From 8d34f8de531bb6d0bb802f017d38a99483e0b76a Mon Sep 17 00:00:00 2001
From: Thumbscrew <thumbscrw@pm.me>
Date: Sun, 3 Apr 2022 21:03:57 +0100
Subject: [PATCH] add `Get-MatrixRoomMessages`

---
 PSMatrix.psd1                     |  3 +-
 public/Get-MatrixRoomMessages.ps1 | 77 +++++++++++++++++++++++++++++++
 2 files changed, 79 insertions(+), 1 deletion(-)
 create mode 100644 public/Get-MatrixRoomMessages.ps1

diff --git a/PSMatrix.psd1 b/PSMatrix.psd1
index fe10bf3..69f46a7 100644
--- a/PSMatrix.psd1
+++ b/PSMatrix.psd1
@@ -74,7 +74,8 @@ FunctionsToExport = @(
     'Remove-MatrixAccessToken',
     'Get-MatrixJoinedRooms',
     'Get-MatrixJoinedMembers',
-    'Get-MatrixRoomId'
+    'Get-MatrixRoomId',
+    'Get-MatrixRoomMessages'
 )
 
 # Cmdlets to export from this module, for best performance, do not use wildcards and do not delete the entry, use an empty array if there are no cmdlets to export.
diff --git a/public/Get-MatrixRoomMessages.ps1 b/public/Get-MatrixRoomMessages.ps1
new file mode 100644
index 0000000..8c6b1f8
--- /dev/null
+++ b/public/Get-MatrixRoomMessages.ps1
@@ -0,0 +1,77 @@
+function Get-MatrixRoomMessages {
+    param(
+        [Parameter(Mandatory)]
+        [string]$ServerUrl,
+
+        [Parameter(Mandatory)]
+        [SecureString]$AccessToken,
+
+        [Parameter(Mandatory)]
+        [string]$UserId,
+
+        [Parameter(Mandatory)]
+        [string]$RoomId,
+
+        [Parameter(Mandatory = $false)]
+        [int]$Limit = 50
+    )
+
+    Write-Debug "URL: $url"
+    $headers = Get-MatrixAuthHeaders -AccessToken $AccessToken
+
+    try {
+        $filterUrl = New-MatrixUrl -ServerUrl $ServerUrl -ApiPath "_matrix/client/v3/user/$UserId/filter"
+        $filter = [PSCustomObject]@{
+            room = @{
+                rooms = @(
+                    $RoomId
+                )
+                timeline = @{
+                    limit = $Limit
+                    rooms = @(
+                        $RoomId
+                    )
+                    types = @(
+                        "m.room.message"
+                    )
+                }
+            }
+        } | ConvertTo-Json -Depth 3
+
+        $filterRes = Invoke-RestMethod -Uri $filterUrl -Method "POST" -Headers $headers -Body $filter
+    } catch {
+        Write-Error $_
+        return
+    }
+
+    try {
+        $filterId = $filterRes.filter_id
+        $url = New-MatrixUrl -ServerUrl $ServerUrl `
+            -ApiPath ("_matrix/client/v3/sync" `
+            + "?filter=$filterId" `
+            + "&full_state=true&set_presence=offline")
+
+        $res = Invoke-RestMethod -Uri $url -Headers $headers
+    } catch {
+        Write-Error $_
+    }
+
+    $events = $res.rooms.join.($RoomId).timeline.events
+
+    $formattedEvents = @()
+
+    $events | ForEach-Object {
+        $formattedEvent = [PSCustomObject]@{
+            EventID = $_.event_id
+            Sender = $_.sender
+            Body = $_.content.body
+            Format = $_.content.format
+            FormattedBody = $_.content.formatted_body
+            MsgType = $_.content.msgtype
+        }
+
+        $formattedEvents += $formattedEvent
+    }
+
+    return $formattedEvents
+}
\ No newline at end of file