From 614964d314b4f566a12e6e5fae31330c88663586 Mon Sep 17 00:00:00 2001
From: Alexander Metzger <alexander.le@outlook.dk>
Date: Sun, 11 Feb 2024 17:58:05 -0800
Subject: [PATCH] email invites and notifications

---
 package-lock.json                | 402 ++++---------------------------
 package.json                     |   3 +-
 public/admin.html                |  34 ++-
 public/admin.js                  |  93 ++++++-
 public/components/ContactForm.js |   5 -
 public/styles/inputs.css         |   6 +
 public/util/Auth.js              |  15 ++
 public/util/Client.js            |  11 +
 server/Google.js                 |  53 ++++
 server/server.js                 |   4 +
 10 files changed, 253 insertions(+), 373 deletions(-)
 create mode 100644 server/Google.js

diff --git a/package-lock.json b/package-lock.json
index fb0601f..8681667 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -15,7 +15,8 @@
                 "express": "^4.18.2",
                 "express-admin": "^2.0.0",
                 "firebase-admin": "^11.3.0",
-                "firebase-tools": "^12.9.1",
+                "firebase-tools": "^13.2.1",
+                "node-fetch": "^2.7.0",
                 "node-persist": "^3.1.3",
                 "sqlite3": "^5.1.2",
                 "uuid": "^9.0.0"
@@ -726,9 +727,9 @@
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         "node_modules/@npmcli/agent": {
-            "version": "2.2.0",
-            "resolved": "https://registry.npmjs.org/@npmcli/agent/-/agent-2.2.0.tgz",
-            "integrity": "sha512-2yThA1Es98orMkpSLVqlDZAMPK3jHJhifP2gnNUdk1754uZ8yI5c+ulCoVG+WlntQA6MzhrURMXjSd9Z7dJ2/Q==",
+            "version": "2.2.1",
+            "resolved": "https://registry.npmjs.org/@npmcli/agent/-/agent-2.2.1.tgz",
+            "integrity": "sha512-H4FrOVtNyWC8MUwL3UfjOsAihHvT1Pe8POj3JvjXhSTJipsZMtgUALCT4mGyYZNxymkUfOw3PUj6dE4QPp6osQ==",
             "optional": true,
             "dependencies": {
                 "agent-base": "^7.1.0",
@@ -784,13 +785,10 @@
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         },
         "node_modules/@npmcli/agent/node_modules/lru-cache": {
-            "version": "10.0.2",
-            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.0.2.tgz",
-            "integrity": "sha512-Yj9mA8fPiVgOUpByoTZO5pNrcl5Yk37FcSHsUINpAsaBIEZIuqcCclDZJCVxqQShDsmYX8QG63svJiTbOATZwg==",
+            "version": "10.2.0",
+            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.2.0.tgz",
+            "integrity": "sha512-2bIM8x+VAf6JT4bKAljS1qUWgMsqZRPGJS6FSahIMPVvctcNhyVp7AJu7quxOW9jwkryBReKZY5tY5JYv2n/7Q==",
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-            "dependencies": {
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-            },
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@@ -1606,22 +1604,6 @@
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             "dev": true
         },
-        "node_modules/asn1": {
-            "version": "0.2.6",
-            "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.6.tgz",
-            "integrity": "sha512-ix/FxPn0MDjeyJ7i/yoHGFt/EX6LyNbxSEhPPXODPL+KB0VPk86UYfL0lMdy+KCnv+fmvIzySwaK5COwqVbWTQ==",
-            "dependencies": {
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-            }
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-        "node_modules/assert-plus": {
-            "version": "1.0.0",
-            "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-            "integrity": "sha512-NfJ4UzBCcQGLDlQq7nHxH+tv3kyZ0hHQqF5BO6J7tNJeP5do1llPr8dZ8zHonfhAu0PHAdMkSo+8o0wxg9lZWw==",
-            "engines": {
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         "node_modules/assign-symbols": {
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@@ -1708,19 +1690,6 @@
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-        "node_modules/aws-sign2": {
-            "version": "0.7.0",
-            "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
-            "integrity": "sha512-08kcGqnYf/YmjoRhfxyu+CLxBjUtHLXLXX/vUfx9l2LYzG3c1m61nrpyFUZI6zeS+Li/wWMMidD9KgrqtGq3mA==",
-            "engines": {
-                "node": "*"
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-        "node_modules/aws4": {
-            "version": "1.12.0",
-            "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.12.0.tgz",
-            "integrity": "sha512-NmWvPnx0F1SfrQbYwOi7OeaNGokp9XhzNioJ/CSBs8Qa4vxug81mhJEAVZwxXuBmYB5KDRfMq/F3RR0BIU7sWg=="
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@@ -1797,21 +1766,13 @@
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-            "version": "5.0.3",
