Initial outline of activitypub API

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+# API
+
+- Start with the [reddit API](https://www.reddit.com/dev/api), and find [Activitypub vocab](https://www.w3.org/TR/activitystreams-vocabulary/) to match it.
+
+<!-- toc -->
+
+- [Actors](#actors)
+  * [User / [Person](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-person)](#user--personhttpswwww3orgtractivitystreams-vocabulary%23dfn-person)
+  * [Community / [Group](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-group)](#community--grouphttpswwww3orgtractivitystreams-vocabulary%23dfn-group)
+- [Objects](#objects)
+  * [Post / [Page](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-page)](#post--pagehttpswwww3orgtractivitystreams-vocabulary%23dfn-page)
+  * [Post Listings / [Ordered CollectionPage](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-orderedcollectionpage)](#post-listings--ordered-collectionpagehttpswwww3orgtractivitystreams-vocabulary%23dfn-orderedcollectionpage)
+  * [Comment / [Note](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-note)](#comment--notehttpswwww3orgtractivitystreams-vocabulary%23dfn-note)
+  * [Comment Listings / [Ordered CollectionPage](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-orderedcollectionpage)](#comment-listings--ordered-collectionpagehttpswwww3orgtractivitystreams-vocabulary%23dfn-orderedcollectionpage)
+  * [Deleted thing / [Tombstone](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-tombstone)](#deleted-thing--tombstonehttpswwww3orgtractivitystreams-vocabulary%23dfn-tombstone)
+- [Actions](#actions)
+  * [Comments](#comments)
+    + [Create](#create)
+    + [Delete](#delete)
+    + [Update](#update)
+    + [Read](#read)
+    + [Like](#like)
+    + [Dislike](#dislike)
+  * [Posts](#posts)
+    + [Create](#create-1)
+    + [Delete](#delete-1)
+    + [Update](#update-1)
+    + [Read](#read-1)
+  * [Communities](#communities)
+    + [Create](#create-2)
+    + [Delete](#delete-2)
+    + [Update](#update-2)
+    + [Join](#join)
+    + [Leave](#leave)
+
+<!-- tocstop -->
+
+;
+## Actors
+
+### User / [Person](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-person)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "type": "Person",
+  "id": "https://rust-reddit-fediverse/api/v1/user/sally_smith",
+  "name": "Sally Smith", // Their chosen alias
+  "icon"?: {
+    "type": "Image",
+    "name": "User icon",
+    "url": "https://rust-reddit-fediverse/api/v1/user/sally_smith/icon.png",
+    "width": 32,
+    "height": 32
+  },
+  "startTime": "2014-12-31T23:00:00-08:00",
+  "summary"?: "This is sally's profile."
+}
+```
+
+### Community / [Group](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-group)
+
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "type": "Group",
+  "id": "https://rust-reddit-fediverse/api/v1/community/today_i_learned",
+  "name": "today_i_learned"
+  "attributedTo": [ // The moderators
+    "http://joe.example.org",
+  ],
+  "startTime": "2014-12-31T23:00:00-08:00",
+  "summary"?: "The group's tagline",
+  "attachment: [{}] // TBD, these would be where strong types for custom styles, and images would work.
+}
+```
+
+## Objects
+
+### Post / [Page](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-page) 
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "type": "Page",
+  "id": "https://rust-reddit-fediverse/api/v1/post/1",
+  "name": "The title of a post, maybe a link to imgur",
+  "url": "https://news.blah.com"
+  "attributedTo": "http://joe.example.org", // The poster
+  "startTime": "2014-12-31T23:00:00-08:00",
+
+}
+```
+
+### Post Listings / [Ordered CollectionPage](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-orderedcollectionpage)
+
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Page 1 of Sally's front page",
+  "type": "OrderedCollectionPage",
+  "id": "https://rust-reddit-fediverse/api/v1/posts?type={all, best, front}&sort={}&page=1,
+  "partOf": "http://example.org/foo",
+  "orderedItems": [Posts]
+}
+```
+
+### Comment / [Note](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-note)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "type": "Note",
+  "id": "https://rust-reddit-fediverse/api/v1/comment/1",
+  "name": "A note",
+  "content": "Looks like it is going to rain today. Bring an umbrella!"
