added support for dynamic content controllers

Also implemented a placeholder generator to showcase it
HaschekSolutions · Aug 26, 2023 · 19d7cb0 · 19d7cb0
1 parent c90a716
commit 19d7cb0
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Showing 10 changed files with 346 additions and 3 deletions.
diff --git a/README.md b/README.md
@@ -56,6 +56,7 @@ Then open http://localhost:8080 in your browser
 
 ## New Features in v2
 
+- Generate placeholder images by specifying the size in the URL. [example](https://pictshare.net/placeholder/555x250/color-white-blue)
 - Added support for external storage
 - [Encryption of files in external storage](/rtfm/ENCRYPTION.md)
 - Added text hosting (like pastebin)
@@ -105,13 +106,13 @@ Read [here](/rtfm/CONFIG.md) what those options do
 - [x] MASTER_DELETE_CODE
 - [x] MASTER_DELETE_IP
 - [x] UPLOAD_FORM_LOCATION
+- [x] S3 Backend
 - [ ] UPLOAD_QUOTA
 - [ ] UPLOAD_CODE
 - [ ] LOW_PROFILE
 - [ ] IMAGE_CHANGE_CODE
 - [ ] MAX_RESIZED_IMAGES
 - [ ] ALLOW_BLOATING
-- [ ] BACKBLAZE
 
 ### Image hosting
 - [x] Resizing

diff --git a/content-controllers/image/image.controller.php b/content-controllers/image/image.controller.php
@@ -10,6 +10,7 @@
 
 class ImageController implements ContentController
 {
+    public const ctype = 'static';
     //returns all extensions registered by this type of content
     public function getRegisteredExtensions(){return array('png','bmp','gif','jpg','jpeg','x-png','webp');}
 