-            "resolved": "https://registry.npmjs.org/basic-ftp/-/basic-ftp-5.0.3.tgz",
-            "integrity": "sha512-QHX8HLlncOLpy54mh+k/sWIFd0ThmRqwe9ZjELybGZK+tZ8rUb9VO0saKJUROTbE+KhzDUT7xziGpGrW8Kmd+g==",
+            "version": "5.0.4",
+            "resolved": "https://registry.npmjs.org/basic-ftp/-/basic-ftp-5.0.4.tgz",
+            "integrity": "sha512-8PzkB0arJFV4jJWSGOYR+OEic6aeKMu/osRhBULN6RY0ykby6LKhbmuQ5ublvaas5BOwboah5D87nrHyuh8PPA==",
             "engines": {
                 "node": ">=10.0.0"
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         },
-        "node_modules/bcrypt-pbkdf": {
-            "version": "1.0.2",
-            "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
-            "integrity": "sha512-qeFIXtP4MSoi6NLqO12WfqARWWuCKi2Rn/9hJLEmtB5yTNr9DqFWkJRCf2qShWzPeAMRnOgCrq0sg/KLv5ES9w==",
-            "dependencies": {
-                "tweetnacl": "^0.14.3"
-            }
-        },
         "node_modules/big-integer": {
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@@ -2138,11 +2099,6 @@
                 "cdl": "bin/cdl.js"
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-        "node_modules/caseless": {
-            "version": "0.12.0",
-            "resolved": "https://registry.npmjs.org/caseless/-/caseless-0.12.0.tgz",
-            "integrity": "sha512-4tYFyifaFfGacoiObjJegolkwSU4xQNGbVgUiNYVUxbQ2x2lUsFvY4hVgVzGiIe6WLOPqycWXA40l+PWsxthUw=="
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             "resolved": "https://registry.npmjs.org/catharsis/-/catharsis-0.9.0.tgz",
@@ -2334,9 +2290,9 @@
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-            "version": "2.9.1",
-            "resolved": "https://registry.npmjs.org/cli-spinners/-/cli-spinners-2.9.1.tgz",
-            "integrity": "sha512-jHgecW0pxkonBJdrKsqxgRX9AcG+u/5k0Q7WPDfi8AogLAdwxEkyYYNWwZ5GvVFoFx2uiY1eNcSK00fh+1+FyQ==",
+            "version": "2.9.2",
+            "resolved": "https://registry.npmjs.org/cli-spinners/-/cli-spinners-2.9.2.tgz",
+            "integrity": "sha512-ywqV+5MmyL4E7ybXgKys4DugZbX0FC6LnwrhjuykIjnK9k8OQacQ7axGKnjDXWNhns0xot3bZI5h55H8yo9cJg==",
             "engines": {
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@@ -3339,9 +3295,9 @@
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-            "version": "5.5.2",
-            "resolved": "https://registry.npmjs.org/csv-parse/-/csv-parse-5.5.2.tgz",
-            "integrity": "sha512-YRVtvdtUNXZCMyK5zd5Wty1W6dNTpGKdqQd4EQ8tl/c6KW1aMBB1Kg1ppky5FONKmEqGJ/8WjLlTNLPne4ioVA=="
+            "version": "5.5.3",
+            "resolved": "https://registry.npmjs.org/csv-parse/-/csv-parse-5.5.3.tgz",
+            "integrity": "sha512-v0KW6C0qlZzoGjk6u5tLmVfyZxNgPGXZsWTXshpAgKVGmGXzaVWGdlCFxNx5iuzcXT/oJN1HHM9DZKwtAtYa+A=="
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@@ -3349,17 +3305,6 @@
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-        "node_modules/dashdash": {
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@@ -3690,15 +3635,6 @@
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-            "version": "0.1.2",
-            "resolved": "https://registry.npmjs.org/ecc-jsbn/-/ecc-jsbn-0.1.2.tgz",
-            "integrity": "sha512-eh9O+hwRHNbG4BLTjEl3nw044CkGm5X6LoaCf7LPp7UU8Qrt47JYNi6nPX8xjW97TKGKm1ouctg0QSpZe9qrnw==",
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@@ -4526,14 +4462,6 @@
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-        "node_modules/extsprintf": {
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-            "resolved": "https://registry.npmjs.org/extsprintf/-/extsprintf-1.3.0.tgz",
-            "integrity": "sha512-11Ndz7Nv+mvAC1j0ktTa7fAb0vLyGGX+rMHNBYQviQDGU0Hw7lhctJANqbPhu9nV9/izT/IntTgZ7Im/9LJs9g==",
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@@ -4768,9 +4696,9 @@
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         "node_modules/firebase-tools": {
-            "version": "12.9.1",
-            "resolved": "https://registry.npmjs.org/firebase-tools/-/firebase-tools-12.9.1.tgz",
-            "integrity": "sha512-t/oTgGnGm3sLT3wR80B7hY6vdAs6rTlZMsmnZGsP+GeKtVzaB5KHEwLbkZuRXtqij9f35IfkQm2a4TKjKY6xUQ==",
+            "version": "13.2.1",
+            "resolved": "https://registry.npmjs.org/firebase-tools/-/firebase-tools-13.2.1.tgz",
+            "integrity": "sha512-Dx0h9P4m0T1wWz6Yjk+VOZA/Fef1iM09gpbAxBl+2GAO3KcN3kQf8fvhlzkisCqAnVxB8U2rYRI6ZR1JwY+cqQ==",
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@@ -4814,7 +4742,6 @@
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@@ -4837,7 +4764,7 @@
                 "firebase": "lib/bin/firebase.js"
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-                "node": ">=16.13.0 || >=18.0.0"
