Add public blocks to /about/blocks (#11298)

* Add automatic blocklist display in /about/blocks

Inspired by https://github.com/Gargron/mastodon.social-misc

* Add admin option to set who can see instance blocks

* Normalize locales files

* Rename “Sandbox” to “Silence” for consistency

* Disable /about/blocks when in whitelist mode

* Optionally display rationale for domain blocks

* Only display domain blocks that have user-facing limitations, and order them

* Redesign table of blocked domains to better handle long domain names and rationales

* Change domain blocks ordering now that rationales aren't displayed right away

* Only show explanation for block severities actually in use

* Reword instance block explanations and add disclaimer for public fetch mode

2 files changed, 76 insertions, 0 deletions

diff --git a/app/javascript/packs/public.js b/app/javascript/packs/public.js
index b58622a8d..c5cd7129f 100644
--- a/app/javascript/packs/public.js
+++ b/app/javascript/packs/public.js
@@ -141,6 +141,15 @@ function main() {
     return false;
   });
 
+  delegate(document, '.blocks-table button.icon-button', 'click', function(e) {
+    e.preventDefault();
+
+    const classList = this.firstElementChild.classList;
+    classList.toggle('fa-chevron-down');
+    classList.toggle('fa-chevron-up');
+    this.parentElement.parentElement.nextElementSibling.classList.toggle('hidden');
+  });
+
   delegate(document, '.modal-button', 'click', e => {
     e.preventDefault();
 
diff --git a/app/javascript/styles/mastodon/tables.scss b/app/javascript/styles/mastodon/tables.scss
index 11ac6dfeb..fe6beba5d 100644
--- a/app/javascript/styles/mastodon/tables.scss
+++ b/app/javascript/styles/mastodon/tables.scss
@@ -241,3 +241,70 @@ a.table-action-link {
     }
   }
 }
+
+.blocks-table {
+  width: 100%;
+  max-width: 100%;
+  border-spacing: 0;
+  border-collapse: collapse;
+  table-layout: fixed;
+  border: 1px solid darken($ui-base-color, 8%);
+
+  thead {
+    border: 1px solid darken($ui-base-color, 8%);
+    background: darken($ui-base-color, 4%);
+    font-weight: 500;
+
+    th.severity-column {
+      width: 120px;
+    }
+
+    th.button-column {
+      width: 23px;
+    }
+  }
+
+  tbody > tr {
+    border: 1px solid darken($ui-base-color, 8%);
+    border-bottom: 0;
+    background: darken($ui-base-color, 4%);
+
+    &:hover {
+      background: darken($ui-base-color, 2%);
+    }
+
+    &.even {
+      background: $ui-base-color;
+
+      &:hover {
+        background: lighten($ui-base-color, 2%);
+      }
+    }
+
+    &.rationale {
+      background: lighten($ui-base-color, 4%);
+      border-top: 0;
+
+      &:hover {
+        background: lighten($ui-base-color, 6%);
+      }
+
+      &.hidden {
+        display: none;
+      }
+    }
+
+    td:first-child {
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
+  }
+
+  th,
+  td {
+    padding: 8px;
+    line-height: 18px;
+    vertical-align: top;
+    text-align: left;
+  }
+}