mirror of
https://github.com/protomaps/PMTiles.git
synced 2026-02-04 02:41:09 +00:00
add vtfilter package that depends on AWS impl
This commit is contained in:
Brandon Liu
1
serverless/vtfilter/.gitignore
vendored
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1
serverless/vtfilter/.gitignore
vendored
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@@ -0,0 +1 @@
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dist
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BIN
serverless/vtfilter/fixtures/sample.pbf
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BIN
serverless/vtfilter/fixtures/sample.pbf
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Binary file not shown.
21
serverless/vtfilter/index.ts
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21
serverless/vtfilter/index.ts
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@@ -0,0 +1,21 @@
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import {
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Context,
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APIGatewayProxyResult,
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APIGatewayProxyEventV2,
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} from "aws-lambda";
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import { TileType } from "../../js/index";
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import { handlerRaw } from "../aws/src/index";
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import { parseAttributes, vtfilter } from "./vtfilter";
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export const handler = async (
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event: APIGatewayProxyEventV2,
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context: Context
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): Promise<APIGatewayProxyResult> => {
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let attributes = event.queryStringParameters?.attributes;
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function tilePostprocess(a: ArrayBuffer, t: TileType) {
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return vtfilter(new Uint8Array(a), attributes);
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}
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return handlerRaw(event, context, tilePostprocess);
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};
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855
serverless/vtfilter/package-lock.json
generated
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855
serverless/vtfilter/package-lock.json
generated
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@@ -0,0 +1,855 @@
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{
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"name": "vtfilter",
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"lockfileVersion": 2,
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"requires": true,
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"": {
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"dependencies": {
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"@mapbox/vector-tile": "^1.3.1",
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"pbf": "^3.2.1"
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},
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"devDependencies": {
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"@types/aws-lambda": "^8.10.109",
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"@types/mapbox__vector-tile": "^1.3.0",
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"dev": true,
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"esbuild-linux-s390x": {
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"dev": true,
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"esbuild-netbsd-64": {
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"dev": true,
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"esbuild-openbsd-64": {
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"dev": true,
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"esbuild-runner": {
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"dev": true,
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"requires": {
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"source-map-support": "0.5.19",
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"tslib": "2.3.1"
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"resolved": "https://registry.npmjs.org/esbuild-sunos-64/-/esbuild-sunos-64-0.15.7.tgz",
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"dev": true,
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"optional": true