+                "node": ">=18.0.0 || >=20.0.0"
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         "node_modules/firebase-tools/node_modules/gaxios": {
@@ -4994,14 +4921,6 @@
                 "url": "https://github.com/sponsors/isaacs"
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@@ -5259,14 +5178,6 @@
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@@ -5493,27 +5404,6 @@
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@@ -7928,14 +7770,6 @@
                 "url": "https://github.com/fb55/nth-check?sponsor=1"
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-        "node_modules/oauth-sign": {
-            "version": "0.9.0",
-            "resolved": "https://registry.npmjs.org/oauth-sign/-/oauth-sign-0.9.0.tgz",
-            "integrity": "sha512-fexhUFFPTGV8ybAtSIGbV6gOkSv8UtRbDBnAyLQw4QPKkgNlsH2ByPGtMUqdWkos6YCRmAqViwgZrJc/mRDzZQ==",
-            "engines": {
-                "node": "*"
-            }
-        },
         "node_modules/object-assign": {
             "version": "4.1.1",
             "resolved": "https://registry.npmjs.org/object-assign/-/object-assign-4.1.1.tgz",
@@ -8390,13 +8224,10 @@
             }
         },
         "node_modules/path-scurry/node_modules/lru-cache": {
-            "version": "10.0.2",
-            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.0.2.tgz",
-            "integrity": "sha512-Yj9mA8fPiVgOUpByoTZO5pNrcl5Yk37FcSHsUINpAsaBIEZIuqcCclDZJCVxqQShDsmYX8QG63svJiTbOATZwg==",
+            "version": "10.2.0",
+            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.2.0.tgz",
+            "integrity": "sha512-2bIM8x+VAf6JT4bKAljS1qUWgMsqZRPGJS6FSahIMPVvctcNhyVp7AJu7quxOW9jwkryBReKZY5tY5JYv2n/7Q==",
             "optional": true,
-            "dependencies": {
-                "semver": "^7.3.5"
-            },
             "engines": {
                 "node": "14 || >=16.14"
             }
@@ -8424,11 +8255,6 @@
                 "node": ">=8"
             }
         },
-        "node_modules/performance-now": {
-            "version": "2.1.0",
-            "resolved": "https://registry.npmjs.org/performance-now/-/performance-now-2.1.0.tgz",
-            "integrity": "sha512-7EAHlyLHI56VEIdK57uwHdHKIaAGbnXPiw0yWbarQZOKaKpvUIgW0jWRVLiatnM+XXlSwsanIBH/hzGMJulMow=="
-        },
         "node_modules/picocolors": {
             "version": "1.0.0",
             "resolved": "https://registry.npmjs.org/picocolors/-/picocolors-1.0.0.tgz",
@@ -8771,11 +8597,6 @@
             "resolved": "https://registry.npmjs.org/pseudomap/-/pseudomap-1.0.2.tgz",
             "integrity": "sha512-b/YwNhb8lk1Zz2+bXXpS/LK9OisiZZ1SNsSLxN1x2OXVEhW2Ckr/7mWE5vrC1ZTiJlD9g19jWszTmJsB+oEpFQ=="
         },
-        "node_modules/psl": {
-            "version": "1.9.0",
-            "resolved": "https://registry.npmjs.org/psl/-/psl-1.9.0.tgz",
-            "integrity": "sha512-E/ZsdU4HLs/68gYzgGTkMicWTLPdAftJLfJFlLUAAKZGkStNU72sZjT66SnMDVOfOWY/YAoiD7Jxa9iHvngcag=="
-        },
         "node_modules/pstree.remy": {
             "version": "1.1.8",
             "resolved": "https://registry.npmjs.org/pstree.remy/-/pstree.remy-1.1.8.tgz",
@@ -8899,9 +8720,9 @@
             }
         },
         "node_modules/re2": {
-            "version": "1.20.8",
-            "resolved": "https://registry.npmjs.org/re2/-/re2-1.20.8.tgz",
-            "integrity": "sha512-5GArE3towC0ZyinRkkaZARZxlbX3K+z2REXSVltGSW+F/ID8SLrbh1okTXEcTFBp9zsAhKcGH1Vm+zJ2IwMb7Q==",
+            "version": "1.20.9",
+            "resolved": "https://registry.npmjs.org/re2/-/re2-1.20.9.tgz",
+            "integrity": "sha512-ZYcPTFr5ha2xq3WQjBDTF9CWPSDK1z28MLh5UFRxc//7X8BNQ3A7yR7ITnP0jO346661ertdKVFqw1qoL3FMEQ==",
             "hasInstallScript": true,
             "optional": true,
             "dependencies": {
@@ -8941,9 +8762,9 @@
             }
         },
         "node_modules/re2/node_modules/cacache": {
-            "version": "18.0.0",
-            "resolved": "https://registry.npmjs.org/cacache/-/cacache-18.0.0.tgz",
-            "integrity": "sha512-I7mVOPl3PUCeRub1U8YoGz2Lqv9WOBpobZ8RyWFXmReuILz+3OAyTa5oH3QPdtKZD7N0Yk00aLfzn0qvp8dZ1w==",
+            "version": "18.0.2",
+            "resolved": "https://registry.npmjs.org/cacache/-/cacache-18.0.2.tgz",
+            "integrity": "sha512-r3NU8h/P+4lVUHfeRw1dtgQYar3DZMm4/cm2bZgOvrFC/su7budSOeqh52VJIC4U4iG1WWwV6vRW0znqBvxNuw==",
             "optional": true,
             "dependencies": {
                 "@npmcli/fs": "^3.1.0",
@@ -8951,7 +8772,7 @@
                 "glob": "^10.2.2",
                 "lru-cache": "^10.0.1",
                 "minipass": "^7.0.3",
