From cce144fed3ce763d50c28425c50841de48464e21 Mon Sep 17 00:00:00 2001
From: Gabriel Arazas <foo.dogsquared@gmail.com>
Date: Sat, 17 Jul 2021 16:56:40 +0800
Subject: [PATCH] Add MathJax support and post metadata on site

---
 site/package-lock.json         | 547 +++++++++++++++++++++++++++++++++
 site/package.json              |   1 +
 site/src/components/Rehype.jsx |   3 -
 site/src/lib/api.js            |   1 -
 site/src/lib/orgToHtml.js      |   5 +-
 site/src/pages/[[...slug]].jsx |  45 ++-
 site/src/styles/globals.css    |  11 +
 7 files changed, 607 insertions(+), 6 deletions(-)

diff --git a/site/package-lock.json b/site/package-lock.json
index 8494cdc..ed49fcb 100644
--- a/site/package-lock.json
+++ b/site/package-lock.json
@@ -278,11 +278,29 @@
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     },
+    "@tootallnate/once": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
+      "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw=="
+    },
+    "@types/hast": {
+      "version": "2.3.2",
+      "resolved": "https://registry.npmjs.org/@types/hast/-/hast-2.3.2.tgz",
+      "integrity": "sha512-Op5W7jYgZI7AWKY5wQ0/QNMzQM7dGQPyW1rXKNiymVCy5iTfdPuGu4HhYNOM2sIv8gUfIuIdcYlXmAepwaowow==",
+      "requires": {
+        "@types/unist": "*"
+      }
+    },
     "@types/json-schema": {
       "version": "7.0.6",
       "resolved": "https://registry.npmjs.org/@types/json-schema/-/json-schema-7.0.6.tgz",
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     },
+    "@types/mathjax": {
+      "version": "0.0.36",
+      "resolved": "https://registry.npmjs.org/@types/mathjax/-/mathjax-0.0.36.tgz",
+      "integrity": "sha512-TqDJc2GWuTqd/m+G/FbNkN+/TF2OCCHvcawmhIrUaZkdVquMdNZmNiNUkupNg9qctorXXkVLVSogZv1DhmgLmg=="
+    },
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+    "abab": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/abab/-/abab-2.0.5.tgz",
+      "integrity": "sha512-9IK9EadsbHo6jLWIpxpR6pL0sazTXV6+SQv25ZB+F7Bj9mJNaOc4nCRabwd5M/JwmUa8idz6Eci6eKfJryPs6Q=="
+    },
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@@ -468,6 +491,27 @@
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     },
+    "acorn-globals": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/acorn-globals/-/acorn-globals-6.0.0.tgz",
+      "integrity": "sha512-ZQl7LOWaF5ePqqcX4hLuv/bLXYQNfNWw2c0/yX/TsPRKamzHcTGQnlCjHT3TsmkOUVEPS3crCxiPfdzE/Trlhg==",
+      "requires": {
+        "acorn": "^7.1.1",
+        "acorn-walk": "^7.1.1"
+      },
+      "dependencies": {
+        "acorn": {
+          "version": "7.4.1",
+          "resolved": "https://registry.npmjs.org/acorn/-/acorn-7.4.1.tgz",
+          "integrity": "sha512-nQyp0o1/mNdbTO1PO6kHkwSrmgZ0MT/jCCpNiwbUjGoRN4dlBhqJtoQuCnEOKzgTVwg0ZWiCoQy6SxMebQVh8A=="
+        }
+      }
+    },
+    "acorn-walk": {
+      "version": "7.2.0",
+      "resolved": "https://registry.npmjs.org/acorn-walk/-/acorn-walk-7.2.0.tgz",
+      "integrity": "sha512-OPdCF6GsMIP+Az+aWfAAOEt2/+iVDKE7oy6lJ098aoe59oAmK76qV6Gw60SbZ8jHuG2wH058GF4pLFbYamYrVA=="
+    },
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       "version": "3.0.0",
       "resolved": "https://registry.npmjs.org/adjust-sourcemap-loader/-/adjust-sourcemap-loader-3.0.0.tgz",
@@ -669,6 +713,11 @@
