8 files changed, 99 insertions, 0 deletions
diff --git a/src/common/remote/activitypub/context.ts b/src/common/remote/activitypub/renderer/context.ts
index b56f727ae7..b56f727ae7 100644
--- a/src/common/remote/activitypub/context.ts
+++ b/src/common/remote/activitypub/renderer/context.ts
diff --git a/src/common/remote/activitypub/renderer/document.ts b/src/common/remote/activitypub/renderer/document.ts
new file mode 100644
index 0000000000..4a456416a9
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/document.ts
@@ -0,0 +1,7 @@
+import config from '../../../../conf';
+
+export default ({ _id, contentType }) => ({
+	type: 'Document',
+	mediaType: contentType,
+	url: `${config.drive_url}/${_id}`
+});
diff --git a/src/common/remote/activitypub/renderer/hashtag.ts b/src/common/remote/activitypub/renderer/hashtag.ts
new file mode 100644
index 0000000000..ad42700204
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/hashtag.ts
@@ -0,0 +1,7 @@
+import config from '../../../../conf';
+
+export default tag => ({
+	type: 'Hashtag',
+	href: `${config.url}/search?q=#${encodeURIComponent(tag)}`,
+	name: '#' + tag
+});
diff --git a/src/common/remote/activitypub/renderer/image.ts b/src/common/remote/activitypub/renderer/image.ts
new file mode 100644
index 0000000000..345fbbec59
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/image.ts
@@ -0,0 +1,6 @@
+import config from '../../../../conf';
+
+export default ({ _id }) => ({
+	type: 'Image',
+	url: `${config.drive_url}/${_id}`
+});
diff --git a/src/common/remote/activitypub/renderer/key.ts b/src/common/remote/activitypub/renderer/key.ts
new file mode 100644
index 0000000000..7148c59745
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/key.ts
@@ -0,0 +1,9 @@
+import config from '../../../../conf';
+import { extractPublic } from '../../../../crypto_key';
+import { ILocalAccount } from '../../../../models/user';
+
+export default ({ username, account }) => ({
+	type: 'Key',
+	owner: `${config.url}/@${username}`,
+	publicKeyPem: extractPublic((account as ILocalAccount).keypair)
+});
diff --git a/src/common/remote/activitypub/renderer/note.ts b/src/common/remote/activitypub/renderer/note.ts
new file mode 100644
index 0000000000..2fe20b2136
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/note.ts
@@ -0,0 +1,44 @@
+import renderDocument from './document';
+import renderHashtag from './hashtag';
+import config from '../../../../conf';
+import DriveFile from '../../../../models/drive-file';
+import Post from '../../../../models/post';
+import User from '../../../../models/user';
+
+export default async (user, post) => {
+	const promisedFiles = DriveFile.find({ _id: { $in: post.mediaIds } });
+	let inReplyTo;
+
+	if (post.replyId) {
+		const inReplyToPost = await Post.findOne({
+			_id: post.replyId,
+		});
+
+		if (inReplyToPost !== null) {
+			const inReplyToUser = await User.findOne({
+				_id: post.userId,
+			});
+
+			if (inReplyToUser !== null) {
+				inReplyTo = `${config.url}@${inReplyToUser.username}/${inReplyToPost._id}`;
+			}
+		}
+	} else {
+		inReplyTo = null;
+	}
+
+	const attributedTo = `${config.url}/@${user.username}`;
+
+	return {
+		id: `${attributedTo}/${post._id}`,
+		type: 'Note',
+		attributedTo,
+		content: post.textHtml,
+		published: post.createdAt.toISOString(),
+		to: 'https://www.w3.org/ns/activitystreams#Public',
+		cc: `${attributedTo}/followers`,
+		inReplyTo,
+		attachment: (await promisedFiles).map(renderDocument),
+		tag: post.tags.map(renderHashtag)
+	};
+};
diff --git a/src/common/remote/activitypub/renderer/ordered-collection.ts b/src/common/remote/activitypub/renderer/ordered-collection.ts
new file mode 100644
index 0000000000..2ca0f77354
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/ordered-collection.ts
@@ -0,0 +1,6 @@
+export default (id, totalItems, orderedItems) => ({
+	id,
+	type: 'OrderedCollection',
+	totalItems,
+	orderedItems
+});
diff --git a/src/common/remote/activitypub/renderer/person.ts b/src/common/remote/activitypub/renderer/person.ts
new file mode 100644
index 0000000000..7303b30385
--- /dev/null
+++ b/src/common/remote/activitypub/renderer/person.ts
@@ -0,0 +1,20 @@
+import renderImage from './image';
+import renderKey from './key';
+import config from '../../../../conf';
+
+export default user => {
+	const id = `${config.url}/@${user.username}`;
+
+	return {
+		type: 'Person',
+		id,
+		inbox: `${id}/inbox`,
+		outbox: `${id}/outbox`,
+		preferredUsername: user.username,
+		name: user.name,
+		summary: user.description,
+		icon: user.avatarId && renderImage({ _id: user.avatarId }),
+		image: user.bannerId && renderImage({ _id: user.bannerId }),
+		publicKey: renderKey(user)
+	};
+};