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alwaysblank/cloudinary-rewrite.php

Created January 31, 2020 16:48
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  1. alwaysblank created this gist Jan 31, 2020.
    73 changes: 73 additions & 0 deletions cloudinary-rewrite.php
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,73 @@
    // Put this wherever you like; it just needs to run early enough to hook
    // into these filters.

    function encode_commas($string)
    {
    return str_replace(',', '%2C', $string);
    }

    /**
    * Put Cloudinary URL generation in one place.
    *
    * @param $url
    * @param array $options
    *
    * @return bool|mixed|string|string[]|null
    */
    function rewrite_for_cl($url, array $options = [])
    {
    // The env var here is the Cloudinary API url you can get in the dashboard.
    // It looks something like this:
    // cloudinary://24927894590:b0982nv0su903h89ufhjkfdvnsd@accountname
    $cl_folder = env('development') ? 'testing' : 'images';

    $cl_options = array_merge([
    'quality' => 'auto',
    'resource_type' => 'image',
    'fetch_format' => 'auto',
    'dpr' => 'auto',
    ], $options);

    $wp_upload_dir = wp_get_upload_dir();
    $to_remove = $wp_upload_dir['baseurl'] ?? false;

    if ($to_remove) {
    // Normalize protocol
    $url = str_replace(['https', 'http'], '', $url);
    $to_remove = str_replace(['https', 'http'], '', $to_remove);

    // Turn our local url into our cloudinary directory
    $image_url = str_replace($to_remove, $cl_folder, $url);

    // Encode commas so that Lozad doesn't freak out
    $image_url = encode_commas($image_url);

    return cloudinary_url($image_url, $cl_options);
    }

    return false;
    }

    /**
    * Filter image sources and rewrite them to cloudinary URLs if possible.
    */
    add_filter('wp_get_attachment_image_src', function($image) {
    if ($image && filter_var($image[0], FILTER_VALIDATE_URL)) {
    if ($cl_url = rewrite_for_cl($image[0])) {
    $image[0] = $cl_url;
    }
    }
    return $image;
    }, 10, 1);

    /**
    * Filter srcsets and rewrite them to cloudinary URLs if possible.
    */
    add_filter('wp_calculate_image_srcset', function($sources) {
    foreach ($sources as &$source) {
    if($cl_url = rewrite_for_cl($source['url'])) {
    $source['url'] = encode_commas($cl_url);
    }
    }
    return $sources;
    }, 10, 1);