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+    "asynckit": {
+      "version": "0.4.0",
+      "resolved": "https://registry.npmjs.org/asynckit/-/asynckit-0.4.0.tgz",
+      "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k="
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@@ -816,6 +865,11 @@
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       "integrity": "sha1-EsJe/kCkXjwyPrhnWgoM5XsiNx8="
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+    "browser-process-hrtime": {
+      "version": "1.0.0",
+      "resolved": "https://registry.npmjs.org/browser-process-hrtime/-/browser-process-hrtime-1.0.0.tgz",
+      "integrity": "sha512-9o5UecI3GhkpM6DrXr69PblIuWxPKk9Y0jHBRhdocZ2y7YECBFCsHm79Pr3OyR2AvjhDkabFJaDJMYRazHgsow=="
+    },
     "browserify-aes": {
       "version": "1.2.0",
       "resolved": "https://registry.npmjs.org/browserify-aes/-/browserify-aes-1.2.0.tgz",
@@ -1134,6 +1188,14 @@
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     },
+    "combined-stream": {
+      "version": "1.0.8",
+      "resolved": "https://registry.npmjs.org/combined-stream/-/combined-stream-1.0.8.tgz",
+      "integrity": "sha512-FQN4MRfuJeHf7cBbBMJFXhKSDq+2kAArBlmRBvcvFE5BB1HZKXtSFASDhdlz9zOYwxh8lDdnvmMOe/+5cdoEdg==",
+      "requires": {
+        "delayed-stream": "~1.0.0"
+      }
+    },
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       "version": "1.0.8",
       "resolved": "https://registry.npmjs.org/comma-separated-tokens/-/comma-separated-tokens-1.0.8.tgz",
@@ -1422,6 +1484,26 @@
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       }
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+    "cssom": {
+      "version": "0.4.4",
+      "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.4.4.tgz",
+      "integrity": "sha512-p3pvU7r1MyyqbTk+WbNJIgJjG2VmTIaB10rI93LzVPrmDJKkzKYMtxxyAvQXR/NS6otuzveI7+7BBq3SjBS2mw=="
+    },
+    "cssstyle": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/cssstyle/-/cssstyle-2.3.0.tgz",
+      "integrity": "sha512-AZL67abkUzIuvcHqk7c09cezpGNcxUxU4Ioi/05xHk4DQeTkWmGYftIE6ctU6AEt+Gn4n1lDStOtj7FKycP71A==",
+      "requires": {
+        "cssom": "~0.3.6"
+      },
+      "dependencies": {
+        "cssom": {
+          "version": "0.3.8",
+          "resolved": "https://registry.npmjs.org/cssom/-/cssom-0.3.8.tgz",
+          "integrity": "sha512-b0tGHbfegbhPJpxpiBPU2sCkigAqtM9O121le6bbOlgyV+NyGyCmVfJ6QW9eRjz8CpNfWEOYBIMIGRYkLwsIYg=="
+        }
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@@ -1441,6 +1523,41 @@
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+    "data-urls": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/data-urls/-/data-urls-2.0.0.tgz",
+      "integrity": "sha512-X5eWTSXO/BJmpdIKCRuKUgSCgAN0OwliVK3yPKbwIWU1Tdw5BRajxlzMidvh+gwko9AfQ9zIj52pzF91Q3YAvQ==",
+      "requires": {
+        "abab": "^2.0.3",
+        "whatwg-mimetype": "^2.3.0",
+        "whatwg-url": "^8.0.0"
+      },
+      "dependencies": {
+        "tr46": {
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+          "resolved": "https://registry.npmjs.org/tr46/-/tr46-2.1.0.tgz",
+          "integrity": "sha512-15Ih7phfcdP5YxqiB+iDtLoaTz4Nd35+IiAv0kQ5FNKHzXgdWqPoTIqEDDJmXceQt4JZk6lVPT8lnDlPpGDppw==",