-                "minipass-collect": "^1.0.2",
+                "minipass-collect": "^2.0.1",
                 "minipass-flush": "^1.0.5",
                 "minipass-pipeline": "^1.2.4",
                 "p-map": "^4.0.0",
@@ -9007,13 +8828,10 @@
             }
         },
         "node_modules/re2/node_modules/lru-cache": {
-            "version": "10.0.2",
-            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.0.2.tgz",
-            "integrity": "sha512-Yj9mA8fPiVgOUpByoTZO5pNrcl5Yk37FcSHsUINpAsaBIEZIuqcCclDZJCVxqQShDsmYX8QG63svJiTbOATZwg==",
+            "version": "10.2.0",
+            "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-10.2.0.tgz",
+            "integrity": "sha512-2bIM8x+VAf6JT4bKAljS1qUWgMsqZRPGJS6FSahIMPVvctcNhyVp7AJu7quxOW9jwkryBReKZY5tY5JYv2n/7Q==",
             "optional": true,
-            "dependencies": {
-                "semver": "^7.3.5"
-            },
             "engines": {
                 "node": "14 || >=16.14"
             }
@@ -9064,6 +8882,18 @@
                 "node": ">=16 || 14 >=14.17"
             }
         },
+        "node_modules/re2/node_modules/minipass-collect": {
+            "version": "2.0.1",
+            "resolved": "https://registry.npmjs.org/minipass-collect/-/minipass-collect-2.0.1.tgz",
+            "integrity": "sha512-D7V8PO9oaz7PWGLbCACuI1qEOsq7UKfLotx/C0Aet43fCUB/wfQ7DYeq2oR/svFJGYDHPr38SHATeaj/ZoKHKw==",
+            "optional": true,
+            "dependencies": {
+                "minipass": "^7.0.3"
+            },
+            "engines": {
+                "node": ">=16 || 14 >=14.17"
+            }
+        },
         "node_modules/re2/node_modules/minipass-fetch": {
             "version": "3.0.4",
             "resolved": "https://registry.npmjs.org/minipass-fetch/-/minipass-fetch-3.0.4.tgz",
@@ -9283,87 +9113,6 @@
                 "node": ">=0.10"
             }
         },
-        "node_modules/request": {
-            "version": "2.88.2",
-            "resolved": "https://registry.npmjs.org/request/-/request-2.88.2.tgz",
-            "integrity": "sha512-MsvtOrfG9ZcrOwAW+Qi+F6HbD0CWXEh9ou77uOb7FM2WPhwT7smM833PzanhJLsgXjN89Ir6V2PczXNnMpwKhw==",
-            "deprecated": "request has been deprecated, see https://github.com/request/request/issues/3142",
-            "dependencies": {
-                "aws-sign2": "~0.7.0",
-                "aws4": "^1.8.0",
-                "caseless": "~0.12.0",
-                "combined-stream": "~1.0.6",
-                "extend": "~3.0.2",
-                "forever-agent": "~0.6.1",
-                "form-data": "~2.3.2",
-                "har-validator": "~5.1.3",
-                "http-signature": "~1.2.0",
-                "is-typedarray": "~1.0.0",
-                "isstream": "~0.1.2",
-                "json-stringify-safe": "~5.0.1",
-                "mime-types": "~2.1.19",
-                "oauth-sign": "~0.9.0",
-                "performance-now": "^2.1.0",
-                "qs": "~6.5.2",
-                "safe-buffer": "^5.1.2",
-                "tough-cookie": "~2.5.0",
-                "tunnel-agent": "^0.6.0",
-                "uuid": "^3.3.2"
-            },
-            "engines": {
-                "node": ">= 6"
-            }
-        },
-        "node_modules/request/node_modules/form-data": {
-            "version": "2.3.3",
-            "resolved": "https://registry.npmjs.org/form-data/-/form-data-2.3.3.tgz",
-            "integrity": "sha512-1lLKB2Mu3aGP1Q/2eCOx0fNbRMe7XdwktwOruhfqqd0rIJWwN4Dh+E3hrPSlDCXnSR7UtZ1N38rVXm+6+MEhJQ==",
-            "dependencies": {
-                "asynckit": "^0.4.0",
-                "combined-stream": "^1.0.6",
-                "mime-types": "^2.1.12"
-            },
-            "engines": {
-                "node": ">= 0.12"
-            }
-        },
-        "node_modules/request/node_modules/punycode": {
-            "version": "2.3.1",
-            "resolved": "https://registry.npmjs.org/punycode/-/punycode-2.3.1.tgz",
-            "integrity": "sha512-vYt7UD1U9Wg6138shLtLOvdAu+8DsC/ilFtEVHcH+wydcSpNE20AfSOduf6MkRFahL5FY7X1oU7nKVZFtfq8Fg==",
-            "engines": {
-                "node": ">=6"
-            }
-        },
-        "node_modules/request/node_modules/qs": {
-            "version": "6.5.3",
-            "resolved": "https://registry.npmjs.org/qs/-/qs-6.5.3.tgz",
-            "integrity": "sha512-qxXIEh4pCGfHICj1mAJQ2/2XVZkjCDTcEgfoSQxc/fYivUZxTkk7L3bDBJSoNrEzXI17oUO5Dp07ktqE5KzczA==",
-            "engines": {
-                "node": ">=0.6"
-            }
-        },
-        "node_modules/request/node_modules/tough-cookie": {
-            "version": "2.5.0",
