Add NIP-21 and NIP-27 modules for parsing nostr URIs

nip27.test.js

@@ -0,0 +1,40 @@
+/* eslint-env jest */
+const {nip27} = require('./lib/nostr.cjs')
+
+test('find', () => {
+  const result = nip27.find(
+    'Hello nostr:npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6!\n\nnostr:note1gmtnz6q2m55epmlpe3semjdcq987av3jvx4emmjsa8g3s9x7tg4sclreky',
+  )
+
+  expect(result).toEqual([{
+    uri: 'nostr:npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6',
+    value: 'npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6',
+    decoded: { type: 'npub', data: '79c2cae114ea28a981e7559b4fe7854a473521a8d22a66bbab9fa248eb820ff6' },
+    start: 6,
+    end: 75,
+  }, {
+    uri: 'nostr:note1gmtnz6q2m55epmlpe3semjdcq987av3jvx4emmjsa8g3s9x7tg4sclreky',
+    value: 'note1gmtnz6q2m55epmlpe3semjdcq987av3jvx4emmjsa8g3s9x7tg4sclreky',
+    decoded: { type: 'note', data: '46d731680add2990efe1cc619dc9b8014feeb23261ab9dee50e9d11814de5a2b' },
+    start: 78,
+    end: 147,
+  }])
+})
+
+test('replaceAll', () => {
+  const content =
+    'Hello nostr:npub108pv4cg5ag52nq082kd5leu9ffrn2gdg6g4xdwatn73y36uzplmq9uyev6!\n\nnostr:note1gmtnz6q2m55epmlpe3semjdcq987av3jvx4emmjsa8g3s9x7tg4sclreky'
+
+  const result = nip27.replaceAll(content, ({ decoded, value }) => {
+    switch (decoded.type) {
+      case 'npub':
+        return '@alex'
+      case 'note':
+        return '!1234'
+      default:
+        return value
+    }
+  })
+
+  expect(result).toEqual('Hello @alex!\n\n!1234')
+})