+          "requires": {
+            "punycode": "^2.1.1"
+          }
+        },
+        "webidl-conversions": {
+          "version": "6.1.0",
+          "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-6.1.0.tgz",
+          "integrity": "sha512-qBIvFLGiBpLjfwmYAaHPXsn+ho5xZnGvyGvsarywGNc8VyQJUMHJ8OBKGGrPER0okBeMDaan4mNBlgBROxuI8w=="
+        },
+        "whatwg-url": {
+          "version": "8.7.0",
+          "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.7.0.tgz",
+          "integrity": "sha512-gAojqb/m9Q8a5IV96E3fHJM70AzCkgt4uXYX2O7EmuyOnLrViCQlsEBmF9UQIu3/aeAIp2U17rtbpZWNntQqdg==",
+          "requires": {
+            "lodash": "^4.7.0",
+            "tr46": "^2.1.0",
+            "webidl-conversions": "^6.1.0"
+          }
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+      }
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     "debug": {
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       "resolved": "https://registry.npmjs.org/debug/-/debug-4.3.1.tgz",
@@ -1449,6 +1566,11 @@
         "ms": "2.1.2"
       }
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+    "decimal.js": {
+      "version": "10.3.1",
+      "resolved": "https://registry.npmjs.org/decimal.js/-/decimal.js-10.3.1.tgz",
+      "integrity": "sha512-V0pfhfr8suzyPGOx3nmq4aHqabehUZn6Ch9kyFpV79TGDTWFmHqUqXdabR7QHqxzrYolF4+tVmJhUG4OURg5dQ=="
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@@ -1469,6 +1591,11 @@
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+    "deep-is": {
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+      "resolved": "https://registry.npmjs.org/deep-is/-/deep-is-0.1.3.tgz",
+      "integrity": "sha1-s2nW+128E+7PUk+RsHD+7cNXzzQ="
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@@ -1511,6 +1638,11 @@
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+      "resolved": "https://registry.npmjs.org/delayed-stream/-/delayed-stream-1.0.0.tgz",
+      "integrity": "sha1-3zrhmayt+31ECqrgsp4icrJOxhk="
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+    "domexception": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/domexception/-/domexception-2.0.1.tgz",
+      "integrity": "sha512-yxJ2mFy/sibVQlu5qHjOkf9J3K6zgmCxgJ94u2EdvDOV09H+32LtRswEcUsmUWN72pVLOEnTSRaIVVzVQgS0dg==",
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+        "webidl-conversions": {
+          "version": "5.0.0",
+          "resolved": "https://registry.npmjs.org/webidl-conversions/-/webidl-conversions-5.0.0.tgz",
+          "integrity": "sha512-VlZwKPCkYKxQgeSbH5EyngOmRp7Ww7I9rQLERETtf5ofd9pGeswWiOtogpEO850jziPRarreGxn5QIiTqpb2wA=="
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@@ -1776,6 +1923,25 @@
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       "integrity": "sha1-G2HAViGQqN/2rjuyzwIAyhMLhtQ="
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+    "escodegen": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/escodegen/-/escodegen-2.0.0.tgz",
+      "integrity": "sha512-mmHKys/C8BFUGI+MAWNcSYoORYLMdPzjrknd2Vc+bUsjN5bXcr8EhrNB+UTqfL1y3I9c4fw2ihgtMPQLBRiQxw==",
+      "requires": {
+        "esprima": "^4.0.1",
+        "estraverse": "^5.2.0",
+        "esutils": "^2.0.2",
+        "optionator": "^0.8.1",
+        "source-map": "~0.6.1"
+      },
