $paste)
+	{
+		//TODO: More informative messages
+		if($paste->deleted)
+		{
+			response('This paste was deleted.')->header('Content-Type', 'text/plain');	
+		}
+		else if($paste->is_future_paste)
+		{
+			response('This paste is not available yet.')->header('Content-Type', 'text/plain');	
+		}
+		else if($paste->has_expired)
+		{
+			response('This paste has expired.')->header('Content-Type', 'text/plain');	
+		}
+		else
+		{
+			return response($paste->content)->header('Content-Type', 'text/plain');
+		}
+	}
+
+	private function view_json(Paste $paste)
+	{
+		if($paste->deleted)
+		{
+			return response()->json([
+				'id' => $paste->id,
+				'deleted' => true,
+				'deletion_reason' => $paste->deletion->reason,
+				'deleted_by' => $paste->deletion->deleted_by,
+				'deleted_at' => $paste->deletion->deleted_at
+			]);
+		}
+		else if($paste->is_future_paste)
+		{
+			return response()->json([
+				'id' => $paste->id,
+				'deleted' => false,
+				'future_paste' => true,
+				'available_at' => $paste->created_at
+			]);
+		}
+		else if($paste->has_expired)
+		{
+			return response()->json([
+				'id' => $paste->id,
+				'deleted' => false,
+				'future_paste' => false,
+				'expired' => true
+			]);
+		}
+		else
+		{
+			return response()->json([
+				'id' => $paste->id,
+				'deleted' => false,
+				'future_paste' => false,
+				'expired' => false,
+				'language' => $paste->language,
+				'created_at' => $paste->created_at,
+				'expires_at' => $paste->expires_at,
+				'content' => $paste->content	
+			]);
+		}
+	}	
+
+	private function view_latex(Paste $paste)
+	{
+		//TODO: More informative messages (PNG?)
+		if($paste->deleted)
+		{
+			response('\begin{Verbatim}
+This paste was deleted.
+\end{Verbatim}
+')
+					->header('Content-Type', 'text/plain');	
+		}
+		else if($paste->is_future_paste)
+		{
+			response('\begin{Verbatim}
+This paste is not available yet.
+\end{Verbatim}
+')
+					->header('Content-Type', 'text/plain');	
+		}
+		else if($paste->has_expired)
+		{
+			response('\begin{Verbatim}
+This paste has expired.
+\end{Verbatim}
+')
+					->header('Content-Type', 'text/plain');	
+		}
+		else
+		{
+			$content = Pygmentize::highlight($paste->content, $paste->language, "utf-8", "latex");
+
+			return response($content)->header('Content-Type', 'text/plain');
+		}
+	}
+	private function view_png(Paste $paste)
+	{
+		//TODO: More informative messages (PNG?)
+		if($paste->deleted)
+		{
+			response('This paste was deleted.')->header('Content-Type', 'text/plain');	
+		}
+		else if($paste->is_future_paste)
+		{
+			response('This paste is not available yet.')->header('Content-Type', 'text/plain');	
+		}
+		else if($paste->has_expired)
+		{
+			response('This paste has expired.')->header('Content-Type', 'text/plain');	
+		}
+		else
+		{
+			$content = Pygmentize::highlight($paste->content, $paste->language, "utf-8", "png");
+
+			return response($content)->header('Content-Type', 'image/png');
+		}
+	}
+}

app/Http/routes.php

@@ -14,3 +14,5 @@
 Route::get('/', function () {
     return view('welcome');
 });
+
+Route::get('/paste/{paste}', 'PasteController@view');

app/Paste.php

@@ -57,6 +57,11 @@ class Paste extends Model
 		return $this->expires && $this->expires_at < Carbon::now();
 	}
 
+	public function getIsFuturePasteAttribute()
+	{
+		return $this->created_at > Carbon::now();
+	}
+
 	public function getContentAttribute()
 	{
 		if($this->deleted)