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},
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"esbuild-windows-32": {
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"version": "0.15.7",
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"resolved": "https://registry.npmjs.org/esbuild-windows-32/-/esbuild-windows-32-0.15.7.tgz",
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"dev": true,
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"optional": true
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},
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"esbuild-windows-64": {
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"version": "0.15.7",
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"resolved": "https://registry.npmjs.org/esbuild-windows-64/-/esbuild-windows-64-0.15.7.tgz",
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"dev": true,
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"optional": true
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"esbuild-windows-arm64": {
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"resolved": "https://registry.npmjs.org/esbuild-windows-arm64/-/esbuild-windows-arm64-0.15.7.tgz",
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"integrity": "sha512-R06nmqBlWjKHddhRJYlqDd3Fabx9LFdKcjoOy08YLimwmsswlFBJV4rXzZCxz/b7ZJXvrZgj8DDv1ewE9+StMw==",
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"dev": true,
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"optional": true
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"ieee754": {
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"version": "1.2.1",
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"resolved": "https://registry.npmjs.org/ieee754/-/ieee754-1.2.1.tgz",
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"integrity": "sha512-dcyqhDvX1C46lXZcVqCpK+FtMRQVdIMN6/Df5js2zouUsqG7I6sFxitIC+7KYK29KdXOLHdu9zL4sFnoVQnqaA=="
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},
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"pbf": {
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"version": "3.2.1",
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"resolved": "https://registry.npmjs.org/pbf/-/pbf-3.2.1.tgz",
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"integrity": "sha512-ClrV7pNOn7rtmoQVF4TS1vyU0WhYRnP92fzbfF75jAIwpnzdJXf8iTd4CMEqO4yUenH6NDqLiwjqlh6QgZzgLQ==",
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"requires": {
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"ieee754": "^1.1.12",
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"resolve-protobuf-schema": "^2.1.0"
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}
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"protocol-buffers-schema": {
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"version": "3.6.0",
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"resolved": "https://registry.npmjs.org/protocol-buffers-schema/-/protocol-buffers-schema-3.6.0.tgz",
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"integrity": "sha512-TdDRD+/QNdrCGCE7v8340QyuXd4kIWIgapsE2+n/SaGiSSbomYl4TjHlvIoCWRpE7wFt02EpB35VVA2ImcBVqw=="
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},
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"resolve-protobuf-schema": {
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"version": "2.1.0",
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"resolved": "https://registry.npmjs.org/resolve-protobuf-schema/-/resolve-protobuf-schema-2.1.0.tgz",
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"integrity": "sha512-kI5ffTiZWmJaS/huM8wZfEMer1eRd7oJQhDuxeCLe3t7N7mX3z94CN0xPxBQxFYQTSNz9T0i+v6inKqSdK8xrQ==",
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"requires": {
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"protocol-buffers-schema": "^3.3.1"
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}
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},
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"source-map": {
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"version": "0.6.1",
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"resolved": "https://registry.npmjs.org/source-map/-/source-map-0.6.1.tgz",
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"integrity": "sha512-UjgapumWlbMhkBgzT7Ykc5YXUT46F0iKu8SGXq0bcwP5dz/h0Plj6enJqjz1Zbq2l5WaqYnrVbwWOWMyF3F47g==",
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"dev": true
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},
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"source-map-support": {
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"version": "0.5.19",