+      "dependencies": {
+        "estraverse": {
+          "version": "5.2.0",
+          "resolved": "https://registry.npmjs.org/estraverse/-/estraverse-5.2.0.tgz",
+          "integrity": "sha512-BxbNGGNm0RyRYvUdHpIwv9IWzeM9XClbOxwoATuFdOE7ZE6wHL+HQ5T8hoPM+zHvmKzzsEqhgy0GrQ5X13afiQ=="
+        }
+      }
+    },
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@@ -1785,6 +1951,16 @@
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       }
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+    "esm": {
+      "version": "3.2.25",
+      "resolved": "https://registry.npmjs.org/esm/-/esm-3.2.25.tgz",
+      "integrity": "sha512-U1suiZ2oDVWv4zPO56S0NcR5QriEahGtdN2OR6FiOG4WJvcjBVFB0qI4+eKoWFH483PKGuLuu6V8Z4T5g63UVA=="
+    },
+    "esprima": {
+      "version": "4.0.1",
+      "resolved": "https://registry.npmjs.org/esprima/-/esprima-4.0.1.tgz",
+      "integrity": "sha512-eGuFFw7Upda+g4p+QHvnW0RyTX/SVeJBDM/gCtMARO0cLuT2HcEKnTPvhjV6aGeqrCB/sbNop0Kszm0jsaWU4A=="
+    },
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+    "fast-levenshtein": {
+      "version": "2.0.6",
+      "resolved": "https://registry.npmjs.org/fast-levenshtein/-/fast-levenshtein-2.0.6.tgz",
+      "integrity": "sha1-PYpcZog6FqMMqGQ+hR8Zuqd5eRc="
+    },
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@@ -2068,6 +2249,16 @@
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       "integrity": "sha1-gQaNKVqBQuwKxybG4iAMMPttXoA="
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+    "form-data": {
+      "version": "3.0.1",
+      "resolved": "https://registry.npmjs.org/form-data/-/form-data-3.0.1.tgz",
+      "integrity": "sha512-RHkBKtLWUVwd7SqRIvCZMEvAMoGUp0XU+seQiZejj0COz3RI3hWP4sCv3gZWWLjJTd7rGwcsF5eKZGii0r/hbg==",
+      "requires": {
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+        "combined-stream": "^1.0.8",
+        "mime-types": "^2.1.12"
+      }
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@@ -2344,6 +2535,47 @@
         "web-namespaces": "^1.0.0"
       }
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+    "hast-util-from-dom": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/hast-util-from-dom/-/hast-util-from-dom-3.0.0.tgz",
+      "integrity": "sha512-4vQuGiD5Y/wlD7fZiY4mZML/6oh0GOnH38UNyeDFcSTE4AHF0zjKHZfbd+ekVwPvsZXRl8choc99INHUwSPJlg==",
+      "requires": {
+        "hastscript": "^6.0.0",
+        "web-namespaces": "^1.0.0"
+      }
+    },
+    "hast-util-is-element": {
+      "version": "1.1.0",
+      "resolved": "https://registry.npmjs.org/hast-util-is-element/-/hast-util-is-element-1.1.0.tgz",
+      "integrity": "sha512-oUmNua0bFbdrD/ELDSSEadRVtWZOf3iF6Lbv81naqsIV99RnSCieTbWuWCY8BAeEfKJTKl0gRdokv+dELutHGQ=="
+    },
+    "hast-util-parse-selector": {
+      "version": "2.2.5",
+      "resolved": "https://registry.npmjs.org/hast-util-parse-selector/-/hast-util-parse-selector-2.2.5.tgz",
+      "integrity": "sha512-7j6mrk/qqkSehsM92wQjdIgWM2/BW61u/53G6xmC8i1OmEdKLHbk419QKQUjz6LglWsfqoiHmyMRkP1BGjecNQ=="
+    },
+    "hast-util-to-text": {
+      "version": "2.0.1",
+      "resolved": "https://registry.npmjs.org/hast-util-to-text/-/hast-util-to-text-2.0.1.tgz",
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+      "requires": {
