src/server/utils/generate-manifest-base64.ts

   1 import { readFile } from "fs/promises";
   2 import { GetSiteResponse } from "lemmy-js-client";
   3 import path from "path";
   4 import sharp from "sharp";
   5 import { getHttpBaseExternal } from "../../shared/env";
   6 import { fetchIconPng } from "./fetch-icon-png";
   7
   8 const iconSizes = [72, 96, 144, 192, 512];
   9
  10 const defaultLogoPathDirectory = path.join(
  11   process.cwd(),
  12   "dist",
  13   "assets",
  14   "icons"
  15 );
  16
  17 export async function generateManifestBase64({
  18   my_user,
  19   site_view: {
  20     site,
  21     local_site: { community_creation_admin_only },
  22   },
  23 }: GetSiteResponse) {
  24   const url = getHttpBaseExternal();
  25
  26   const icon = site.icon ? await fetchIconPng(site.icon) : null;
  27
  28   const manifest = {
  29     name: site.name,
  30     description: site.description ?? "A link aggregator for the fediverse",
  31     start_url: url,
  32     scope: url,
  33     display: "standalone",
  34     id: "/",
  35     background_color: "#222222",
  36     theme_color: "#222222",
  37     icons: await Promise.all(
  38       iconSizes.map(async size => {
  39         let src = await readFile(
  40           path.join(defaultLogoPathDirectory, `icon-${size}x${size}.png`)
  41         ).then(buf => buf.toString("base64"));
  42
  43         if (icon) {
  44           src = await sharp(icon)
  45             .resize(size, size)
  46             .png()
  47             .toBuffer()
  48             .then(buf => buf.toString("base64"));
  49         }
  50
  51         return {
  52           sizes: `${size}x${size}`,
  53           type: "image/png",
  54           src: `data:image/png;base64,${src}`,
  55           purpose: "any maskable",
  56         };
  57       })
  58     ),
  59     shortcuts: [
  60       {
  61         name: "Search",
  62         short_name: "Search",
  63         description: "Perform a search.",
  64         url: "/search",
  65       },
  66       {
  67         name: "Communities",
  68         url: "/communities",
  69         short_name: "Communities",
  70         description: "Browse communities",
  71       },
  72     ]
  73       .concat(
  74         my_user
  75           ? [
  76               {
  77                 name: "Create Post",
  78                 url: "/create_post",
  79                 short_name: "Create Post",
  80                 description: "Create a post.",
  81               },
  82             ]
  83           : []
  84       )
  85       .concat(
  86         my_user?.local_user_view.person.admin || !community_creation_admin_only
  87           ? [
  88               {
  89                 name: "Create Community",
  90                 url: "/create_community",
  91                 short_name: "Create Community",
  92                 description: "Create a community",
  93               },
  94             ]
  95           : []
  96       ),
  97     related_applications: [
  98       {
  99         platform: "f-droid",
 100         url: "https://f-droid.org/packages/com.jerboa/",
 101         id: "com.jerboa",
 102       },
 103     ],
 104   };
 105
 106   return Buffer.from(JSON.stringify(manifest)).toString("base64");
 107 }