Functions/GenXdev.Data.KeyValueStore/Sync-KeyValueStore.ps1
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############################################################################### <# .SYNOPSIS Synchronizes local and OneDrive key-value store JSON files. .DESCRIPTION Performs two-way synchronization between local and OneDrive shadow JSON files using a last-modified timestamp strategy. Records are merged based on their last modification time, with newer versions taking precedence. .PARAMETER SynchronizationKey Identifies the synchronization scope for the operation. Using "Local" will skip synchronization as it indicates local-only records. .PARAMETER DatabasePath Database path for key-value store data files. .EXAMPLE Sync-KeyValueStore .EXAMPLE Sync-KeyValueStore -SynchronizationKey "UserSettings" #> function Sync-KeyValueStore { [CmdletBinding()] param( ############################################################################### [Parameter( Mandatory = $false, Position = 0, HelpMessage = 'Key to identify synchronization scope' )] [string] $SynchronizationKey = 'Local', ############################################################################### [Parameter( Mandatory = $false, HelpMessage = 'Database path for key-value store data files' )] [string] $DatabasePath ############################################################################### ) begin { # check if custom base path was provided or use default location if ([string]::IsNullOrWhiteSpace($DatabasePath)) { # construct default base path in local app data folder $basePath = "$($ENV:LOCALAPPDATA)\GenXdev.PowerShell\KeyValueStore" } else { # use the provided base path $basePath = $DatabasePath } # construct path to onedrive shadow directory for synchronization $shadowPath = GenXdev.FileSystem\Expand-Path ` "~\OneDrive\GenXdev.PowerShell.SyncObjects\KeyValueStore" # log the beginning of sync operation for troubleshooting Microsoft.PowerShell.Utility\Write-Verbose ` "Starting key-value store sync with key: $SynchronizationKey" } process { # skip synchronization for local-only records to avoid unnecessary work if ($SynchronizationKey -eq 'Local') { # inform user that local-only sync is being skipped Microsoft.PowerShell.Utility\Write-Verbose ` 'Skipping sync for local-only key' return } # log store directory paths for debugging and verification purposes Microsoft.PowerShell.Utility\Write-Verbose "Local path: $basePath" Microsoft.PowerShell.Utility\Write-Verbose "Shadow path: $shadowPath" # verify both directories exist before attempting synchronization if (-not ([System.IO.Directory]::Exists($basePath) -and [System.IO.Directory]::Exists($shadowPath))) { # inform user that missing directories are being initialized Microsoft.PowerShell.Utility\Write-Verbose ` 'Initializing missing store directories' # copy compatible parameters for the initialization function call $params = GenXdev.Helpers\Copy-IdenticalParamValues ` -BoundParameters $PSBoundParameters ` -FunctionName 'GenXdev.Data\Initialize-KeyValueStores' ` -DefaultValues (Microsoft.PowerShell.Utility\Get-Variable ` -Scope Local ` -ErrorAction SilentlyContinue) # initialize the key-value store directories if they don't exist GenXdev.Data\Initialize-KeyValueStores @params } # get all JSON files from both directories matching the sync key pattern $safeSyncKey = $SynchronizationKey -replace '[\\/:*?"<>|]', '_' $filePattern = "${safeSyncKey}_*.json" Microsoft.PowerShell.Utility\Write-Verbose ` "Syncing files matching pattern: $filePattern" # collect all matching store files from both locations $localFiles = @{} $shadowFiles = @{} foreach ($file in (Microsoft.PowerShell.Management\Get-ChildItem ` -LiteralPath $basePath ` -Filter $filePattern ` -File ` -ErrorAction SilentlyContinue)) { $localFiles[$file.Name] = $file.FullName } foreach ($file in (Microsoft.PowerShell.Management\Get-ChildItem ` -LiteralPath $shadowPath ` -Filter $filePattern ` -File ` -ErrorAction SilentlyContinue)) { $shadowFiles[$file.Name] = $file.FullName } # get union of all filenames $allFilenames = $localFiles.Keys + $shadowFiles.Keys | ` Microsoft.PowerShell.Utility\Select-Object -Unique # sync each store file foreach ($filename in $allFilenames) { Microsoft.PowerShell.Utility\Write-Verbose ` "Syncing store file: $filename" $localFilePath = [System.IO.Path]::Combine($basePath, $filename) $shadowFilePath = [System.IO.Path]::Combine($shadowPath, $filename) # read both store versions $localData = GenXdev.FileSystem\ReadJsonWithRetry -FilePath $localFilePath $shadowData = GenXdev.FileSystem\ReadJsonWithRetry -FilePath $shadowFilePath # merge stores based on last modified timestamps $mergedData = @{} # add all local keys foreach ($key in $localData.Keys) { $mergedData[$key] = $localData[$key] } # merge shadow keys, keeping newer versions foreach ($key in $shadowData.Keys) { $shadowEntry = $shadowData[$key] if ($mergedData.ContainsKey($key)) { $localEntry = $mergedData[$key] # compare timestamps if both have metadata if ($localEntry -is [hashtable] -and $shadowEntry -is [hashtable] -and $localEntry.ContainsKey('lastModified') -and $shadowEntry.ContainsKey('lastModified')) { $localTime = [DateTime]::Parse($localEntry['lastModified']) $shadowTime = [DateTime]::Parse($shadowEntry['lastModified']) # keep newer version if ($shadowTime -gt $localTime) { $mergedData[$key] = $shadowEntry } } else { # no metadata, keep shadow version $mergedData[$key] = $shadowEntry } } else { # key only exists in shadow, add it $mergedData[$key] = $shadowEntry } } # write merged data to both locations GenXdev.FileSystem\WriteJsonAtomic -FilePath $localFilePath -Data $mergedData GenXdev.FileSystem\WriteJsonAtomic -FilePath $shadowFilePath -Data $mergedData } } end { # log completion of sync operation for audit and troubleshooting Microsoft.PowerShell.Utility\Write-Verbose 'Sync operation completed' } } |