-            "resolved": "https://registry.npmjs.org/tough-cookie/-/tough-cookie-2.5.0.tgz",
-            "integrity": "sha512-nlLsUzgm1kfLXSXfRZMc1KLAugd4hqJHDTvc2hDIwS3mZAfMEuMbc03SujMF+GEcpaX/qboeycw6iO8JwVv2+g==",
-            "dependencies": {
-                "psl": "^1.1.28",
-                "punycode": "^2.1.1"
-            },
-            "engines": {
-                "node": ">=0.8"
-            }
-        },
-        "node_modules/request/node_modules/uuid": {
-            "version": "3.4.0",
-            "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
-            "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
-            "deprecated": "Please upgrade  to version 7 or higher.  Older versions may use Math.random() in certain circumstances, which is known to be problematic.  See https://v8.dev/blog/math-random for details.",
-            "bin": {
-                "uuid": "bin/uuid"
-            }
-        },
         "node_modules/require-directory": {
             "version": "2.1.1",
             "resolved": "https://registry.npmjs.org/require-directory/-/require-directory-2.1.1.tgz",
@@ -10151,30 +9900,6 @@
             "resolved": "https://registry.npmjs.org/sr-pagination/-/sr-pagination-1.0.1.tgz",
             "integrity": "sha512-jbleD6cR9HNwNbmgTsOcGO6seeYfOGrI8ok7ooMQIxqsqU36ByOyl3faGkOMpsAqKVXrk9qLf1vdKdjyzJ4SbA=="
         },
-        "node_modules/sshpk": {
-            "version": "1.18.0",
-            "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.18.0.tgz",
-            "integrity": "sha512-2p2KJZTSqQ/I3+HX42EpYOa2l3f8Erv8MWKsy2I9uf4wA7yFIkXRffYdsx86y6z4vHtV8u7g+pPlr8/4ouAxsQ==",
-            "dependencies": {
-                "asn1": "~0.2.3",
-                "assert-plus": "^1.0.0",
-                "bcrypt-pbkdf": "^1.0.0",
-                "dashdash": "^1.12.0",
-                "ecc-jsbn": "~0.1.1",
-                "getpass": "^0.1.1",
-                "jsbn": "~0.1.0",
-                "safer-buffer": "^2.0.2",
-                "tweetnacl": "~0.14.0"
-            },
-            "bin": {
-                "sshpk-conv": "bin/sshpk-conv",
-                "sshpk-sign": "bin/sshpk-sign",
-                "sshpk-verify": "bin/sshpk-verify"
-            },
-            "engines": {
-                "node": ">=0.10.0"
-            }
-        },
         "node_modules/ssri": {
             "version": "8.0.1",
             "resolved": "https://registry.npmjs.org/ssri/-/ssri-8.0.1.tgz",
@@ -11534,22 +11259,6 @@
                 "node": "^12.13.0 || ^14.15.0 || >=16.0.0"
             }
         },
-        "node_modules/tunnel-agent": {
-            "version": "0.6.0",
-            "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
-            "integrity": "sha512-McnNiV1l8RYeY8tBgEpuodCC1mLUdbSN+CYBL7kJsJNInOP8UjDDEwdk6Mw60vdLLrr5NHKZhMAOSrR2NZuQ+w==",
-            "dependencies": {
-                "safe-buffer": "^5.0.1"
-            },
-            "engines": {
-                "node": "*"
-            }
-        },
-        "node_modules/tweetnacl": {
-            "version": "0.14.5",
-            "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-            "integrity": "sha512-KXXFFdAbFXY4geFIwoyNK+f5Z1b7swfXABfL7HXCmoIWMKU3dmS26672A4EeQtDzLKy7SXmfBu51JolvEKwtGA=="
-        },
         "node_modules/type-check": {
             "version": "0.3.2",
             "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.3.2.tgz",
@@ -11894,19 +11603,6 @@
                 "node": ">= 0.8"
             }
         },
-        "node_modules/verror": {
-            "version": "1.10.0",
-            "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
-            "integrity": "sha512-ZZKSmDAEFOijERBLkmYfJ+vmk3w+7hOLYDNkRCuRuMJGEmqYNCNLyBBFwWKVMhfwaEF3WOd0Zlw86U/WC/+nYw==",
-            "engines": [
-                "node >=0.6.0"
-            ],
-            "dependencies": {
-                "assert-plus": "^1.0.0",
-                "core-util-is": "1.0.2",
-                "extsprintf": "^1.2.0"
-            }
-        },
         "node_modules/wcwidth": {
             "version": "1.0.1",
             "resolved": "https://registry.npmjs.org/wcwidth/-/wcwidth-1.0.1.tgz",
@@ -11942,9 +11638,9 @@
             }
         },
         "node_modules/whatwg-fetch": {
-            "version": "3.6.19",
-            "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.19.tgz",
-            "integrity": "sha512-d67JP4dHSbm2TrpFj8AbO8DnL1JXL5J9u0Kq2xW6d0TFDbCA3Muhdt8orXC22utleTVj7Prqt82baN6RBvnEgw=="
+            "version": "3.6.20",
+            "resolved": "https://registry.npmjs.org/whatwg-fetch/-/whatwg-fetch-3.6.20.tgz",
+            "integrity": "sha512-EqhiFU6daOA8kpjOWTL0olhVOF3i7OrFzSYiGsEMB8GcXS+RrzauAERX65xMeNWVqxA6HXH2m69Z9LaKKdisfg=="
