# All files / src/plugins Plugin.ts

19.6% Statements 10/51
0% Branches 0/12
0% Functions 0/13
20% Lines 10/50

Press n or j to go to the next uncovered block, b, p or k for the previous block.

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
    100
    101
    102
    103
    104
    105
    106
    107
    108
    109
    110
    111
    112
    113
    114
    115
    116
    117
    118
    119
    120
    121
    122
    123
    124
    125
    126
    127
    128
    129
    130
    131
    132
    133
    134
    135
    136
    137
    138
    139
    140
    141
    142
    143
    144
    145
    146
    147
    148
    149
    150
    151
    152
    153
    154
    155
    156
    157
    158
    159
    160
    161
    162
    163
    16410x
    10x
    10x

    10x
    10x
    10x

    10x

    10x

    10x

    10x

     import path from 'path';
    import fs from 'fs-extra';
    import cheerio from 'cheerio';

    import isString from 'lodash/isString';
    import * as logger from '../utils/logger';
    import * as urlUtil from '../utils/urlUtil';
    import type { NodeProcessorConfig } from '../html/NodeProcessor';
    import { NodeOrText } from '../utils/node';

    require('../patches/htmlparser2');

    const _ = { isString };

    const PLUGIN_OUTPUT_SITE_ASSET_FOLDER_NAME = 'plugins';

    export type PluginContext = Record<string, any>;

    export type FrontMatter = Record<string, any>;

    type TagConfigAttributes = {
      name: string,
      isRelative: boolean,
      isSourceFile: boolean
    };

    export type TagConfigs = {
      isSpecial: boolean,
      attributes: TagConfigAttributes[]
    };

    /**
     * Wrapper class around a loaded plugin module
     */
    export class Plugin {
      pluginName: string;
      plugin: {
        beforeSiteGenerate: (...args: any[]) => any;
        getLinks: (pluginContext?: PluginContext, frontmatter?: FrontMatter, content?: string) => string[];
        getScripts: (pluginContext?: PluginContext, frontmatter?: FrontMatter, content?: string) => string[];
        postRender: (pluginContext: PluginContext, frontmatter: FrontMatter, content: string) => string;
        processNode: (pluginContext: PluginContext, node: NodeOrText, config?: NodeProcessorConfig) => string;
        postProcessNode: (pluginContext: PluginContext, node: NodeOrText, config?: NodeProcessorConfig) => string;
        tagConfig: Record<string, TagConfigs>;
      };

      pluginOptions: PluginContext;
      pluginAbsolutePath: string;
      pluginAssetOutputPath: string;

      constructor(pluginName: string, pluginPath: string, pluginOptions: PluginContext, siteOutputPath: string) {
        this.pluginName = pluginName;

        /**
         * The plugin module
         */
        // eslint-disable-next-line global-require,import/no-dynamic-require
        this.plugin = require(pluginPath);

        this.pluginOptions = pluginOptions || {};

        // For resolving plugin asset source paths later
        this.pluginAbsolutePath = path.dirname(pluginPath);
        this.pluginAssetOutputPath = path.join(siteOutputPath, PLUGIN_OUTPUT_SITE_ASSET_FOLDER_NAME,
                                               path.basename(pluginPath, '.js'));
      }

      executeBeforeSiteGenerate() {
        Iif (this.plugin.beforeSiteGenerate) {
          this.plugin.beforeSiteGenerate(this.pluginOptions);
        }
      }

      /**
       * Resolves a resource specified as an attribute in a html asset tag
       * (eg. '<script>' or '<link>') provided by a plugin, and copies said asset
       * into the plugin's asset output folder.
       * Does nothing if the resource is a url.
       * @param assetElementHtml The asset element html, as a string, such as '<script src="...">'
       * @param tagName The name of the resource tag
       * @param attrName The attribute name where the resource is specified in the tag
       * @param baseUrl baseUrl of the site
       * @return String html of the element, with the attribute's asset resolved
       */
      _getResolvedAssetElement(assetElementHtml: string, tagName: string, attrName: string, baseUrl: string) {
        const $ = cheerio.load(assetElementHtml);
        const el = $(`${tagName}[${attrName}]`);

        el.attr(attrName, (_i: any, assetPath: any): string => {
          Iif (!assetPath || !_.isString(assetPath) || urlUtil.isUrl(assetPath)) {
            return assetPath;
          }

          const srcPath = path.resolve(this.pluginAbsolutePath, assetPath);
          const srcBaseName = path.basename(srcPath);

          fs.ensureDir(this.pluginAssetOutputPath)
            .then(() => {
              const outputPath = path.join(this.pluginAssetOutputPath, srcBaseName);
              fs.copySync(srcPath, outputPath, { overwrite: false });
            })
            .catch(err => logger.error(
              `Failed to copy asset ${assetPath} for plugin ${this.pluginName}\n${err}`));

          return path.posix.join(`${baseUrl}/`, PLUGIN_OUTPUT_SITE_ASSET_FOLDER_NAME,
                                 this.pluginName, srcBaseName);
        });

        return $.html();
      }

      /**
       * Collect page content inserted by plugins
       */
      getPageNjkLinksAndScripts(frontmatter: FrontMatter, content: string, baseUrl: string) {
        let links: string[] = [];
        let scripts: string[] = [];

        Iif (this.plugin.getLinks) {
          const pluginLinks = this.plugin.getLinks(this.pluginOptions, frontmatter, content);
          links = pluginLinks.map(
            (linkHtml: string) => this._getResolvedAssetElement(linkHtml, 'link', 'href', baseUrl));
        }

        Iif (this.plugin.getScripts) {
          const pluginScripts = this.plugin.getScripts(this.pluginOptions, frontmatter, content);
          scripts = pluginScripts.map((scriptHtml: string) => this._getResolvedAssetElement(scriptHtml, 'script',
                                                                                            'src', baseUrl));
        }

        return {
          links,
          scripts,
        };
      }

      postRender(frontmatter: FrontMatter, content: string) {
        Iif (this.plugin.postRender) {
          return this.plugin.postRender(this.pluginOptions, frontmatter, content);
        }
        return content;
      }

      processNode(node: NodeOrText, config: NodeProcessorConfig) {
        Iif (!this.plugin.processNode) {
          return;
        }

        this.plugin.processNode(this.pluginOptions, node, config);
      }

      postProcessNode(node: NodeOrText, config: NodeProcessorConfig) {
        Iif (!this.plugin.postProcessNode) {
          return;
        }

        this.plugin.postProcessNode(this.pluginOptions, node, config);
      }

      getTagConfig() {
        return this.plugin.tagConfig;
      }
    }