Profile redirect notes (#5746)

* Serialize moved accounts into REST and ActivityPub APIs

* Parse federated moved accounts from ActivityPub

* Add note about moved accounts to public profiles

* Add moved account message to web UI

* Fix code style issues

2 files changed, 112 insertions, 0 deletions

diff --git a/app/javascript/styles/mastodon/components.scss b/app/javascript/styles/mastodon/components.scss
index 0ded6f159..b70769e18 100644
--- a/app/javascript/styles/mastodon/components.scss
+++ b/app/javascript/styles/mastodon/components.scss
@@ -917,6 +917,18 @@
   background-position: center;
   position: relative;
 
+  &.inactive {
+    opacity: 0.5;
+
+    .account__header__avatar {
+      filter: grayscale(100%);
+    }
+
+    .account__header__username {
+      color: $ui-primary-color;
+    }
+  }
+
   & > div {
     background: rgba(lighten($ui-base-color, 4%), 0.9);
     padding: 20px 10px;
@@ -4375,3 +4387,40 @@ noscript {
     }
   }
 }
+
+.account__moved-note {
+  padding: 14px 10px;
+  padding-bottom: 16px;
+  background: lighten($ui-base-color, 4%);
+  border-top: 1px solid lighten($ui-base-color, 8%);
+  border-bottom: 1px solid lighten($ui-base-color, 8%);
+
+  &__message {
+    position: relative;
+    margin-left: 58px;
+    color: $ui-base-lighter-color;
+    padding: 8px 0;
+    padding-top: 0;
+    padding-bottom: 4px;
+    font-size: 14px;
+
+    > span {
+      display: block;
+      overflow: hidden;
+      text-overflow: ellipsis;
+    }
+  }
+
+  &__icon-wrapper {
+    left: -26px;
+    position: absolute;
+  }
+
+  .detailed-status__display-avatar {
+    position: relative;
+  }
+
+  .detailed-status__display-name {
+    margin-bottom: 0;
+  }
+}
diff --git a/app/javascript/styles/mastodon/landing_strip.scss b/app/javascript/styles/mastodon/landing_strip.scss
index 0bf9daafd..2f7c98d54 100644
--- a/app/javascript/styles/mastodon/landing_strip.scss
+++ b/app/javascript/styles/mastodon/landing_strip.scss
@@ -34,3 +34,66 @@
 .memoriam-strip {
   background: rgba($base-shadow-color, 0.7);
 }
+
+.moved-strip {
+  padding: 14px;
+  border-radius: 4px;
+  background: rgba(darken($ui-base-color, 7%), 0.8);
+  color: $ui-secondary-color;
+  font-weight: 400;
+  margin-bottom: 20px;
+
+  strong,
+  a {
+    font-weight: 500;
+  }
+
+  a {
+    color: inherit;
+    text-decoration: underline;
+
+    &.mention {
+      text-decoration: none;
+
+      span {
+        text-decoration: none;
+      }
+
+      &:focus,
+      &:hover,
+      &:active {
+        text-decoration: none;
+
+        span {
+          text-decoration: underline;
+        }
+      }
+    }
+  }
+
+  &__message {
+    margin-bottom: 15px;
+
+    .fa {
+      margin-right: 5px;
+      color: $ui-primary-color;
+    }
+  }
+
+  &__card {
+    .detailed-status__display-avatar {
+      position: relative;
+      cursor: pointer;
+    }
+
+    .detailed-status__display-name {
+      margin-bottom: 0;
+      text-decoration: none;
+
+      span {
+        color: $ui-highlight-color;
+        font-weight: 400;
+      }
+    }
+  }
+}