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"resolved": "https://registry.npmjs.org/source-map-support/-/source-map-support-0.5.19.tgz",
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"integrity": "sha512-Wonm7zOCIJzBGQdB+thsPar0kYuCIzYvxZwlBa87yi/Mdjv7Tip2cyVbLj5o0cFPN4EVkuTwb3GDDyUx2DGnGw==",
|
||||
"dev": true,
|
||||
"requires": {
|
||||
"buffer-from": "^1.0.0",
|
||||
"source-map": "^0.6.0"
|
||||
}
|
||||
},
|
||||
"tslib": {
|
||||
"version": "2.3.1",
|
||||
"resolved": "https://registry.npmjs.org/tslib/-/tslib-2.3.1.tgz",
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"integrity": "sha512-77EbyPPpMz+FRFRuAFlWMtmgUWGe9UOG2Z25NqCwiIjRhOf5iKGuzSe5P2w1laq+FkRy4p+PCuVkJSGkzTEKVw==",
|
||||
"dev": true
|
||||
},
|
||||
"typescript": {
|
||||
"version": "4.8.3",
|
||||
"resolved": "https://registry.npmjs.org/typescript/-/typescript-4.8.3.tgz",
|
||||
"integrity": "sha512-goMHfm00nWPa8UvR/CPSvykqf6dVV8x/dp0c5mFTMTIu0u0FlGWRioyy7Nn0PGAdHxpJZnuO/ut+PpQ8UiHAig==",
|
||||
"dev": true
|
||||
}
|
||||
}
|
||||
}
|
||||
20
serverless/vtfilter/package.json
Normal file
20
serverless/vtfilter/package.json
Normal file
@@ -0,0 +1,20 @@
|
||||
{
|
||||
"dependencies": {
|
||||
"@mapbox/vector-tile": "^1.3.1",
|
||||
"pbf": "^3.2.1"
|
||||
},
|
||||
"devDependencies": {
|
||||
"@types/aws-lambda": "^8.10.109",
|
||||
"@types/mapbox__vector-tile": "^1.3.0",
|
||||
"@types/node": "^18.11.10",
|
||||
"@types/pbf": "^3.0.2",
|
||||
"esbuild": "^0.15.7",
|
||||
"esbuild-runner": "^2.2.1",
|
||||
"typescript": "^4.8.3"
|
||||
},
|
||||
"scripts": {
|
||||
"test": "node -r esbuild-runner/register vtfilter.test.ts",
|
||||
"tsc": "tsc --noEmit --watch",
|
||||
"build": "esbuild index.ts --target=es2020 --outfile=dist/index.mjs --format=esm --bundle --platform=node --target=node18 --external:@aws-sdk/client-s3 --external:@aws-sdk/node-http-handler --banner:js=//$(git describe --always) && cd dist && zip lambda_function.zip index.mjs"
|
||||
}
|
||||
}
|
||||
16
serverless/vtfilter/tsconfig.json
Normal file
16
serverless/vtfilter/tsconfig.json
Normal file
@@ -0,0 +1,16 @@
|
||||
{
|
||||
"compilerOptions": {
|
||||
"target": "es2021",
|
||||
"strict": true,
|
||||
"preserveConstEnums": true,
|
||||
"noEmit": true,
|
||||
"sourceMap": false,
|
||||
"module": "es2022",
|
||||
"moduleResolution": "node",
|
||||
"esModuleInterop": true,
|
||||
"skipLibCheck": true,
|
||||
"forceConsistentCasingInFileNames": true,
|
||||
"isolatedModules": true
|
||||
},
|
||||
"exclude": ["node_modules"]
|
||||
}
|
||||
107
serverless/vtfilter/vtfilter.test.ts
Normal file
107
serverless/vtfilter/vtfilter.test.ts
Normal file
@@ -0,0 +1,107 @@
|
||||
import { test } from "node:test";
|
||||
import assert from "node:assert";
|
||||
|
||||
import { vtfilter, parseAttributes } from "./vtfilter";
|
||||
|
||||
import fs from "fs";
|
||||
import { VectorTile } from "@mapbox/vector-tile";
|
||||
import Protobuf from "pbf";
|
||||
|
||||
test("basic attribute filter globals", () => {
|
||||
let result = parseAttributes("attr1");
|
||||
assert(result.names.has("attr1"));
|
||||
assert.strictEqual(result.names.size, 1);
|
||||
|
||||
result = parseAttributes("attr1,attr2");
|
||||
assert(result.names.has("attr1"));
|
||||
assert(result.names.has("attr2"));
|
||||
assert.strictEqual(result.names.size, 2);
|
||||
|
||||
result = parseAttributes("attr\\:withcolon");
|
||||
assert(result.names.has("attr:withcolon"));
|
||||
assert.strictEqual(result.names.size, 1);
|
||||
|
||||
result = parseAttributes("attr\\,withcomma");
|
||||
assert(result.names.has("attr,withcomma"));
|
||||
assert.strictEqual(result.names.size, 1);
|
||||
});
|
||||
|
||||
test("basic attribute filter by layer", () => {
|
||||
let result = parseAttributes("layer1:attr1");
|
||||
assert.strictEqual(result.names.size, 0);
|
||||
assert.strictEqual(result.byLayer.get("layer1")!.size, 1);
|
||||
assert(result.byLayer.get("layer1")!.has("attr1"));
|
||||
|
||||
result = parseAttributes("attr1,layer1:attr2,layer1:attr3,layer2:attr4");
|
||||
assert.strictEqual(result.names.size, 1);
|
||||
assert(result.names.has("attr1"));
|
||||
assert.strictEqual(result.byLayer.get("layer1")!.size, 2);
|
||||
assert(result.byLayer.get("layer1")!.has("attr2"));
|
||||
assert(result.byLayer.get("layer1")!.has("attr3"));
|
||||
assert.strictEqual(result.byLayer.get("layer2")!.size, 1);
|
||||
assert(result.byLayer.get("layer2")!.has("attr4"));
|
||||
|
||||
result = parseAttributes(
|
||||
"layer\\,withcomma\\:withcolon:attr\\,withcomma\\:withcolon"
|
||||
);
|
||||
assert.strictEqual(result.byLayer.get("layer,withcomma:withcolon")!.size, 1);
|
||||
assert(
|
||||
result.byLayer
|
||||
.get("layer,withcomma:withcolon")!