         },
         "node_modules/whatwg-url": {
             "version": "5.0.0",
diff --git a/package.json b/package.json
index 0fe237c..5f1ad74 100644
--- a/package.json
+++ b/package.json
@@ -24,7 +24,8 @@
         "express": "^4.18.2",
         "express-admin": "^2.0.0",
         "firebase-admin": "^11.3.0",
-        "firebase-tools": "^12.9.1",
+        "firebase-tools": "^13.2.1",
+        "node-fetch": "^2.7.0",
         "node-persist": "^3.1.3",
         "sqlite3": "^5.1.2",
         "uuid": "^9.0.0"
diff --git a/public/admin.html b/public/admin.html
index b234cc5..e1fc680 100644
--- a/public/admin.html
+++ b/public/admin.html
@@ -18,6 +18,7 @@
         <script type="module" src="/components/Navigation.js"></script>
         <script type="module" src="/components/TypeSelect.js"></script>
         <script type="module" src="/components/Table.js"></script>
+        <script type="module" src="/components/Popup.js"></script>
 
         <style>
             /* smooth load */
@@ -32,7 +33,9 @@
                 <h1>Dashboard</h1>
                 <type-select id="businessId" name="businesses" label="Group:"></type-select>
                 <div id="qrcode" class="img"></div>
-                <button id="joinlink" class="button">Copy Join Link</button><br />
+                <button id="joinlink" class="button">Copy Join Link</button>
+                <button id="emailInvite" class="button">Invite by Email</button>
+                <br />
             </section>
             <section class="light-section">
                 <h1>Events</h1>
@@ -185,15 +188,26 @@ <h1>Event Table</h1>
                 <attendance-table id="table"></attendance-table>
             </section>
             <section class="dark-section">
-                <h1>Business Settings</h1>
-                <div style="display: flex; justify-content: center; margin-bottom: 12px">
-                    <label style="font-size: 1.5rem; padding: 0.2rem"
-                        >Require joining business before attendance can be taken</label
-                    >
-                    <div class="checkbox-wrapper-6">
-                        <input id="require-join" class="tgl tgl-light" type="checkbox" />
-                        <label class="tgl-btn" style="font-size: 16px" for="require-join"></label>
-                    </div>
+                <h1>Group Settings</h1>
+                <div class="form" style="padding-right: 1em;">
+                    <label for="require-join" style="display: flex; justify-content: space-evenly;">
+                        Only take attendance for members
+                        <div class="checkbox-wrapper-6">
+                            <input id="require-join" class="tgl tgl-light" type="checkbox" />
+                            <label class="tgl-btn" style="font-size: 16px" for="require-join"></label>
+                        </div>
+                    </label>
+                    <hr>
+                    <label for="email-notification"
+                        >Send email notification to group members</label
+                    ><br>
+                    <textarea
+                        id="email-notification"
+                        style="resize: vertical"
+                        rows="7"
+                        name="email-notification"
+                    ></textarea><br>
+                    <button id="sent-email" class="button">Send Email to Everyone</button>
                 </div>
             </section>
         </navigation-manager>
diff --git a/public/admin.js b/public/admin.js
index 98e31ab..f945996 100644
--- a/public/admin.js
+++ b/public/admin.js
@@ -1,10 +1,11 @@
-import { GET } from './util/Client.js';
-import { requireLogin } from './util/Auth.js';
+import { GET, sendEmail } from './util/Client.js';
+import { requireLogin, requestGoogleCredential, getCurrentUser } from './util/Auth.js';
 import { Popup } from './components/Popup.js';
 import { initBusinessSelector, initEventSelector } from './util/selectors.js';
 import { sanitizeText } from './util/util.js';
 const QRCode = window.QRCode;
 await requireLogin();
+const user = await getCurrentUser();
 
 const attendanceTable = document.getElementById('table');
 attendanceTable.addEventListener('reloadTable', () => {
@@ -49,18 +50,103 @@ async function updateJoinLink() {
             document.getElementById('joinlink').classList.remove('success');
         }, 5000);
     };
+
+    document.getElementById('emailInvite').onclick = async () => {
+        const emails = await Popup.prompt(
+            'Enter comma separated email addresses of the people you want to invite:',
