public/Update-MarkdownImages.ps1
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<#
.SYNOPSIS Updates markdown content by replacing local image references with Google Drive URLs. .DESCRIPTION Takes a markdown file and replaces local image references with Google Drive public URLs, converting all images to standard markdown format while preserving alt text and titles. .PARAMETER File The path to the markdown file to update. .PARAMETER OutFile Optional. If specified, writes the updated markdown content to this file instead of overwriting the original file. .PARAMETER ImageMappings An array of objects containing the mapping between original markdown and new URLs. Each object should have OriginalMarkdown and NewUrl properties. .EXAMPLE $mappings = @( @{ OriginalMarkdown = ""; NewUrl = "https://drive.google.com/uc?export=view&id=123"; AltText = "alt"; Title = "" } @{ OriginalMarkdown = "![[image.png|description]]"; NewUrl = "https://drive.google.com/uc?export=view&id=456"; AltText = "description"; Title = "" } ) Update-MarkdownImages -File "post.md" -ImageMappings $mappings .EXAMPLE $mappings = Find-MarkdownImages -File "post.md" $mappings[0].NewUrl = "https://drive.google.com/uc?export=view&id=123" Update-MarkdownImages -File "post.md" -ImageMappings $mappings -OutFile "updated-post.md" #> function Update-MarkdownImages { [CmdletBinding()] param( [Parameter(Mandatory = $true)] [ValidateScript({ Test-Path -Path $_ -PathType Leaf })] [string]$File, [Parameter(Mandatory = $true)] [AllowEmptyCollection()] [array]$ImageMappings, [Parameter()] [string]$OutFile ) $TargetFile = $File Write-Verbose "UpdateMarkdownImages: Processing file $TargetFile with $($ImageMappings.Count) image mappings" $content = Get-Content -Path $TargetFile -Raw $originalContent = $content foreach ($mapping in $ImageMappings) { $originalMarkdown = $mapping.OriginalMarkdown $newUrl = $mapping.NewUrl $altText = $mapping.AltText $title = $mapping.Title # Construct the new markdown image syntax if ($title) { $newMarkdown = "![$altText]($newUrl `"$title`")" } else { $newMarkdown = "" } # Replace the original markdown with the new one $content = $content -replace [regex]::Escape($originalMarkdown), $newMarkdown } # If OutFile is specified, write the updated content to that file if ($OutFile) { Write-Verbose "UpdateMarkdownImages: Changing output file from $File to $OutFile" $TargetFile = $OutFile } # Only write the file if content has changed or if OutFile is specified if ($content -ne $originalContent -or $OutFile) { Set-Content -Path $TargetFile -Value $content -NoNewline Write-Verbose "Updated markdown file: $TargetFile" return ($content -ne $originalContent) } else { Write-Verbose "No changes made to markdown file: $File" return $false } } |