|
||||
.has("attr,withcomma:withcolon")
|
||||
);
|
||||
});
|
||||
|
||||
test("malformed input", () => {
|
||||
let result = parseAttributes(",");
|
||||
assert.strictEqual(result.names.size, 0);
|
||||
result = parseAttributes(":");
|
||||
assert.strictEqual(result.names.size, 0);
|
||||
result = parseAttributes("attr:too:manycolons");
|
||||
assert.strictEqual(result.names.size, 0);
|
||||
assert.strictEqual(result.byLayer.get("attr")!.size, 1);
|
||||
assert(result.byLayer.get("attr")!.has("too"));
|
||||
});
|
||||
|
||||
test("1:1", () => {
|
||||
const data = fs.readFileSync("fixtures/sample.pbf");
|
||||
let result = vtfilter(data, undefined);
|
||||
assert(result === data);
|
||||
result = vtfilter(data, "*");
|
||||
assert(result === data);
|
||||
|
||||
let orig = new VectorTile(new Protobuf(data));
|
||||
result = vtfilter(data, "*,extra_key_to_make_shaving_run");
|
||||
let out = new VectorTile(new Protobuf(result));
|
||||
|
||||
let orig_values = [];
|
||||
let out_values = [];
|
||||
for (let layername in orig.layers) {
|
||||
assert.strictEqual(
|
||||
out.layers[layername].length,
|
||||
orig.layers[layername].length
|
||||
);
|
||||
for (var i = 0; i < orig.layers[layername].length; i++) {
|
||||
let orig_feature = orig.layers[layername].feature(i);
|
||||
let out_feature = out.layers[layername].feature(i);
|
||||
orig_values.push(orig_feature.properties);
|
||||
orig_values.push(orig_feature.loadGeometry());
|
||||
out_values.push(out_feature.properties);
|
||||
out_values.push(out_feature.loadGeometry());
|
||||
}
|
||||
}
|
||||
assert.deepEqual(orig_values, out_values);
|
||||
});
|
||||
|
||||
test("filter specific layer", () => {
|
||||
const data = fs.readFileSync("fixtures/sample.pbf");
|
||||
|
||||
const result = vtfilter(data, "water:natural,landuse:*");
|
||||
let out = new VectorTile(new Protobuf(result));
|
||||
assert.strictEqual(Object.keys(out.layers).length, 8);
|
||||
|
||||
for (var i = 0; i < out.layers["water"].length; i++) {
|
||||
let feature = out.layers["water"].feature(i);
|
||||
assert(Object.keys(feature.properties).length < 2);
|
||||
}
|
||||
});
|
||||
226
serverless/vtfilter/vtfilter.ts
Normal file
226
serverless/vtfilter/vtfilter.ts
Normal file
@@ -0,0 +1,226 @@
|
||||
import Protobuf from "pbf";
|
||||
import {
|
||||
VectorTile,
|
||||
VectorTileFeature,
|
||||
VectorTileLayer,
|
||||
} from "@mapbox/vector-tile";
|
||||
|
||||
interface Attributes {
|
||||
names: Set<string>;
|
||||
byLayer: Map<string, Set<string>>;
|
||||
}
|
||||
|
||||
function unescape(s: string): string {
|
||||
return s.replace("\\,", ",").replace("\\:", ":");
|
||||
}
|
||||
|
||||
export function parseAttributes(s: string): Attributes {
|
||||
let result: Attributes = {
|
||||
names: new Set<string>(),
|
||||
byLayer: new Map<string, Set<string>>(),
|
||||
};
|
||||
|
||||
for (let attr_s of s.split(/(?<!\\),/)) {
|
||||
let parts = attr_s.split(/(?<!\\):/);
|
||||
if (parts.length == 1) {
|
||||
if (parts[0] === "") continue;
|
||||
result.names.add(unescape(parts[0]));
