From cda388bd81bad91c2b10673378e0b50320b725c4 Mon Sep 17 00:00:00 2001
From: Kirill Stryaponov <stryaponoff@gmail.com>
Date: Wed, 21 Feb 2024 23:51:55 +0600
Subject: [PATCH] Add public API (#20)

Co-authored-by: Chemi Atlow <chemi@atlow.co.il>
---
 README.md                     | 14 ++++++++++++++
 src/index.ts                  | 15 ++++++++++++++-
 src/types/generatedWebfont.ts |  6 ++++++
 src/types/publicApi.ts        |  5 +++++
 4 files changed, 39 insertions(+), 1 deletion(-)
 create mode 100644 src/types/generatedWebfont.ts
 create mode 100644 src/types/publicApi.ts

diff --git a/README.md b/README.md
index d9d177f..fc560d6 100644
--- a/README.md
+++ b/README.md
@@ -249,3 +249,17 @@ The plugin has an API consisting of one required parameter and multiple optional
     -   woff - [ttf2woff](https://github.com/fontello/ttf2woff).
     -   eot - [ttf2eot](https://github.com/fontello/ttf2eot).
 -   See [webfonts-generator#formatoptions](https://github.com/vusion/webfonts-generator#formatoptions)
+
+## Public API
+
+The plugin exposes a public API that can be used inside another plugins using [Rollup inter-plugin communication mechanism](https://rollupjs.org/plugin-development/#inter-plugin-communication).
+
+Currently available methods:
+
+### getGeneratedWebfonts
+
+-   **returns**: `Array<{ type: 'svg' | 'ttf' | 'woff2' | 'woff' | 'eot', href: string }>`
+-   **description**
+    -   `type` - a font format generated by a plugin
+    -   `href` - a path to a generated font
+-   [This repo](https://github.com/stryaponoff/vite-plugin-preload-webfont) contains the usage example.
diff --git a/src/index.ts b/src/index.ts
index c35eeaf..0e548ae 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -5,6 +5,8 @@ import { parseOptions, parseFiles } from './optionParser';
 import type { Plugin, ModuleGraph, ModuleNode } from 'vite';
 import type { GeneratedFontTypes, WebfontsGeneratorResult } from '@vusion/webfonts-generator';
 import type { IconPluginOptions } from './optionParser';
+import type { GeneratedWebfont } from './types/generatedWebfont';
+import type { PublicApi } from './types/publicApi';
 
 const ac = new AbortController();
 const webfontGenerator = promisify(_webfontGenerator);
@@ -17,13 +19,14 @@ const RESOLVED_VIRTUAL_MODULE_ID = `\0${VIRTUAL_MODULE_ID}`;
  * The plugin uses {@link https://github.com/vusion/webfonts-generator/ webfonts-generator} package to create fonts in any format.
  * It also generates CSS files that allow using the icons directly in your HTML output, using CSS classes per-icon.
  */
-export function viteSvgToWebfont<T extends GeneratedFontTypes = GeneratedFontTypes>(options: IconPluginOptions<T>): Plugin {
+export function viteSvgToWebfont<T extends GeneratedFontTypes = GeneratedFontTypes>(options: IconPluginOptions<T>): Plugin<PublicApi> {
     const processedOptions = parseOptions(options);
     let isBuild: boolean;
     let fileRefs: { [Ref in T]: string } | undefined;
     let _moduleGraph: ModuleGraph;
     let _reloadModule: undefined | ((module: ModuleNode) => void);
     let generatedFonts: undefined | Pick<WebfontsGeneratorResult<T>, 'generateCss' | 'generateHtml' | T>;
+    const generatedWebfonts: GeneratedWebfont[] = [];
 
     const generate = async (updateFiles?: boolean) => {
         if (updateFiles) {
@@ -54,6 +57,11 @@ export function viteSvgToWebfont<T extends GeneratedFontTypes = GeneratedFontTyp
     return {
         name: 'vite-svg-2-webfont',
         enforce: 'pre',
+        api: {
+            getGeneratedWebfonts(): GeneratedWebfont[] {
+                return generatedWebfonts;
+            },
+        },
         configResolved(_config) {
             isBuild = _config.command === 'build';
         },
@@ -85,6 +93,10 @@ export function viteSvgToWebfont<T extends GeneratedFontTypes = GeneratedFontTyp
                     type,
                     `/${this.getFileName(this.emitFile({ type: 'asset', fileName: `assets/${processedOptions.fontName}-${guid()}.${type}`, source: generatedFonts?.[type] }))}`,
                 ]);
+
+                emitted.forEach(([type, href]) => {
+                    generatedWebfonts.push({ type, href });
+                });
                 fileRefs = Object.fromEntries(emitted) as { [Ref in T]: string };
             }
         },
@@ -112,6 +124,7 @@ export function viteSvgToWebfont<T extends GeneratedFontTypes = GeneratedFontTyp
     };
 }
 export default viteSvgToWebfont;
+export { type GeneratedWebfont, type PublicApi };
 
 /**
  * Paths of default templates available for use.
diff --git a/src/types/generatedWebfont.ts b/src/types/generatedWebfont.ts
new file mode 100644
index 0000000..d37faf3
--- /dev/null
+++ b/src/types/generatedWebfont.ts
@@ -0,0 +1,6 @@
+import type { GeneratedFontTypes } from '@vusion/webfonts-generator';
+
+export type GeneratedWebfont = {
+    type: GeneratedFontTypes;
+    href: string;
+};
diff --git a/src/types/publicApi.ts b/src/types/publicApi.ts
new file mode 100644
index 0000000..9380abb
--- /dev/null
+++ b/src/types/publicApi.ts
@@ -0,0 +1,5 @@
+import type { GeneratedWebfont } from './generatedWebfont';
+
+export interface PublicApi {
+    getGeneratedWebfonts(): GeneratedWebfont[];
+}