From b547e203a613b468b908bddfea9997f3c0d3dcb8 Mon Sep 17 00:00:00 2001
From: Eric van der Vlist <vdv@dyomedea.com>
Date: Sun, 2 Apr 2023 12:35:53 +0200
Subject: [PATCH] Pluscode npm package plus a utility function to test if a
 string may be a pluscode

---
 package-lock.json              |  6 ++++++
 package.json                   |  1 +
 src/lib/check-pluscode.test.ts | 38 ++++++++++++++++++++++++++++++++++
 src/lib/check-pluscodes.ts     | 16 ++++++++++++++
 4 files changed, 61 insertions(+)
 create mode 100644 src/lib/check-pluscode.test.ts
 create mode 100644 src/lib/check-pluscodes.ts

diff --git a/package-lock.json b/package-lock.json
index 15c69f0..a1ff88a 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -35,6 +35,7 @@
         "ol": "^7.3.0",
         "osmtogeojson": "^3.0.0-beta.5",
         "patch-package": "^6.5.1",
+        "pluscodes": "^2.6.0",
         "pouchdb": "^8.0.1",
         "pouchdb-adapter-indexeddb": "^8.0.1",
         "pouchdb-browser": "^8.0.1",
@@ -7066,6 +7067,11 @@
         "node": ">=6"
       }
     },
+    "node_modules/pluscodes": {
+      "version": "2.6.0",
+      "resolved": "https://registry.npmjs.org/pluscodes/-/pluscodes-2.6.0.tgz",
+      "integrity": "sha512-+3sW+Qt+znuN2uMFFvebo2m5MsaTjBXOzEYvkfx4RMeOYnNCQv3OWeQujfRAo6nzg7D+5vD2b3tihtwW3b5pfg=="
+    },
     "node_modules/postcss": {
       "version": "8.4.21",
       "resolved": "https://registry.npmjs.org/postcss/-/postcss-8.4.21.tgz",
diff --git a/package.json b/package.json
index d3a65cd..4f460a3 100644
--- a/package.json
+++ b/package.json
@@ -58,6 +58,7 @@
     "ol": "^7.3.0",
     "osmtogeojson": "^3.0.0-beta.5",
     "patch-package": "^6.5.1",
+    "pluscodes": "^2.6.0",
     "pouchdb": "^8.0.1",
     "pouchdb-adapter-indexeddb": "^8.0.1",
     "pouchdb-browser": "^8.0.1",
diff --git a/src/lib/check-pluscode.test.ts b/src/lib/check-pluscode.test.ts
new file mode 100644
index 0000000..d4c0ca1
--- /dev/null
+++ b/src/lib/check-pluscode.test.ts
@@ -0,0 +1,38 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
+import maybePlusCode from './check-pluscodes';
+
+describe('The maybePlusCode method', () => {
+  it('detects a valid short pluscode without qualifier', () => {
+    const code = '9G8F+6W';
+    expect(maybePlusCode(code)).toEqual({ code, isShort: true });
+  });
+  it('detects a valid short pluscode with qualifier', () => {
+    const code = '948G+V4 Oviedo';
+    expect(maybePlusCode(code)).toEqual({
+      code: '948G+V4',
+      qualifier: 'Oviedo',
+      isShort: true,
+    });
+  });
+  it('detects a valid long pluscode with 10 digits', () => {
+    const code = '9FFW84J9+XG';
+    expect(maybePlusCode(code)).toEqual({
+      code,
+      isShort: false,
+    });
+  });
+  it('detects a valid long pluscode with 8 digits', () => {
+    const code = '9FFW84J9+';
+    expect(maybePlusCode(code)).toEqual({
+      code,
+      isShort: false,
+    });
+  });
+  it('detects a valid long pluscode with 4 digits', () => {
+    const code = '9FFW0000+';
+    expect(maybePlusCode(code)).toEqual({
+      code,
+      isShort: false,
+    });
+  });
+});
diff --git a/src/lib/check-pluscodes.ts b/src/lib/check-pluscodes.ts
new file mode 100644
index 0000000..539e359
--- /dev/null
+++ b/src/lib/check-pluscodes.ts
@@ -0,0 +1,16 @@
+const maybePlusRegexp =
+  /^([23456789CFGHJMPQRVWX]+0*\+[23456789CFGHJMPQRVWX]*)(\s+(.*))?$/;
+
+const maybePlusCode = (code: string) => {
+  const matches = code.match(maybePlusRegexp);
+  if (!matches) {
+    return false;
+  }
+  return {
+    code: matches[1],
+    isShort: matches[1].length < 9,
+    qualifier: matches[3] || undefined,
+  };
+};
+
+export default maybePlusCode;