+            'var(--primary)',
+        );
+        if (!emails) {
+            Popup.alert('No emails entered.', 'var(--error)');
+            return;
+        }
+        const credential = await requestGoogleCredential([
+            'https://www.googleapis.com/auth/gmail.send',
+        ]);
+        let success = true;
+        for (const email of emails.split(',')) {
+            const res = await sendEmail(
+                email.trim(),
+                'Attendance Scanner Invitation',
+                `
+Hi!
+
+You have been invited to join my group on Attendance Scanner QR.
+
+Please click this link to join: ${joinlink}.
+
+Best,
+${sanitizeText(credential.name)}
+(automatically sent via Attendance Scanner QR)
+                `.trim(),
+                credential,
+            );
+            if (!res.ok) {
+                success = false;
+                const obj = await res.json();
+                const message = obj.error.message;
+                Popup.alert(
+                    `Email to ${sanitizeText(email)} failed to send. ` + message,
+                    'var(--error)',
+                );
+            }
+        }
+        if (success) {
+            Popup.alert('Emails sent successfully!', 'var(--success)');
+        }
+    };
 }
 updateJoinLink();
 
+const members = new Set();
 async function runTable() {
     let attendancearr = await (await GET(`/attendancedata?businessId=${getBusinessId()}`)).json();
+    for (const user of attendancearr) {
+        members.add({ name: user.name, email: user.email });
+    }
     attendanceTable.updateTable(attendancearr, events, getBusinessId());
 }
 
+const email_notification = document.getElementById('email-notification');
+email_notification.textContent = `
+Hi [MEMBER_NAME],
+
+We'll be having an extra rehearsal on Monday at XXXX. We hope to see you there!
+
+Best,
+${user.name}
+(automatically sent via Attendance Scanner QR)
+`.trim();
+document.getElementById('sent-email').onclick = async () => {
+    const credential = await requestGoogleCredential([
+        'https://www.googleapis.com/auth/gmail.send',
+    ]);
+    let success = true;
+    for (const member of members) {
+        const res = await sendEmail(
+            member.email,
+            'Attendance Scanner Notification',
+            email_notification.textContent.replace('[MEMBER_NAME]', member.name),
+            credential,
+        );
+        if (!res.ok) {
+            success = false;
+            const obj = await res.json();
+            const message = obj.error.message;
+            Popup.alert(
+                `Email to ${sanitizeText(member[1])} failed to send. ` + message,
+                'var(--error)',
+            );
+        }
+    }
+    if (success) {
+        Popup.alert('Emails sent successfully!', 'var(--success)');
+    }
+};
+
 async function setRecordSettings() {
     const res = await (await GET(`/getRecordSettings?businessId=${getBusinessId()}`)).json();
     const requireJoin = res.requireJoin;
-    console.log(requireJoin);
     if (requireJoin) {
         document.getElementById('require-join').checked = true;
     }
@@ -69,7 +155,6 @@ async function setRecordSettings() {
 
 document.getElementById('require-join').addEventListener('change', async e => {
     const requireJoin = e.target.checked ? 1 : 0;
-    console.log(requireJoin);
     await GET(`/changeRecordSettings?businessId=${getBusinessId()}&newStatus=${requireJoin}`);
 });
 
diff --git a/public/components/ContactForm.js b/public/components/ContactForm.js
index af369de..fab47f9 100644
--- a/public/components/ContactForm.js
+++ b/public/components/ContactForm.js
@@ -32,11 +32,6 @@ class ContactForm extends Component {
                 font-size: 3rem;
                 padding: 0.2em;
             }
-            hr {
-                width: 3rem;
-                border: 2px solid var(--accent);
-                margin: 0 auto;
-            }
             div {
                 width: 100%;
                 max-width: var(--max-width-small);
diff --git a/public/styles/inputs.css b/public/styles/inputs.css
index 2b84df0..86c1e76 100644
--- a/public/styles/inputs.css
+++ b/public/styles/inputs.css
@@ -1,3 +1,9 @@
+hr {
+    width: 3rem;
+    border: 2px solid var(--accent);
+    margin: 0 auto;
+}
+
 .form label {
     font-size: 1.5rem;
     padding: 0.2rem;
diff --git a/public/util/Auth.js b/public/util/Auth.js
index a4c8aab..8b2934e 100644
--- a/public/util/Auth.js
+++ b/public/util/Auth.js
@@ -143,3 +143,18 @@ export async function logout() {
         console.error(e);
     }
 }
+
+/**
+ * Prompts the user to log in to a google account and give permission for the specified scopes.