+  "attributedTo": "http://sally.example.org",
+  "inReplyTo": "comment or post id",
+  "startTime": "2014-12-31T23:00:00-08:00",
+  "updated"?: "2014-12-12T12:12:12Z"
+  "replies" // TODO, not sure if these objects should embed all replies in them or not.
+}
+```
+### Comment Listings / [Ordered CollectionPage](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-orderedcollectionpage)
+
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Page 1 of comments for",
+  "type": "OrderedCollectionPage",
+  "id": "https://rust-reddit-fediverse/api/v1/comments?type={all,user,community,post,parent_comment}&id=1&page=1,
+  "partOf": "http://example.org/foo",
+  "orderedItems": [Comments]
+}
+```
+### Deleted thing / [Tombstone](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-tombstone)
+```
+{
+  "type": "Tombstone",
+  "formerType": "Note / Post",
+  "id": note / post_id,
+  "deleted": "2016-03-17T00:00:00Z"
+}
+```
+## Actions
+
+### Comments
+
+#### [Create](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-create)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally created a note",
+  "type": "Create",
+  "actor": id,
+  "object": comment_id, or post_id
+}
+```
+
+#### [Delete](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-delete)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally deleted a note",
+  "type": "Delete",
+  "actor": id,
+  "object": comment_id, or post_id
+}
+```
+#### [Update](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-update)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally created a note",
+  "type": "Create",
+  "actor": id,
+  "object": comment_id, or post_id
+  "content": "New comment",
+  "updated": "New Date"
+}
+```
+#### [Read](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-read)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally read a comment",
+  "type": "Read",
+  "actor": user_id
+  "object": comment_id
+}
+```
+
+#### [Like](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-like)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally liked a comment",
+  "type": "Like",
+  "actor": user_id
+  "object": comment_id
+  // TODO different types of reactions, or no?
+}
+```
+#### [Dislike](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-dislike)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally disliked a comment",
+  "type": "Dislike",
+  "actor": user_id
+  "object": comment_id
+  // TODO different types of reactions, or no?
+}
+```
+
+### Posts
+
+#### [Create](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-create)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally created a post",
+  "type": "Create",
+  "actor": id,
+  "object": post_id
+}
+```
+#### [Delete](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-delete)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally deleted a post",
+  "type": "Delete",
+  "actor": id,
+  "object": comment_id, or post_id
+}
+```
+
+#### [Update](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-update)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally created a post",
+  "type": "Create",
+  "actor": id,
+  "object": comment_id, or post_id
+  TODO fields.
+}
+```
+#### [Read](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-read)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally read a post",
+  "type": "Read",
+  "actor": user_id
+  "object": post_id
+}
+```
+
+### Communities
+#### [Create](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-create)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally created a community",
+  "type": "Create",
+  "actor": id,
+  "object": community_id
+}
+```
+#### [Delete](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-delete)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally deleted a community",
+  "type": "Delete",
+  "actor": id,
+  "object": community_id
+}
+```
+
+#### [Update](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-update)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally created a community",
+  "type": "Create",
+  "actor": id,
+  "object": community_id
+  TODO fields.
+}
+```
+
+#### [Join](https://www.w3.org/TR/activitystreams-vocabulary/#dfn-join)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally joined a community",
+  "type": "Join",
+  "actor": user_id,
+  "object": community_id
+}
+```
+
+#### [Leave](https://www.w3.org/TR/activitystreams-vocabulary#dfn-leave)
+```
+{
+  "@context": "https://www.w3.org/ns/activitystreams",
+  "summary": "Sally left a community",
+  "type": "Leave",
+  "actor": user_id,
+  "object": community_id
+}
+```
+
+TODO - Moderator actions