Functions/GenXdev.Data.KeyValueStore/Sync-KeyValueStore.ps1
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############################################################################### <# .SYNOPSIS Synchronizes local and OneDrive key-value store databases. .DESCRIPTION Performs two-way synchronization between local and OneDrive shadow databases 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. .PARAMETER SessionOnly Use alternative settings stored in session for Data preferences like Language, Database paths, etc. .PARAMETER ClearSession Clear the session setting (Global variable) before retrieving. .PARAMETER SkipSession Dont use alternative settings stored in session for Data preferences like Language, Database paths, etc. .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, ############################################################################### [Parameter( Mandatory = $false, HelpMessage = ("Use alternative settings stored in session for Data " + "preferences like Language, Database paths, etc") )] [switch] $SessionOnly, ############################################################################### [Parameter( Mandatory = $false, HelpMessage = ("Clear the session setting (Global variable) " + "before retrieving") )] [switch] $ClearSession, ############################################################################### [Parameter( Mandatory = $false, HelpMessage = ("Dont use alternative settings stored in session " + "for Data preferences like Language, Database " + "paths, etc") )] [Alias("FromPreferences")] [switch] $SkipSession ############################################################################### ) begin { # check if custom database path was provided or use default location if ([string]::IsNullOrWhiteSpace($DatabasePath)) { # construct default database path in local app data folder $databaseFilePath = GenXdev.FileSystem\Expand-Path ` ("$($ENV:LOCALAPPDATA)\GenXdev.PowerShell\" + "KeyValueStores.sqllite.db") ` -CreateDirectory } else { # use the provided database path and ensure directory exists $databaseFilePath = GenXdev.FileSystem\Expand-Path $DatabasePath ` -CreateDirectory } # 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 } # assign local database path for clarity in sync operations $localDb = $databaseFilePath # construct path to onedrive shadow database for synchronization $shadowDb = GenXdev.FileSystem\Expand-Path ` ("~\OneDrive\GenXdev.PowerShell.SyncObjects\" + "KeyValueStores.sqllite.db") # log database paths for debugging and verification purposes Microsoft.PowerShell.Utility\Write-Verbose "Local DB: $localDb" Microsoft.PowerShell.Utility\Write-Verbose "Shadow DB: $shadowDb" # verify both database files exist before attempting synchronization if (-not ([System.IO.File]::Exists($localDb) -and [System.IO.File]::Exists($shadowDb))) { # inform user that missing database files are being initialized Microsoft.PowerShell.Utility\Write-Verbose ` "Initializing missing database files" # 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 databases if they don't exist GenXdev.Data\Initialize-KeyValueStores @params } # define sql query for bidirectional synchronization between databases $syncQuery = @" ATTACH DATABASE @shadowDb AS shadow; -- sync from shadow to local INSERT OR REPLACE INTO main.KeyValueStore SELECT * FROM shadow.KeyValueStore s WHERE s.synchronizationKey = @syncKey AND ( NOT EXISTS ( SELECT 1 FROM main.KeyValueStore m WHERE m.synchronizationKey = s.synchronizationKey AND m.storeName = s.storeName AND m.keyName = s.keyName AND m.lastModified >= s.lastModified ) ); -- sync from local to shadow INSERT OR REPLACE INTO shadow.KeyValueStore SELECT * FROM main.KeyValueStore m WHERE m.synchronizationKey = @syncKey AND ( NOT EXISTS ( SELECT 1 FROM shadow.KeyValueStore s WHERE s.synchronizationKey = m.synchronizationKey AND s.storeName = m.storeName AND s.keyName = m.keyName AND s.lastModified > m.lastModified ) ); "@ # create parameter hashtable for sql query parameter substitution $params = @{ 'shadowDb' = $shadowDb 'syncKey' = $SynchronizationKey } # log query execution for debugging and performance monitoring Microsoft.PowerShell.Utility\Write-Verbose ` "Executing sync query with parameters" # execute the synchronization query with prepared parameters GenXdev.Data\Invoke-SQLiteQuery ` -DatabaseFilePath $localDb ` -Queries $syncQuery ` -SqlParameters $params } end { # log completion of sync operation for audit and troubleshooting Microsoft.PowerShell.Utility\Write-Verbose "Sync operation completed" } } ############################################################################### |