+        "hast-util-is-element": "^1.0.0",
+        "repeat-string": "^1.0.0",
+        "unist-util-find-after": "^3.0.0"
+      }
+    },
+    "hastscript": {
+      "version": "6.0.0",
+      "resolved": "https://registry.npmjs.org/hastscript/-/hastscript-6.0.0.tgz",
+      "integrity": "sha512-nDM6bvd7lIqDUiYEiu5Sl/+6ReP0BMk/2f4U/Rooccxkj0P5nm+acM5PrGJ/t5I8qPGiqZSE6hVAwZEdZIvP4w==",
+      "requires": {
+        "@types/hast": "^2.0.0",
+        "comma-separated-tokens": "^1.0.0",
+        "hast-util-parse-selector": "^2.0.0",
+        "property-information": "^5.0.0",
+        "space-separated-tokens": "^1.0.0"
+      }
+    },
     "he": {
       "version": "1.2.0",
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@@ -2359,6 +2591,14 @@
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@@ -5258,6 +5746,22 @@
       "resolved": "https://registry.npmjs.org/vm-browserify/-/vm-browserify-1.1.2.tgz",
       "integrity": "sha512-2ham8XPWTONajOR0ohOKOHXkm3+gaBmGut3SRuu75xLd/RRaY6vqgh8NBYYk7+RW3u5AtzPQZG8F10LHkl0lAQ=="
     },
+    "w3c-hr-time": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.2.tgz",
+      "integrity": "sha512-z8P5DvDNjKDoFIHK7q8r8lackT6l+jo/Ye3HOle7l9nICP9lf1Ci25fy9vHd0JOWewkIFzXIEig3TdKT7JQ5fQ==",
+      "requires": {
+        "browser-process-hrtime": "^1.0.0"
+      }
+    },
+    "w3c-xmlserializer": {
+      "version": "2.0.0",
+      "resolved": "https://registry.npmjs.org/w3c-xmlserializer/-/w3c-xmlserializer-2.0.0.tgz",
+      "integrity": "sha512-4tzD0mF8iSiMiNs30BiLO3EpfGLZUT2MSX/G+o7ZywDzliWQ3OPtTZ0PTC3B3ca1UAf4cJMHB+2Bf56EriJuRA==",
+      "requires": {
+        "xml-name-validator": "^3.0.0"
+      }
+    },
     "watchpack": {
       "version": "2.0.0-beta.13",
       "resolved": "https://registry.npmjs.org/watchpack/-/watchpack-2.0.0-beta.13.tgz",
@@ -5565,6 +6069,19 @@
         "source-map": "~0.6.1"
       }
     },
+    "whatwg-encoding": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/whatwg-encoding/-/whatwg-encoding-1.0.5.tgz",
+      "integrity": "sha512-b5lim54JOPN9HtzvK9HFXvBma/rnfFeqsic0hSpjtDbVxR3dJKLc+KB4V6GgiGOvl7CY/KNh8rxSo9DKQrnUEw==",
+      "requires": {
+        "iconv-lite": "0.4.24"
+      }
+    },
+    "whatwg-mimetype": {
+      "version": "2.3.0",
+      "resolved": "https://registry.npmjs.org/whatwg-mimetype/-/whatwg-mimetype-2.3.0.tgz",
+      "integrity": "sha512-M4yMwr6mAnQz76TbJm914+gPpB/nCwvZbJU28cUD6dR004SAxDLOOSUaB1JDRqLtaOV/vi0IC5lEAGFgrjGv/g=="
+    },
     "whatwg-url": {
       "version": "7.1.0",
       "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-7.1.0.tgz",
@@ -5581,6 +6098,11 @@
       "integrity": "sha1-Zws6+8VS4LVd9rd4DKdGFfI60cs=",
       "optional": true
     },
+    "wicked-good-xpath": {
+      "version": "1.3.0",
+      "resolved": "https://registry.npmjs.org/wicked-good-xpath/-/wicked-good-xpath-1.3.0.tgz",
+      "integrity": "sha1-gbDpXoZQ5JyUsiKY//hoa1VTz2w="
+    },
     "wide-align": {
       "version": "1.1.3",
       "resolved": "https://registry.npmjs.org/wide-align/-/wide-align-1.1.3.tgz",
@@ -5590,6 +6112,11 @@
         "string-width": "^1.0.2 || 2"
       }
     },
+    "word-wrap": {
+      "version": "1.2.3",
+      "resolved": "https://registry.npmjs.org/word-wrap/-/word-wrap-1.2.3.tgz",