|
||||
} else {
|
||||
let layername = unescape(parts[0]);
|
||||
let colname = unescape(parts[1]);
|
||||
if (!result.byLayer.has(layername)) {
|
||||
result.byLayer.set(layername, new Set<string>());
|
||||
}
|
||||
result.byLayer.get(layername)!.add(colname);
|
||||
}
|
||||
}
|
||||
return result;
|
||||
}
|
||||
|
||||
function writeValue(value: number | boolean | string, pbf?: Protobuf) {
|
||||
if (typeof value === "string") {
|
||||
pbf!.writeStringField(1, value);
|
||||
} else if (typeof value === "boolean") {
|
||||
pbf!.writeBooleanField(7, value);
|
||||
} else if (typeof value === "number") {
|
||||
if (value % 1 !== 0) {
|
||||
pbf!.writeDoubleField(3, value);
|
||||
} else if (value < 0) {
|
||||
pbf!.writeSVarintField(6, value);
|
||||
} else {
|
||||
pbf!.writeVarintField(5, value);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function writeProperties(context: LayerWriteContext, pbf?: Protobuf) {
|
||||
var feature = context.feature;
|
||||
var names = context.names;
|
||||
var forLayer = context.forLayer;
|
||||
|
||||
var keys = context.keys;
|
||||
var values = context.values;
|
||||
var keycache = context.keycache;
|
||||
var valuecache = context.valuecache;
|
||||
|
||||
for (var key in feature!.properties) {
|
||||
if (
|
||||
names.has("*") ||
|
||||
names.has(key) ||
|
||||
forLayer.has("*") ||
|
||||
forLayer.has(key)
|
||||
) {
|
||||
var value = feature!.properties[key];
|
||||
|
||||
var keyIndex = keycache[key];
|
||||
if (value === null) continue; // don't encode null value properties
|
||||
|
||||
if (typeof keyIndex === "undefined") {
|
||||
keys.push(key);
|
||||
keyIndex = keys.length - 1;
|
||||
keycache[key] = keyIndex;
|
||||
}
|
||||
pbf!.writeVarint(keyIndex);
|
||||
|
||||
var type = typeof value;
|
||||
if (type !== "string" && type !== "boolean" && type !== "number") {
|
||||
value = JSON.stringify(value);
|
||||
}
|
||||
var valueKey = type + ":" + value;
|
||||
var valueIndex = valuecache[valueKey];
|
||||
if (typeof valueIndex === "undefined") {
|
||||
values.push(value);
|
||||
valueIndex = values.length - 1;
|
||||
valuecache[valueKey] = valueIndex;
|
||||
}
|
||||
pbf!.writeVarint(valueIndex);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function command(cmd: number, length: number) {
|
||||
return (length << 3) + (cmd & 0x7);
|
||||
}
|
||||
|
||||
function zigzag(num: number) {
|
||||
return (num << 1) ^ (num >> 31);
|
||||
}
|
||||
|
||||
function writeGeometry(feature: VectorTileFeature, pbf?: Protobuf) {
|
||||
var geometry = feature.loadGeometry();
|
||||
var type = feature.type;
|
||||
var x = 0;
|
||||
var y = 0;
|
||||
var rings = geometry.length;
|
||||
for (var r = 0; r < rings; r++) {
|
||||
var ring = geometry[r];
|
||||
var count = 1;
|
||||
if (type === 1) {
|
||||
count = ring.length;
|
||||
}
|
||||
pbf!.writeVarint(command(1, count)); // moveto
|
||||
// do not write polygon closing path as lineto
|
||||
var lineCount = type === 3 ? ring.length - 1 : ring.length;
|
||||
for (var i = 0; i < lineCount; i++) {
