# All files / src/lib/markdown-it/plugins/markdown-it-block-embed/services VideoServiceBase.js

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     // Copyright (c) Rotorz Limited and portions by original markdown-it-video authors
    // Licensed under the MIT license. See LICENSE file in the project root.

    "use strict";

    function defaultUrlFilter(url, _videoID, _serviceName, _options) {
      return url;
    }

    class VideoServiceBase {

      constructor(name, options, env) {
        this.name = name;
        this.options = Object.assign(this.getDefaultOptions(), options);
        this.env = env;
      }

      getDefaultOptions() {
        return {};
      }

      extractVideoID(reference) {
        return reference;
      }

      getVideoUrl(_videoID) {
        throw new Error("not implemented");
      }

      getFilteredVideoUrl(videoID) {
        let filterUrlDelegate = typeof this.env.options.filterUrl === "function"
            ? this.env.options.filterUrl
            : defaultUrlFilter;
        let videoUrl = this.getVideoUrl(videoID);
        return filterUrlDelegate(videoUrl, this.name, videoID, this.env.options);
      }

      getEmbedCode(videoID) {
        let containerClassNames = [];
        if (this.env.options.containerClassName && this.options.ignoreStyle !== true) {
          containerClassNames.push(this.env.options.containerClassName);
        }

        let escapedServiceName = this.env.md.utils.escapeHtml(this.name);
        containerClassNames.push(this.env.options.serviceClassPrefix + escapedServiceName);

        let containerStyles = [];
        if (this.options.ignoreStyle !== true) {
          containerStyles.push(["position: relative;"]);
          if (this.options.height !== undefined && this.options.width !== undefined) {
            containerStyles.push(`padding-bottom: ${this.options.height / this.options.width * 100}%`);
          }
        }

        let iframeAttributeList = [];
        iframeAttributeList.push([ "type", "text/html" ]);
        iframeAttributeList.push([ "src", this.getFilteredVideoUrl(videoID) ]);
        iframeAttributeList.push([ "frameborder", 0 ]);

        if (this.env.options.outputPlayerSize === true && this.options.ignoreStyle === true) {
          if (this.options.width !== undefined && this.options.width !== null) {
            iframeAttributeList.push([ "width", this.options.width ]);
          }
          if (this.options.height !== undefined && this.options.height !== null) {
            iframeAttributeList.push([ "height", this.options.height ]);
          }
        }

        if (this.env.options.allowFullScreen === true) {
          iframeAttributeList.push([ "webkitallowfullscreen" ]);
          iframeAttributeList.push([ "mozallowfullscreen" ]);
          iframeAttributeList.push([ "allowfullscreen" ]);
        }

        let iframeAttributes = iframeAttributeList
          .map(pair =>
            pair[1] !== undefined
                ? `${pair[0]}="${pair[1]}"`
                : pair[0]
          )
          .join(" ");

        return `<div class="${containerClassNames.join(" ")}" style="${containerStyles.join(" ")}">`
               + `<iframe ${iframeAttributes}></iframe>`
             + `</div>\n`;
      }

    }

    module.exports = VideoServiceBase;