add getTileJson method to PMTiles class [#239, #247] (#453)

* add getTileJson method to PMTiles class [#239, #247]
* update docs related to FetchSource and headers [#397]

serverless/aws/src/index.ts

@@ -12,7 +12,7 @@ import {
   Source,
   TileType,
 } from "../../../js/index";
-import { pmtiles_path, tileJSON, tile_path } from "../../shared/index";
+import { pmtiles_path, tile_path } from "../../shared/index";
 
 import { createHash } from "crypto";
 import zlib from "zlib";
@@ -177,15 +177,13 @@ export const handlerRaw = async (
       }
       headers["Content-Type"] = "application/json";
 
-      const t = tileJSON(
-        header,
-        await p.getMetadata(),
-        process.env.PUBLIC_HOSTNAME ||
+      const t = await p.getTileJson(
+        `https://${
+          process.env.PUBLIC_HOSTNAME ||
           event.headers["x-distribution-domain-name"] ||
-          "",
-        name
+          ""
+        }/${name}`
       );
-
       return apiResp(200, JSON.stringify(t), false, headers);
     }
 

serverless/cloudflare/package.json

@@ -14,7 +14,7 @@
     "deploy": "wrangler deploy",
     "test": "tsx ../shared/index.test.ts",
     "tsc": "tsc --watch",
-    "build": "wrangler publish --outdir dist --dry-run",
+    "build": "wrangler deploy --outdir dist --dry-run",
     "biome": "biome check --config-path=../../js/ src/index.ts --apply",
     "biome-check": "biome check --config-path=../../js src/index.ts"
   }

serverless/cloudflare/src/index.ts

@@ -7,7 +7,7 @@ import {
   Source,
   TileType,
 } from "../../../js/index";
-import { pmtiles_path, tileJSON, tile_path } from "../../shared/index";
+import { pmtiles_path, tile_path } from "../../shared/index";
 
 interface Env {
   // biome-ignore lint: config name
@@ -159,14 +159,9 @@ export default {
 
       if (!tile) {
         cacheableHeaders.set("Content-Type", "application/json");
-
-        const t = tileJSON(
-          pHeader,
-          await p.getMetadata(),
-          env.PUBLIC_HOSTNAME || url.hostname,
-          name
+        const t = await p.getTileJson(
+          `https://${env.PUBLIC_HOSTNAME || url.hostname}/${name}`
         );
-
         return cacheableResponse(JSON.stringify(t), cacheableHeaders, 200);
       }
 

serverless/shared/index.ts

@@ -1,5 +1,3 @@
-import { Header, TileType } from "../../js/index";
-
 export const pmtiles_path = (name: string, setting?: string): string => {
   if (setting) {
     return setting.replaceAll("{name}", name);
@@ -35,39 +33,4 @@ export const tile_path = (
   }
 
   return { ok: false, name: "", tile: [0, 0, 0], ext: "" };
-};
-
-export const tileJSON = (
-  header: Header,
-  metadata: any,
-  hostname: string,
-  tileset_name: string
-) => {
-  let ext = "";
-  if (header.tileType === TileType.Mvt) {
-    ext = ".mvt";
-  } else if (header.tileType === TileType.Png) {
-    ext = ".png";
-  } else if (header.tileType === TileType.Jpeg) {
-    ext = ".jpg";
-  } else if (header.tileType === TileType.Webp) {
-    ext = ".webp";
-  } else if (header.tileType === TileType.Avif) {
-    ext = ".avif";
-  }
-
-  return {
-    tilejson: "3.0.0",
-    scheme: "xyz",
-    tiles: ["https://" + hostname + "/" + tileset_name + "/{z}/{x}/{y}" + ext],
-    vector_layers: metadata.vector_layers,
-    attribution: metadata.attribution,
-    description: metadata.description,
-    name: metadata.name,
-    version: metadata.version,
-    bounds: [header.minLon, header.minLat, header.maxLon, header.maxLat],
-    center: [header.centerLon, header.centerLat, header.centerZoom],
-    minzoom: header.minZoom,
-    maxzoom: header.maxZoom,
-  };
-};
+};