|
||||
if (i === 1 && type !== 1) {
|
||||
pbf!.writeVarint(command(2, lineCount - 1)); // lineto
|
||||
}
|
||||
var dx = ring[i].x - x;
|
||||
var dy = ring[i].y - y;
|
||||
pbf!.writeVarint(zigzag(dx));
|
||||
pbf!.writeVarint(zigzag(dy));
|
||||
x += dx;
|
||||
y += dy;
|
||||
}
|
||||
if (type === 3) {
|
||||
pbf!.writeVarint(command(7, 1)); // closepath
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function writeFeature(context: LayerWriteContext, pbf?: Protobuf) {
|
||||
var feature = context.feature!;
|
||||
|
||||
if (feature.id !== undefined) {
|
||||
pbf!.writeVarintField(1, feature.id);
|
||||
}
|
||||
|
||||
pbf!.writeMessage(2, writeProperties, context);
|
||||
pbf!.writeVarintField(3, feature.type);
|
||||
pbf!.writeMessage(4, writeGeometry, feature);
|
||||
}
|
||||
|
||||
function writeLayer(
|
||||
l: [VectorTileLayer, Set<string>, Set<string>],
|
||||
sink?: Protobuf
|
||||
) {
|
||||
sink = sink!;
|
||||
let layer = l[0];
|
||||
|
||||
sink.writeVarintField(15, layer.version || 1);
|
||||
sink.writeStringField(1, layer.name || "");
|
||||
sink.writeVarintField(5, layer.extent || 4096);
|
||||
|
||||
var i;
|
||||
var context: LayerWriteContext = {
|
||||
keys: [],
|
||||
values: [],
|
||||
keycache: {},
|
||||
valuecache: {},
|
||||
feature: undefined,
|
||||
names: l[1],
|
||||
forLayer: l[2],
|
||||
};
|
||||
|
||||
for (i = 0; i < layer.length; i++) {
|
||||
let feature = layer.feature(i);
|
||||
context.feature = feature;
|
||||
sink.writeMessage(2, writeFeature, context);
|
||||
}
|
||||
|
||||
// finalize the layer by writing key/values
|
||||
|
||||
var keys = context.keys;
|
||||
for (i = 0; i < keys.length; i++) {
|
||||
sink.writeStringField(3, keys[i]);
|
||||
}
|
||||
|
||||
var values = context.values;
|
||||
for (i = 0; i < values.length; i++) {
|
||||
sink.writeMessage(4, writeValue, values[i]);
|
||||
}
|
||||
}
|
||||
|
||||
interface LayerWriteContext {
|
||||
keys: string[];
|
||||
values: (string | boolean | number)[];
|
||||
keycache: { [_: string]: number };
|
||||
valuecache: { [_: string]: number };
|
||||
feature?: VectorTileFeature;
|
||||
names: Set<string>;
|
||||
forLayer: Set<string>;
|
||||
}
|
||||
|
||||
// the resulting blob is a vector tile
|
||||
// includes only the layers specified by key;
|
||||
// includes only the named attributes
|
||||
export const vtfilter = (data: Uint8Array, attrstring?:string): Uint8Array => {
|
||||
if (!attrstring || attrstring === "" || attrstring === "*") {
|
||||
return data;
|
||||
}
|
||||
const attrs = parseAttributes(attrstring);
|
||||
|
||||
const source = new VectorTile(new Protobuf(data));
|
||||
const sink = new Protobuf();
|
||||
|
||||
// WARNING: might change the layer order
|
||||
for (const layername in source.layers) {
|
||||
let layer = source.layers[layername];
|
||||
sink.writeMessage(3, writeLayer, [
|
||||
layer,
|
||||
attrs.names,
|
||||
attrs.byLayer.get(layername) || new Set(),
|
||||
]);
|
||||
}
|
||||
return sink.finish();
|
||||
};
|
||||
Reference in New Issue
Block a user