Update-Lbi.psm1
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# mazzy@mazzy.ru, 2017-09-24 # https://github.com/mazzy-ax/Update-Lbi # # Copyright (c) 2017 Sergey Mazurkin # # Licensed under the Apache License, Version 2.0 (the "License"); # you may not use this file except in compliance with the License. # You may obtain a copy of the License at # # http://www.apache.org/licenses/LICENSE-2.0 # # Unless required by applicable law or agreed to in writing, software # distributed under the License is distributed on an "AS IS" BASIS, # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. # See the License for the specific language governing permissions and # limitations under the License. #requires -version 3.0 <# .SYNOPSIS This module updates Dreamweaver library items (LBI) within html-files. .DESCRIPTION The module splits each Html file into fragments: raw html fragments and library items (LibItem). Then the module update content for all LibItem relative a lbi-file. Finally the module merge all fragments and save it to html-file. A HtmlFragment contains a raw html. It never updated. A LibItem contains a special html fragment: * started with a html-comment <!-- #BeginLibraryItem "LibraryDir\FileName.lbi" --> * and ended with a html-comment <!-- #EndLibraryItem --> .LINKS https://helpx.adobe.com/dreamweaver/using/library-items.html #> Class HtmlFragment { [String]$Value HtmlFragment ( [String]$Value ) { $this.Value = $Value } [HtmlFragment]Update([String]$BaseDir) { return $this } [String]Text([String]$Indent = '') { # It ignores $Indent. See derived classes. return $this.Value } [String]LastLineIndent([String]$PreviousIndent = '') { if ( $this.Value -match '(?<indent>\n\s*)(?:.*)$' ) { return $Matches['indent'] } return $PreviousIndent } } Class LibItem : HtmlFragment { [String]$FileName [String]$Begin [String]$End Static [Hashtable] $Cache = @{} LibItem ( [String]$Value, [String]$FileName, [String]$Begin = "<!-- #BeginLibraryItem `"$FileName`" -->", [String]$End = "<!-- #EndLibraryItem -->" ) : base($Value) { $this.FileName = $FileName $this.Begin = $Begin $this.End = $End } [HtmlFragment]Update([String]$BaseDir) { $File = Join-Path -Path $BaseDir -ChildPath $this.FileName if ( $File -in $this::Cache.Keys ) { Write-Verbose "Read from the cache. Key='$File'" return $this::Cache[$File] } if ( Test-Path $File ) { Write-Verbose "Read from the file '$File'" $Text = Get-Content -LiteralPath $File -Encoding UTF8 -Raw $Parts = $Text -split '<meta.*?charset=utf-8.*?>' $this.Value = -join $Parts Write-Verbose "Lbi from file '$this.FileName' in the directory '$BaseDir'." Write-Verbose "set cache: key='$file'" $this::Cache[$File] = $this } else { # TODO ?add to cache to avoid redundant Test-Path? Write-Warning "Lbi '$this.FileName' is not found in the directory '$BaseDir'. Inner text is not changed." } return $this } [String]Text([String]$Indent = '') { $Text = ([HtmlFragment]$this).Text($Indent) # TODO to Cache or not to Cache? if ( $Indent -and ($Indent -ne '\n') ) { $Text = $Text -replace '\n', $Indent } return -join ($this.Begin, $Text, $this.End) } [String]LastLineIndent([String]$PreviousIndent = '') { # A LibItem never changes the indent. See HtmlFragment return $PreviousIndent } } <# .SYNOPSIS Gets an fragments from an HtmlText. .DESCRIPTION It splits an HTMLText into fragments and returns all fragments. .PARAMETER HtmlText Whole html text. .EXAMPLE Get-Content example.html -raw | Get-LibItem #> function Get-LibItem { [CmdletBinding()] [OutputType([HtmlFragment])] Param ( [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [String]$HtmlText ) process { $HtmlText -split '(<!-- #BeginLibraryItem ".*?" -->[\s\S]*?<!-- #EndLibraryItem -->)' | ForEach-Object { if ( $_ -match '^(?<Begin><!-- #BeginLibraryItem "(?<filename>.*?)" -->)(?<Value>[\s\S]*?)(?<End><!