From fe52dae6bd8508bfb79ba5e534a384a9e5e96b5d Mon Sep 17 00:00:00 2001
From: David Teller <d.o.teller+github@gmail.com>
Date: Fri, 22 Jan 2021 14:41:20 +0100
Subject: FIXUP: Documenting
 /_synapse/admin/v1/rooms/<room_id>/context/<event_id>

---
 docs/admin_api/rooms.md | 119 ++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 119 insertions(+)

diff --git a/docs/admin_api/rooms.md b/docs/admin_api/rooms.md
index f34cec1ff7..6d737c5be1 100644
--- a/docs/admin_api/rooms.md
+++ b/docs/admin_api/rooms.md
@@ -10,6 +10,7 @@
   * [Undoing room shutdowns](#undoing-room-shutdowns)
 - [Make Room Admin API](#make-room-admin-api)
 - [Forward Extremities Admin API](#forward-extremities-admin-api)
+- [Event Context API](#event-context-api)
 
 # List Room API
 
@@ -564,3 +565,121 @@ that were deleted.
   "deleted": 1
 }
 ```
+
+# Event Context API
+
+This API lets a client find the context of an event. This is designed primarily to investigate abuse reports.
+
+```
+GET /_synapse/admin/v1/rooms/<room_id>/context/<event_id>
+```
+
+This API mimmicks [GET /_matrix/client/r0/rooms/{roomId}/context/{eventId}](https://matrix.org/docs/spec/client_server/r0.6.1#get-matrix-client-r0-rooms-roomid-context-eventid). Please refer to the link for all details on parameters and reseponse.
+
+Example response:
+
+```json
+{
+  "end": "t29-57_2_0_2",
+  "events_after": [
+    {
+      "content": {
+        "body": "This is an example text message",
+        "msgtype": "m.text",
+        "format": "org.matrix.custom.html",
+        "formatted_body": "<b>This is an example text message</b>"
+      },
+      "type": "m.room.message",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      }
+    }
+  ],
+  "event": {
+    "content": {
+      "body": "filename.jpg",
+      "info": {
+        "h": 398,
+        "w": 394,
+        "mimetype": "image/jpeg",
+        "size": 31037
+      },
+      "url": "mxc://example.org/JWEIFJgwEIhweiWJE",
+      "msgtype": "m.image"
+    },
+    "type": "m.room.message",
+    "event_id": "$f3h4d129462ha:example.com",
+    "room_id": "!636q39766251:example.com",
+    "sender": "@example:example.org",
+    "origin_server_ts": 1432735824653,
+    "unsigned": {
+      "age": 1234
+    }
+  },
+  "events_before": [
+    {
+      "content": {
+        "body": "something-important.doc",
+        "filename": "something-important.doc",
+        "info": {
+          "mimetype": "application/msword",
+          "size": 46144
+        },
+        "msgtype": "m.file",
+        "url": "mxc://example.org/FHyPlCeYUSFFxlgbQYZmoEoe"
+      },
+      "type": "m.room.message",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      }
+    }
+  ],
+  "start": "t27-54_2_0_2",
+  "state": [
+    {
+      "content": {
+        "creator": "@example:example.org",
+        "room_version": "1",
+        "m.federate": true,
+        "predecessor": {
+          "event_id": "$something:example.org",
+          "room_id": "!oldroom:example.org"
+        }
+      },
+      "type": "m.room.create",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      },
+      "state_key": ""
+    },
+    {
+      "content": {
+        "membership": "join",
+        "avatar_url": "mxc://example.org/SEsfnsuifSDFSSEF",
+        "displayname": "Alice Margatroid"
+      },
+      "type": "m.room.member",
+      "event_id": "$143273582443PhrSn:example.org",
+      "room_id": "!636q39766251:example.com",
+      "sender": "@example:example.org",
+      "origin_server_ts": 1432735824653,
+      "unsigned": {
+        "age": 1234
+      },
+      "state_key": "@alice:example.org"
+    }
+  ]
+}
+```
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