add: community settings ui

TODO: add community read/write access settings
TODO: add profile settings
TODO: profile following in ui
TODO: community joining and membership management in ui

crates/shared/src/markdown.rs

@@ -0,0 +1,44 @@
+use ammonia::Builder;
+use comrak::{Options, markdown_to_html};
+use std::collections::HashSet;
+
+/// Render markdown input into HTML
+pub fn render_markdown(input: &str) -> String {
+    let mut options = Options::default();
+
+    options.extension.table = true;
+    options.extension.superscript = true;
+    options.extension.strikethrough = true;
+    options.extension.autolink = true;
+    options.extension.header_ids = Option::Some(String::new());
+    options.extension.tagfilter = true;
+    options.render.unsafe_ = true;
+    // options.render.escape = true;
+    options.parse.smart = false;
+
+    let html = markdown_to_html(input, &options);
+
+    let mut allowed_attributes = HashSet::new();
+    allowed_attributes.insert("id");
+    allowed_attributes.insert("class");
+    allowed_attributes.insert("ref");
+    allowed_attributes.insert("aria-label");
+    allowed_attributes.insert("lang");
+    allowed_attributes.insert("title");
+    allowed_attributes.insert("align");
+
+    allowed_attributes.insert("data-color");
+    allowed_attributes.insert("data-font-family");
+
+    Builder::default()
+        .generic_attributes(allowed_attributes)
+        .clean(&html)
+        .to_string()
+        .replace(
+            "src=\"",
+            "loading=\"lazy\" src=\"/api/v1/util/ext/image?img=",
+        )
+        .replace("--&gt;", "<align class=\"right\">")
+        .replace("-&gt;", "<align class=\"center\">")
+        .replace("&lt;-", "</align>")
+}