diff --git a/content-controllers/placeholder/fonts/RonysiswadiArchitect5-1GErv.ttf b/content-controllers/placeholder/fonts/RonysiswadiArchitect5-1GErv.ttf
diff --git a/content-controllers/placeholder/placeholder.controller.php b/content-controllers/placeholder/placeholder.controller.php
@@ -0,0 +1,52 @@
+<?php 
+
+class PlaceholderController implements ContentController
+{
+    public const ctype = 'dynamic';
+
+    //returns all extensions registered by this type of content
+    public function getRegisteredExtensions(){return array('placeholder');}
+
+    public function handleHash($hash,$url)
+    {
+        $path = ROOT.DS.'data'.DS.$hash.DS.$hash;
+
+        include_once(dirname(__FILE__).DS.'placeholdergenerator.php');
+        $pg = new PlaceholderGenerator();
+
+        foreach($url as $u)
+        {
+            if(isSize($u))
+                $modifiers['size'] = $u;
+            if(startsWith($u,'color-'))
+            {
+                $u = substr($u,6);
+                $colors = explode('-',$u);
+                foreach($colors as $c)
+                    if(isColor($c))
+                        $modifiers['colors'][] = (ctype_xdigit($c)?$c:color_name_to_hex($c));
+
+                if(count($modifiers['colors'])>4)
+                    $modifiers['colors'] = array_slice($modifiers['colors'],0,4);
+            }
+        }
+
+        $img = $pg->generateImage($modifiers);
+
+        $img = $pg->gradient($img, $modifiers['colors']);
+        $img = $pg->addSizeText($img,$modifiers);
+
+        header ("Content-type: image/jpeg");
+        header ("ETag: $hash");
+        header('Cache-control: public, max-age=31536000');
+
+        imagejpeg($img,null,(defined('JPEG_COMPRESSION')?JPEG_COMPRESSION:90));
+    }
+
+    public function handleUpload($tmpfile,$hash=false)
+    {
+        return array('status'=>'err','hash'=>$hash,'reason'=>'Cannot upload to placeholder image');
+    }
+
+
+}
diff --git a/content-controllers/placeholder/placeholdergenerator.php b/content-controllers/placeholder/placeholdergenerator.php
@@ -0,0 +1,88 @@
+<?php
+
+class PlaceholderGenerator {
+
+    function generateImage($modifiers)
+    {
+        $size = ($modifiers['size']?:'800x600');
+
+        $sd = sizeStringToWidthHeight($size);
+		$width  = $sd['width'];
+        $height = $sd['height'];
+
+        $im = imagecreatetruecolor($width, $height);
+
+        return $im;
+    }
+
+    function addSizeText($im,$modifiers)
+    {
+        $size = imagesx($im).'x'.imagesy($im);
+        $text = $size;
+        //add the size as text in the center of the image
+        $textcolor = imagecolorallocate($im, 0, 0, 0);
+        $font = dirname(__FILE__).DS.'fonts/RonysiswadiArchitect5-1GErv.ttf';
+        //calculate the size of the text to make sure it will alway be visible
+        $fontsize = 20;
+        $textsize = imagettfbbox($fontsize, 0, $font, $text);
+        $scaleX = imagesx($im) / ($textsize[2] - $textsize[0] + 25);
+        $scaleY = imagesy($im) / ($textsize[1] - $textsize[7] + 25);
+
+        $scale = min($scaleX,$scaleY);
+
+        $fontsize = 20 * $scale;
+        $textsize = imagettfbbox($fontsize, 0, $font, $text);
+        $textwidth = $textsize[2] - $textsize[0];
+        $textheight = $textsize[1] - $textsize[7];
+
+        if($textwidth > imagesx($im) || $textheight > imagesy($im))
+            return $im;
+
+        $x = (imagesx($im) - $textwidth) / 2;
+        $y = (imagesy($im) - $textheight) / 2 + $textheight;
+        imagettftext($im, $fontsize, 0, $x, $y, $textcolor, $font, $text);
+
+        return $im;
+    }
+
+    function gradient($im, $c) {
+
+        $w = imagesx($im);
+        $h = imagesy($im);
+
+        if(!$c[0]) $c = ['ffffff','ffffff','ffffff','ffffff'];
+        else if(!$c[1]) $c = [$c[0],$c[0],$c[0],$c[0]];
+        else if(!$c[2]) $c = [$c[0],$c[0],$c[1],$c[1]];
+        else if(!$c[3]) $c = [$c[0],$c[1],$c[2],$c[0]];
+
+        for($i=0;$i<=3;$i++) {
+            $c[$i]=$this->hex2rgb($c[$i]);
+        }
+
+        $rgb=$c[0]; // start with top left color
+        for($x=0;$x<=$w;$x++) { // loop columns
+            for($y=0;$y<=$h;$y++) { // loop rows
+                // set pixel color 
+                $col=imagecolorallocate($im,$rgb[0],$rgb[1],$rgb[2]);
+                imagesetpixel($im,$x-1,$y-1,$col);
+                // calculate new color  
+                for($i=0;$i<=2;$i++) {
+                    $rgb[$i]=
+                        $c[0][$i]*(($w-$x)*($h-$y)/($w*$h)) +
+                        $c[1][$i]*($x     *($h-$y)/($w*$h)) +
+                        $c[2][$i]*(($w-$x)*$y     /($w*$h)) +
+                        $c[3][$i]*($x     *$y     /($w*$h));
+                }
+            }
+        }
+        return $im;
+    }
+
+    function hex2rgb($hex)
+    {
+        $rgb[0]=hexdec(substr($hex,0,2));
+        $rgb[1]=hexdec(substr($hex,2,2));
+        $rgb[2]=hexdec(substr($hex,4,2));
+        return($rgb);
+    }
+}
diff --git a/content-controllers/text/text.controller.php b/content-controllers/text/text.controller.php
@@ -2,6 +2,8 @@
 
 class TextController implements ContentController
 {
+    public const ctype = 'static';
+
     //returns all extensions registered by this type of content
     public function getRegisteredExtensions(){return array('txt','text','csv');}
 

diff --git a/content-controllers/url/url.controller.php b/content-controllers/url/url.controller.php
@@ -2,6 +2,8 @@
 
 class UrlController implements ContentController
 {
+    public const ctype = 'static';
+
     //returns all extensions registered by this type of content
     public function getRegisteredExtensions(){return array('url');}
     public function handleHash($hash,$url){}

diff --git a/content-controllers/video/video.controller.php b/content-controllers/video/video.controller.php
@@ -2,6 +2,8 @@
 
 class VideoController implements ContentController
 {
+    public const ctype = 'static';
+
     //returns all extensions registered by this type of content
     public function getRegisteredExtensions(){return array('mp4');}