-- #EndLibraryItem -->)$' ) { [LibItem]::New($Matches['Value'], $Matches['filename'], $Matches['Begin'], $Matches['End']) } elseif ( $_ ) { [HtmlFragment]::New($_) } } } } <# .SYNOPSIS Updates fragments .PARAMETER BaseDir Base directory for library files. The default location is the current directory. .PARAMETER Fragment [HtmlFragment] or derived [LibItems] objects #> function Update-LibItem { [CmdletBinding()] Param ( [Parameter(Position = 0, ValueFromPipelineByPropertyName = $true)] [String]$BaseDir = (Get-Location), [Parameter(Position = 1, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [HtmlFragment]$Fragment ) process { $Fragment.Update($BaseDir) } } <# .SYNOPSIS Merge all fragments. It indents LibItems by a last line in previous html fragment. .PARAMETER Fragments [HtmlFragment] and [LibItem] #> function Merge-LibItem { [CmdletBinding()] [OutputType([String])] Param ( [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [HtmlFragment[]]$Fragments ) begin { $Html = [System.Text.StringBuilder]::new() $IdentStr = '' } process { foreach ($Fragment in $Fragments) { [void]$Html.Append($Fragment.Text($IdentStr)) $IdentStr = $Fragment.LastLineIndent($IdentStr) } } end { $Html.ToString() } } <# .SYNOPSIS Update all LibItems in one html file. .PARAMETER FileName An html file name. .PARAMETER BaseDir Base directory for library files. The default location is the current directory. .PARAMETER Force Forces the set-content to set the contents of a file, even if the file is read-only. .LINKS set-content #> function Update-LibItems { [cmdletbinding()] param( [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true)] [String[]]$FileName, [Parameter(ValueFromPipelineByPropertyName = $true)] [String]$BaseDir = (Get-Location), [switch]$Force ) process { $FileName | ForEach-Object { if ( Test-Path $_ ) { Write-Output "BaseDir='$BaseDir'. Upate LBI in file '$_'" $Html = Get-Content -LiteralPath $_ -Encoding UTF8 -Raw | Get-LibItem | Update-LibItem -BaseDir $BaseDir | Merge-LibItem $Html | Out-File -FilePath $_ -Encoding UTF8 -NoNewline -Force:$Force } else { Write-Error "File '$_' not found." } } } } <# .SYNOPSIS Update lbi in several html files. .DESCRIPTION The cmdlet provide useful features: * default values to easy updates all html file from site root directory * maintain wildcards * show progress bar (TODO) * parallel updates - each html file in separate thread (TODO) .PARAMETER Path Specifies a path to the site root. Wildcards are permitted. The default path is all files in the current directory. .PARAMETER Include Gets only the specified items. The value of this parameter qualifies the -Path parameter. Enter a path element or pattern, such as "*.html". Wildcards are permitted. The default value is "*.html", "*.htm" .PARAMETER Exclude Omits the specified items. The value of this parameter qualifies the -Path parameter. Wildcards are permitted. .PARAMETER BaseDir Base directory for library files. The default location is the current directory. .PARAMETER Recurse Gets the files in the specified path and in all child directory. .PARAMETER Force Forces the set-content to set the contents of a file, even if the file is read-only. .LINKS set-content #> function Update-LibItemsCli { [cmdletbinding()] param( [Parameter(ValueFromPipeline = $true, Position = 0)] [String[]]$Path = (Join-Path (Get-Location) "*"), [String[]]$Include = @("*.html", "*.htm"), [String[]]$Exclude, [String]$BaseDir = (Split-Path $Path -Parent), [switch]$Recurse, [switch]$Force ) process { Write-Verbose "Update Dreamveawer library items (Lbi) in files." Write-Verbose "Path=$Path" Write-Verbose "Include=$Include" Write-Verbose "Exclude=$Exclude" Write-Verbose "Recurse=$Recurse" # TODO is it more effective with a parallel updating? # see native 'foreach -parallel' and # https://github.com/RamblingCookieMonster/Invoke-Parallel # https://github.com/powercode/PSParallel # TODO add progress bar # https://github.com/mazzy-ax/Write-ProgressEx Get-ChildItem $Path -Include $Include -Exclude $Exclude -Recurse:$Recurse | Update-LibItems -BaseDir $BaseDir } } Export-ModuleMember ` -Cmdlet Get-LibItem, Update-LibItem, Merge-LibItem, Update-LibItems, Update-LibItemsCli ` -Function Get-LibItem, Update-LibItem, Merge-LibItem, Update-LibItems, Update-LibItemsCli |