+      "integrity": "sha512-Hz/mrNwitNRh/HUAtM/VT/5VH+ygD6DV7mYKZAtHOrbs8U7lvPS6xf7EJKMF0uW1KJCl0H701g3ZGus+muE5vQ=="
+    },
     "worker-farm": {
       "version": "1.7.0",
       "resolved": "https://registry.npmjs.org/worker-farm/-/worker-farm-1.7.0.tgz",
@@ -5603,6 +6130,26 @@
       "resolved": "https://registry.npmjs.org/wrappy/-/wrappy-1.0.2.tgz",
       "integrity": "sha1-tSQ9jz7BqjXxNkYFvA0QNuMKtp8="
     },
+    "ws": {
+      "version": "7.5.3",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.3.tgz",
+      "integrity": "sha512-kQ/dHIzuLrS6Je9+uv81ueZomEwH0qVYstcAQ4/Z93K8zeko9gtAbttJWzoC5ukqXY1PpoouV3+VSOqEAFt5wg=="
+    },
+    "xml-name-validator": {
+      "version": "3.0.0",
+      "resolved": "https://registry.npmjs.org/xml-name-validator/-/xml-name-validator-3.0.0.tgz",
+      "integrity": "sha512-A5CUptxDsvxKJEU3yO6DuWBSJz/qizqzJKOMIfUJHETbBw/sFaDxgd6fxm1ewUaM0jZ444Fc5vC5ROYurg/4Pw=="
+    },
+    "xmlchars": {
+      "version": "2.2.0",
+      "resolved": "https://registry.npmjs.org/xmlchars/-/xmlchars-2.2.0.tgz",
+      "integrity": "sha512-JZnDKK8B0RCDw84FNdDAIpZK+JuJw+s7Lz8nksI7SIuU3UXJJslUthsi+uWBUYOwPFwW7W7PRLRfUKpxjtjFCw=="
+    },
+    "xmldom-sre": {
+      "version": "0.1.31",
+      "resolved": "https://registry.npmjs.org/xmldom-sre/-/xmldom-sre-0.1.31.tgz",
+      "integrity": "sha512-f9s+fUkX04BxQf+7mMWAp5zk61pciie+fFLC9hX9UVvCeJQfNHRHXpeo5MPcR0EUf57PYLdt+ZO4f3Ipk2oZUw=="
+    },
     "xtend": {
       "version": "4.0.2",
       "resolved": "https://registry.npmjs.org/xtend/-/xtend-4.0.2.tgz",
diff --git a/site/package.json b/site/package.json
index e6c7a38..172f98b 100644
--- a/site/package.json
+++ b/site/package.json
@@ -13,6 +13,7 @@
     "orgast-util-visit-ids": "^0.3.0",
     "react": "17.0.1",
     "react-dom": "17.0.1",
+    "rehype-mathjax": "^3.1.0",
     "rehype-react": "^6.1.0",
     "rehype-url-inspector": "^2.0.2",
     "to-vfile": "^6.1.0",
diff --git a/site/src/components/Rehype.jsx b/site/src/components/Rehype.jsx
index bbc44ac..0512a61 100644
--- a/site/src/components/Rehype.jsx
+++ b/site/src/components/Rehype.jsx
@@ -1,10 +1,7 @@
 import React from 'react';
 
 import unified from 'unified';
-import orgParse from 'uniorg-parse';
-import org2rehype from 'uniorg-rehype';
 import rehype2react from 'rehype-react';
-import toc from '@jsdevtools/rehype-toc';
 
 import Link from './Link';
 import Image from './Image';
diff --git a/site/src/lib/api.js b/site/src/lib/api.js
index b667480..ae20cb8 100644
--- a/site/src/lib/api.js
+++ b/site/src/lib/api.js
@@ -1,5 +1,4 @@
 import * as path from 'path';
-import toc from '@jsdevtools/rehype-toc';
 import trough from 'trough';
 import toVFile from 'to-vfile';
 import findDown from 'vfile-find-down';
diff --git a/site/src/lib/orgToHtml.js b/site/src/lib/orgToHtml.js
index b2c9e5f..7ce0360 100644
--- a/site/src/lib/orgToHtml.js
+++ b/site/src/lib/orgToHtml.js
@@ -2,10 +2,12 @@ import unified from 'unified';
 
 import orgParse from 'uniorg-parse';
 import org2rehype from 'uniorg-rehype';
+import mathjax from 'rehype-mathjax/browser';
 import extractKeywords from 'uniorg-extract-keywords';
 import { uniorgSlug } from 'uniorg-slug';
 import { visitIds } from 'orgast-util-visit-ids';
-import toc from '@jsdevtools/rehype-toc'
