6 files changed, 106 insertions, 1 deletions
diff --git a/src/server/api/common/inject-promo.ts b/src/server/api/common/inject-promo.ts
new file mode 100644
index 0000000000..785d7af085
--- /dev/null
+++ b/src/server/api/common/inject-promo.ts
@@ -0,0 +1,36 @@
+import rndstr from 'rndstr';
+import { Note } from '../../../models/entities/note';
+import { User } from '../../../models/entities/user';
+import { PromoReads, PromoNotes, Notes, Users } from '../../../models';
+import { ensure } from '../../../prelude/ensure';
+
+export async function injectPromo(user: User, timeline: Note[]) {
+	if (timeline.length < 5) return;
+
+	// TODO: readやexpireフィルタはクエリ側でやる
+
+	const reads = await PromoReads.find({
+		userId: user.id
+	});
+
+	let promos = await PromoNotes.find();
+
+	promos = promos.filter(n => n.expiresAt.getTime() > Date.now());
+	promos = promos.filter(n => !reads.map(r => r.noteId).includes(n.noteId));
+
+	if (promos.length === 0) return;
+
+	const promo = promos[Math.floor(Math.random() * promos.length)];
+
+	// Pick random promo
+	const note = await Notes.findOne(promo.noteId).then(ensure);
+
+	// Join
+	note.user = await Users.findOne(note.userId).then(ensure);
+
+	(note as any)._prInjectionId_ = rndstr('a-z0-9', 8);
+
+	// Inject promo
+	timeline.splice(3, 0, note);
+	timeline.pop();
+}
diff --git a/src/server/api/endpoints/admin/promo/create.ts b/src/server/api/endpoints/admin/promo/create.ts
new file mode 100644
index 0000000000..50fbb6563c
--- /dev/null
+++ b/src/server/api/endpoints/admin/promo/create.ts
@@ -0,0 +1,58 @@
+import $ from 'cafy';
+import { ID } from '../../../../../misc/cafy-id';
+import define from '../../../define';
+import { ApiError } from '../../../error';
+import { getNote } from '../../../common/getters';
+import { PromoNotes } from '../../../../../models';
+
+export const meta = {
+	requireCredential: true as const,
+	requireModerator: true,
+
+	params: {
+		noteId: {
+			validator: $.type(ID),
+		},
+
+		expiresAt: {
+			validator: $.num.int()
+		},
+	},
+
+	errors: {
+		noSuchNote: {
+			message: 'No such note.',
+			code: 'NO_SUCH_NOTE',
+			id: 'ee449fbe-af2a-453b-9cae-cf2fe7c895fc'
+		},
+
+		alreadyPromoted: {
+			message: 'The note has already promoted.',
+			code: 'ALREADY_PROMOTED',
+			id: 'ae427aa2-7a41-484f-a18c-2c1104051604'
+		},
+	}
+};
+
+export default define(meta, async (ps, user) => {
+	// Get favoritee
+	const note = await getNote(ps.noteId).catch(e => {
+		if (e.id === '9725d0ce-ba28-4dde-95a7-2cbb2c15de24') throw new ApiError(meta.errors.noSuchNote);
+		throw e;
+	});
+
+	// if already favorited
+	const exist = await PromoNotes.findOne(note.id);
+
+	if (exist != null) {
+		throw new ApiError(meta.errors.alreadyPromoted);
+	}
+
+	// Create favorite
+	await PromoNotes.save({
+		noteId: note.id,
+		createdAt: new Date(),
+		expiresAt: new Date(ps.expiresAt),
+		userId: note.userId,
+	});
+});
diff --git a/src/server/api/endpoints/notes/global-timeline.ts b/src/server/api/endpoints/notes/global-timeline.ts
index 7475c8f078..0f69896de2 100644
--- a/src/server/api/endpoints/notes/global-timeline.ts
+++ b/src/server/api/endpoints/notes/global-timeline.ts
@@ -7,8 +7,8 @@ import { makePaginationQuery } from '../../common/make-pagination-query';
 import { Notes } from '../../../../models';
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { activeUsersChart } from '../../../../services/chart';
-import { Brackets } from 'typeorm';
 import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { injectPromo } from '../../common/inject-promo';
 
 export const meta = {
 	desc: {
@@ -90,6 +90,8 @@ export default define(meta, async (ps, user) => {
 
 	const timeline = await query.take(ps.limit!).getMany();
 
+	await injectPromo(user, timeline);
+
 	process.nextTick(() => {
 		if (user) {
 			activeUsersChart.update(user);
diff --git a/src/server/api/endpoints/notes/hybrid-timeline.ts b/src/server/api/endpoints/notes/hybrid-timeline.ts
index 5aa18b2e91..f30fbab8a1 100644
--- a/src/server/api/endpoints/notes/hybrid-timeline.ts
+++ b/src/server/api/endpoints/notes/hybrid-timeline.ts
@@ -10,6 +10,7 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { generateMuteQuery } from '../../common/generate-mute-query';
 import { activeUsersChart } from '../../../../services/chart';
 import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { injectPromo } from '../../common/inject-promo';
 
 export const meta = {
 	desc: {
@@ -169,6 +170,8 @@ export default define(meta, async (ps, user) => {
 
 	const timeline = await query.take(ps.limit!).getMany();
 
+	await injectPromo(user, timeline);
+
 	process.nextTick(() => {
 		if (user) {
 			activeUsersChart.update(user);
diff --git a/src/server/api/endpoints/notes/local-timeline.ts b/src/server/api/endpoints/notes/local-timeline.ts
index 06f00969ac..68558fb84b 100644
--- a/src/server/api/endpoints/notes/local-timeline.ts
+++ b/src/server/api/endpoints/notes/local-timeline.ts
@@ -10,6 +10,7 @@ import { generateVisibilityQuery } from '../../common/generate-visibility-query'
 import { activeUsersChart } from '../../../../services/chart';
 import { Brackets } from 'typeorm';
 import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { injectPromo } from '../../common/inject-promo';
 
 export const meta = {
 	desc: {
@@ -122,6 +123,8 @@ export default define(meta, async (ps, user) => {
 
 	const timeline = await query.take(ps.limit!).getMany();
 
+	await injectPromo(user, timeline);
+
 	process.nextTick(() => {
 		if (user) {
 			activeUsersChart.update(user);
diff --git a/src/server/api/endpoints/notes/timeline.ts b/src/server/api/endpoints/notes/timeline.ts
index 2c25fbc968..8edf303e0d 100644
--- a/src/server/api/endpoints/notes/timeline.ts
+++ b/src/server/api/endpoints/notes/timeline.ts
@@ -8,6 +8,7 @@ import { generateMuteQuery } from '../../common/generate-mute-query';
 import { activeUsersChart } from '../../../../services/chart';
 import { Brackets } from 'typeorm';
 import { generateRepliesQuery } from '../../common/generate-replies-query';
+import { injectPromo } from '../../common/inject-promo';
 
 export const meta = {
 	desc: {
@@ -155,6 +156,8 @@ export default define(meta, async (ps, user) => {
 
 	const timeline = await query.take(ps.limit!).getMany();
 
+	await injectPromo(user, timeline);
+
 	process.nextTick(() => {
 		if (user) {
 			activeUsersChart.update(user);