Add tracking JSDoc template and plugins.

README.md

@@ -7,6 +7,7 @@ The packages here are too experimental or too Grow-specific to be shared Woo-wid
 
 - [`/packages/js/generator-grow`](packages/js/generator-grow/README.md) - Yeoman Generator for extension repository boilerplate.
 - [`/packages/js/storybook`](packages/js/storybook/README.md) - Storybook dependencies and basic scripts
+- [`/packages/js/tracking-jsdoc`](packages/js/tracking-jsdoc/README.md) - `jsdoc` plugin to document Tracking Events in markdown
 
 <p align="center">
 	<br/><br/>

packages/js/tracking-jsdoc/README.md

@@ -0,0 +1,84 @@
+# woocommerce-grow-tracking-jsdoc
+
+JSDoc template to report Tracking events to markdown file.
+
+## Usage
+
+0. `npm i jsdoc` and configure jsdoc according to your source code, so the `npx jsdoc ./your/source/` runs successfully.
+1. Install or link this package via npm
+2. Add your `/TRACKING.md` template
+
+   ```md
+   # Usage Tracking
+
+   Some nice general description.
+
+   <woocommerce-grow-tracking-jsdoc></woocommerce-grow-tracking-jsdoc>
+   ```
+3. Generate the docs
+   ```sh
+   jsdoc -r your/source/files/ -t ./node_modules/woocommerce-grow-tracking-jsdoc
+   ```
+
+
+
+## Config
+
+You may add any of the following properties to your JSDoc config (`.jsdocrc.json`) to change those default values:
+```js
+{
+  "templates": {
+    "woocommerce-grow-tracking-jsdoc": {
+      // Path to the markdown file to which the tracking events' docs should be added
+      "path": "TRACKING.md",
+      // Pattern to be used to match the content to be replaced. The groups are respectively: start marker, replaceable content, end marker.
+      "replacement": "(<woocommerce-grow-tracking-jsdoc(?:\\s[^>]*)?>)([\\s\\S]*)(<\\/woocommerce-grow-tracking-jsdoc.*>)"
+    }
+  }
+```
+Then make sure `jsdoc` uses it, by `jsdoc -r your/source/files/ -c .jsdocrc.json`.
+
+## Emitters
+If you would like to add some descriptions to `@fires` or `@emmits` tags, for example to specify what data is attached to the event, add `fires-description` to your plugins list:
+
+```json
+{
+  "plugins": [
+    // To be able to add descriptions to `@fires` & `@emmits`
+    "woocommerce-grow-tracking-jsdoc/fires-description"
+  ],
+  // …
+```
+
+
+## Imported types
+
+If your codebase uses TS-style of importing types `{import('foo').bar}`, you will most probably get an error, like:
+```
+ERROR: Unable to parse a tag's type expression for source file … Invalid type expression "import('foo').bar"
+```
+
+To mitigate that use a `jsdoc-plugin-typescript` plugin to skip those. `npm install --save-dev jsdoc-plugin-typescript` and add this to your config:
+```js
+{
+  "plugins": [
+    "jsdoc-plugin-typescript"
+  ],
+  "typescript": {
+    "moduleRoot": "assets/source" // Path to your module's root directory.
+  }
+  // …
+```
+
+## `~` Alias
+
+If your codebase uses a `.~` or `~` alias for the root directory, you may use `tilde-alias`.
+
+```js
+{
+  "plugins": [
+    "woocommerce-grow-tracking-jsdoc/tilde-alias",
+    "jsdoc-plugin-typescript"
+  ],
+  // …
+```

packages/js/tracking-jsdoc/fires-description.js

@@ -0,0 +1,21 @@
+/**
+ * JSDoc plugin that allows to use descriptions for built-in `@fires` & `@emmits` tags.
+ *
+ * Overwrites the standard definition with `canHaveName: true` option,
+ * and tweaks `applyNamespace` to apply it only to `value.name`.
+ */
+const { applyNamespace } = require( 'jsdoc/name' );
+
+exports.defineTags = function ( dictionary ) {
+	dictionary
+		.defineTag( 'fires', {
+			mustHaveValue: true,
+			canHaveName: true,
+			onTagged( doclet, tag ) {
+				doclet.fires = doclet.fires || [];
+				tag.value.name = applyNamespace( tag.value.name, 'event' );
+				doclet.fires.push( tag.value );
+			},
+		} )
+		.synonym( ' emmits' );
+};

packages/js/tracking-jsdoc/package.json

@@ -0,0 +1,18 @@
+{
+  "name": "woocommerce-grow-tracking-jsdoc",
+  "version": "0.0.1",
+  "description": "JSDoc template to report Tracking events to markdown file",
+  "repository": {
+    "type": "git",
+    "url": "git+ssh://[email protected]/woocommerce/grow.git"
+  },
+  "author": "WooCommerce",
+  "license": "GPL-3.0-or-later",
+  "bugs": {
+    "url": "https://github.com/woocommerce/grow/issues"
+  },
+  "homepage": "https://github.com/woocommerce/grow#readme",
+  "peerDependencies": {
+    "jsdoc": "^3.6.10"
+  }
+}

