Added Invoke-BackupJob for performing full backup

Author: alan-null

Slack.Backup/Private/Get-RequestHeader.ps1 renamed to Slack.Backup/Private/api/Get-RequestHeader.ps1

@@ -0,0 +1,55 @@
+function Invoke-ChannelBackup {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true, Position = 0 )]
+        [string]$Token,
+        [Parameter(Mandatory = $true, Position = 1 )]
+        [string]$ChannelID,
+        [Parameter(Mandatory = $true, Position = 2 )]
+        [string]$Location
+    )
+    process {
+        Write-Verbose "Cmdlet Invoke-ChannelBackup - Process"
+
+        $messages = @()
+        $start = Convert-DateToEpoch (Get-Date "2000-01-01")
+
+        if (Test-Path $Location) {
+            $messages = Get-Content -Path $Location -encoding UTF8 | ConvertFrom-Json
+            $last = $messages | Select-Object -Last 1
+            $start = $last.ts
+        }
+        Write-Verbose "Get-ChannelNewMessages [$ChannelId][$(Convert-EpochToDate $Start)]"
+        [array]$newMessages = Get-FullHistory -Token $key -ChannelId $ChannelId -Start $start
+
+        $ids = $messages.client_msg_id
+        $threadDeep = Convert-DateToEpoch (Get-Date).AddDays(-90)
+        $threaded = $messages | ? { $_.reply_count -ne $null } | ? { [double]$_.ts -le $start -and [double]$_.ts -gt $threadDeep }
+        $threaded | % {
+            $om = $_
+            $response = Get-Thread -Token $key -ChannelId $ChannelId -ThreadTs $om.thread_ts
+            if ($response.ok -eq $true) {
+                $replies = $response.messages
+                $nm = $replies | Select-Object -First 1
+                if ($nm -and ([double]$nm.latest_reply) -gt ([double]$om.latest_reply)) {
+                    Write-Verbose "Update parent message: $($om.client_msg_id)"
+                    $index = $messages.IndexOf($om)
+                    $messages.Item($index) = $nm
+
+                    $replies | Select-Object -Skip 1 | % {
+                        $m = $_
+                        if ($ids.Contains($m.client_msg_id) -eq $false) {
+                            Write-Verbose "Adding new thread meassage: $($m.client_msg_id)"
+                            $newMessages += $m
+                        }
+                    }
+                }
+            }
+        }
+
+        if ($newMessages.Count -gt 0) {
+            $messages += $newMessages
+            $messages | Sort-Object -Property @{Expression = { [double]$_.ts } } | ConvertTo-Json -Depth 100 | Set-Content -Path $Location
+        }
+    }
+}

Slack.Backup/Private/Invoke-SlackAPI.ps1 renamed to Slack.Backup/Private/api/Invoke-SlackAPI.ps1

@@ -0,0 +1,23 @@
+function Invoke-ChannelsBackup {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true, Position = 0 )]
+        [string]$Token,
+        [Parameter(Mandatory = $true, Position = 1 )]
+        [string]$Location
+    )
+    process {
+        Write-Verbose "Cmdlet Invoke-ChannelsBackup - Process"
+
+        $backupLoc = "$Location\channels"
+        Assert-Path $backupLoc
+
+        $channels = Get-Channel $Token | Select-Object -ExpandProperty channels
+        $channels | ConvertTo-Json -Depth 100 | Set-Content -Path "$backupLoc\channels.json"
+
+        $channels  | % {
+            $channelBackupPath = "$backupRoot\channels\$($_.id).json"
+            Invoke-ChannelBackup -Token $Token -ChannelId $_.id -Location $channelBackupPath
+        }
+    }
+}

Slack.Backup/Private/backup/Invoke-ChannelBackup.ps1

@@ -0,0 +1,36 @@
+function Invoke-FilesBackup {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true, Position = 0 )]
+        [string]$Token,
+        [Parameter(Mandatory = $true, Position = 1 )]
+        [string]$Location
+    )
+    process {
+        Write-Verbose "Cmdlet Invoke-FilesBackup - Process"
+
+        $backupLoc = "$Location/files"
+        Assert-Path $backupLoc
+
+        $start = Get-ChildItem -Path $backupLoc -Filter *.json |`
+            % { $_ | Get-Content -Encoding UTF8 | ConvertFrom-Json } |`
+            Select-Object -ExpandProperty created |`
+            Measure-Object -Maximum |`
+            Select-Object -ExpandProperty Maximum |`
+            % { $_ + 1 }
+
+        if (!$start) {
+            $start = Convert-DateToEpoch (Get-Date "2000-01-01")
+        }
+
+        $files = Get-FilesList -Token $key -TsFrom $start
+        if ($files.ok) {
+            foreach ($f in $files | Select-Object -ExpandProperty files) {
+                $ext = $f.filetype
+                $path = "$backupLoc/$($f.id)"
+                Get-SlackFile -Token $key -Uri $f.url_private | Set-Content "$path.$ext" -AsByteStream
+                $f | ConvertTo-Json -Depth 10 | Set-Content -Path "$path.json"
+            }
+        }
+    }
+}

Slack.Backup/Private/backup/Invoke-ChannelsBackup.ps1

@@ -0,0 +1,14 @@
+function Assert-Path {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true, Position = 0 )]
+        [string]$Path
+    )
+    process {
+        Write-Verbose "Cmdlet Assert-Path - Process"
+
+        if (!(Test-Path $Path -PathType Container)) {
+            New-Item -ItemType Directory -Force -Path $Path | Out-Null
+        }
+    }
+}

Slack.Backup/Private/backup/Invoke-FilesBackup.ps1

@@ -0,0 +1,31 @@
+function Invoke-BackupJob {
+    [CmdletBinding()]
+    param (
+        [Parameter(Mandatory = $true, Position = 0 )]
+        [string]$Token,
+        [Parameter(Mandatory = $false, Position = 1 )]
+        [string]$Location = ".\backup",
+        [Parameter(Mandatory = $false, Position = 2 )]
+        [switch]$Channels,
+        [Parameter(Mandatory = $false, Position = 3 )]
+        [switch]$Files
+    )
+
+    begin {
+        Write-Verbose "Cmdlet Invoke-BackupJob - Begin"
+    }
+
+    process {
+        Write-Verbose "Cmdlet Invoke-BackupJob - Process"
+        if ($Files) {
+            Invoke-FilesBackup -Token $Token -Location $Location
+        }
+        if ($Channels) {
+            Invoke-ChannelsBackup -Token $Token -Location $Location
+        }
+    }
+
+    end {
+        Write-Verbose "Cmdlet Invoke-BackupJob - End"
+    }
+}