+ * @param {string[]} scopes Google API scopes to request permission for (if we already have them, the user will not be prompted for them)
+ * @returns the user's Google credential (with the user's name and email) if the user has logged in and given permission, otherwise null.
+ */
+export async function requestGoogleCredential(scopes) {
+    for (const scope of scopes) {
+        googleProvider.addScope(scope);
+    }
+    const signinResult = await signInWithPopup(auth, googleProvider);
+    const credential = GoogleAuthProvider.credentialFromResult(signinResult);
+
+    return { ...credential, name: signinResult.user.displayName, email: signinResult.user.email };
+}
diff --git a/public/util/Client.js b/public/util/Client.js
index 7ea7ebf..21a3dbc 100644
--- a/public/util/Client.js
+++ b/public/util/Client.js
@@ -23,3 +23,14 @@ export async function POST(url, data) {
         body: JSON.stringify(data),
     });
 }
+
+export async function sendEmail(to_email, subject, text, credential) {
+    const message = {
+        to_email: to_email,
+        from_email: credential.email,
+        subject: subject,
+        text: text,
+    };
+
+    return await POST('/sendEmail', { message: message, accessToken: credential.accessToken });
+}
diff --git a/server/Google.js b/server/Google.js
new file mode 100644
index 0000000..342c35d
--- /dev/null
+++ b/server/Google.js
@@ -0,0 +1,53 @@
+const express = require('express'),
+    router = express.Router();
+const fetch = require('node-fetch');
+const { handleAuth } = require('./Auth');
+
+// ===================== Gmail API =====================
+/**
+ * Sends an email using the Gmail API.
+ * @param {Object} message the email message to send
+ * @param {string} accessToken the access token to use to send the email
+ * @requiredPrivileges the user to be logged in
+ * @returns the response from the Gmail API
+ */
+router.post('/sendEmail', async (req, res) => {
+    await handleAuth(req, res);
+
+    const message = req.body.message;
+    const accessToken = req.body.accessToken;
+    const response = await callGmailAPI(message, accessToken);
+    res.status(response.status).send(await response.json());
+});
+
+function callGmailAPI(message, accessToken) {
+    const emailLines = [];
+    emailLines.push(`From: ${message.from_email}`);
+    emailLines.push(`To: ${message.to_email}`);
+    emailLines.push(`Subject: ${message.subject}`);
+    emailLines.push('');
+    emailLines.push(message.text);
+
+    const email = emailLines.join('\r\n');
+    const encodedEmail = encode(email);
+
+    return fetch('https://gmail.googleapis.com/gmail/v1/users/me/messages/send', {
+        method: 'POST',
+        headers: {
+            Authorization: 'Bearer ' + accessToken,
+            'Content-Type': 'application/json',
+            Accept: 'application/json',
+        },
+        body: JSON.stringify({
+            raw: encodedEmail,
+        }),
+    });
+}
+
+function encode(str, urlSafe = false) {
+    const encoded = Buffer.from(str).toString('base64');
+    return urlSafe ? encoded.replace(/\+/g, '-').replace(/\//g, '_') : encoded;
+}
+
+// ===================== Router =====================
+exports.googleRouter = router;
diff --git a/server/server.js b/server/server.js
index 2e28ba7..a7a428c 100644
--- a/server/server.js
+++ b/server/server.js
@@ -57,6 +57,10 @@ app.use('/', attendanceRouter);
 const { eventRouter } = require('./Event');
 app.use('/', eventRouter);
 
+// ============================ Google APIs ============================
+const { googleRouter } = require('./Google');
+app.use('/', googleRouter);
+
 // ============================ SERVER ============================
 // listen for requests :)
 module.exports.app = app;