packages/js/tracking-jsdoc/publish.js

@@ -0,0 +1,132 @@
+const fs = require( 'jsdoc/fs' );
+const env = require( 'jsdoc/env' );
+const path = require( 'jsdoc/path' );
+
+/** @module publish */
+
+// RegExp used to match the replacement. The groups are respectively: start marker, replacable content, end marker.
+const defaultReplacementRegex = /(<woocommerce-grow-tracking-jsdoc(?:\s[^>]*)?>)([\s\S]*)(<\/woocommerce-grow-tracking-jsdoc.*>)/;
+
+const disclaimerStart = `<!---
+Everything below will be automatically generated by \`woocommerce-grow-tracking-jsdoc\`.
+Do not edit it manually!
+-->`;
+const disclaimerEnd = `<!---
+End of \`woocommerce-grow-tracking-jsdoc\`-generated content.
+-->
+`;
+
+/**
+ * Creates MD link to the line of code, where the symbol was defined.
+ *
+ * @param {Object} symbol JSDoc symbol object.
+ * @param {string} readmeDir The absolute path to the directory of README file.
+ */
+function getLineLink( symbol, readmeDir ) {
+	const localLocation =
+		path.relative(
+			readmeDir,
+			path.join( symbol.meta.path, symbol.meta.filename )
+		) +
+		'#L' +
+		symbol.meta.lineno;
+	return `[\`${ symbol.name }\`](${ localLocation })`;
+}
+
+/**
+ * Generate documentation output.
+ *
+ * @param {Object} data - A TaffyDB collection representing
+ *                       all the symbols documented in your code.
+ */
+exports.publish = function ( data ) {
+	const {
+		conf: {
+			templates: {
+				'woocommerce-grow-tracking-jsdoc': {
+					path: readmePath = 'TRACKING.md',
+					replacement,
+				} = {},
+			} = {},
+		} = {},
+		pwd,
+	} = env;
+
+	const readmeDir = path.join( pwd, path.dirname( readmePath ) );
+	const replacementRegex = replacement
+		? new RegExp( replacement )
+		: defaultReplacementRegex;
+
+	let mdResult = '';
+
+	data( { kind: 'event' } )
+		.order( 'name' )
+		.each( ( symbol ) => {
+			// Build the event title with the link to its source.
+			mdResult += `\n### ${ getLineLink( symbol, readmeDir ) }\n`;
+			// description
+			mdResult += ( symbol.description || '' ) + '\n';
+			// Build properites table.
+			if ( symbol.properties ) {
+				mdResult += `#### Properties
+| name | type | description |
+| ---- | ---- | ----------- |\n`;
+				symbol.properties.forEach( ( property ) => {
+					// Escape `|` for markdown table.
+					const type = property.type.parsedType.typeExpression.replace(
+						/\|/g,
+						'\\|'
+					);
+					const description = property.description.replace(
+						/\|/g,
+						'\\|'
+					);
+					mdResult += `\`${
+						property.name
+					}\` | \`${ type }\` | ${ description.replace(
+						/\s*\n\s*/g,
+						' <br> '
+					) }\n`;
+				} );
+			}
+
+			// Find all places that fires the event.
+			const emitters = new Map();
+			// TaffyDB#has is buggy https://github.com/typicaljoe/taffydb/issues/19, so let's filter it manually.
+			data( { fires: { isArray: true } } ).each( ( emitter ) => {
+				const firesCurrent = emitter.fires.filter(
+					( fires ) => fires.name === 'event:' + symbol.name
+				);
+				if ( firesCurrent.length ) {
+					emitters.set( emitter, firesCurrent );
+				}
+			} );
+			if ( emitters.size ) {
+				mdResult += `#### Emitters\n`;
+				emitters.forEach( ( fires, emitter ) => {
+					mdResult += '- ' + getLineLink( emitter, readmeDir );
+					if ( fires.length > 1 ) {
+						mdResult +=
+							`\n` +
+							fires
+								.map(
+									( evt ) => `	- ${ evt.description || '' }`
+								)
+								.join( '\n' );
+					} else if ( fires[ 0 ] && fires[ 0 ].description ) {
+						mdResult += ' ' + fires[ 0 ].description;
+					}
+					mdResult += '\n';
+				} );
+			}
+		} );
+
+	let readme = fs.readFileSync( readmePath, 'utf8' );
+	// Replace the marker with generated content.
+	readme = readme.replace(
+		replacementRegex,
+		`$1\n${ disclaimerStart }\n${ mdResult }\n${ disclaimerEnd }$3`
+	);
+	fs.writeFileSync( readmePath, readme, 'utf8' );
+	return mdResult;
+};

packages/js/tracking-jsdoc/tilde-alias.js

@@ -0,0 +1,5 @@
+exports.handlers = {
+	beforeParse( e ) {
+		e.source = e.source.replace( /(import\(["'])\.?~\//g, `$1` );
+	},
+};