+import toc from '@jsdevtools/rehype-toc';
+import visit from 'unist-util-visit';
 
 const processor = unified()
   .use(orgParse)
@@ -14,6 +16,7 @@ const processor = unified()
   .use(extractIds)
   .use(org2rehype)
   .use(toc)
+  .use(mathjax)
   .use(toJson);
 
 export default async function orgToHtml(file) {
diff --git a/site/src/pages/[[...slug]].jsx b/site/src/pages/[[...slug]].jsx
index 666017d..489d740 100644
--- a/site/src/pages/[[...slug]].jsx
+++ b/site/src/pages/[[...slug]].jsx
@@ -6,13 +6,39 @@ import { getAllPaths, getPostBySlug } from '../lib/api';
 import Link from '../components/Link';
 import Rehype from '../components/Rehype';
 
-const Note = ({ title, hast, backlinks }) => {
+const Note = ({ metadata, title, hast, backlinks }) => {
+  const date = unquote(metadata.date);
+  const date_modified = unquote(metadata.date_modified);
   return (
     <main>
       <Head>
         <title>{title}</title>
+        <script src="https://polyfill.io/v3/polyfill.min.js?features=es6"></script>
+        <script id="MathJax-script" async src="https://cdn.jsdelivr.net/npm/mathjax@3/es5/tex-mml-chtml.js"></script>
+        <script type="text/x-mathjax-config">
+                {`
+                MathJax = {
+                    tex: {
+                        inlineMath: [ ['$','$'], ['\\(','\\)'] ],
+                        displayMath: [ ['$$','$$'], ['\[','\]'] ]
+                    },
+                    options = {
+                        processHtmlClass = "math"
+                    }
+                }
+
+                console.log(MathJax)
+                `}
+        </script>
+
       </Head>
       <h1>{title}</h1>
+      <section className="post-metadata">
+        <span>Date: {date}</span>
+        <span>Date modified: {date_modified}</span>
+        {!!metadata.source &&
+        (<span>Source: <a href={metadata.source}>{metadata.source}</a></span>)}
+      </section>
       <Rehype hast={hast} />
       {!!backlinks.length && (
         <section>
@@ -42,13 +68,30 @@ export const getStaticPaths = async () => {
   };
 };
 
+function unquote(str, delimiter = '"') {
+  var re = new RegExp(`${delimiter}.+${delimiter}`);
+  if (str.match(re)) {
+    return str.substring(1, str.length - 1);
+  }
+
+  return str;
+}
+
 export const getStaticProps = async ({ params }) => {
   const path = '/' + join(...(params.slug || ['index']));
   const post = await getPostBySlug(path);
   const data = post.data;
   const backlinks = await Promise.all([...data.backlinks].map(getPostBySlug));
+  const metadata = {
+      date: data.date,
+      date_modified: data.date_modified,
+      language: data.language,
+      source: data.src || ''
+  };
+  console.log(data);
   return {
     props: {
+      metadata,
       title: data.title || post.basename,
       hast: post.result,
       backlinks: backlinks.map((b) => ({
diff --git a/site/src/styles/globals.css b/site/src/styles/globals.css
index 1beb6e1..739dc83 100644
--- a/site/src/styles/globals.css
+++ b/site/src/styles/globals.css
@@ -45,3 +45,14 @@ ol>li::before {
 img {
   max-width: 100%;
 }
+
+.post-metadata {
+  display: flex;
+  flex: 1;
+  flex-flow: column;
+  font-size: 0.9em;
+}
+
+.post-metadata > * {
+  margin-right: 0.5em;
+}