powershell - Loop and join 2 functions to move files in folders by category & rename by original title -

for matching category filename use code

 gci *.pdf | foreach { (iwr "https://arxiv.org/abs/$($_.basename)")`  -match 'primary-subject">(.*?)</span>'; $matches[1] } 

to have idea mean http://i.imgur.com/57kjjr6.png

to rename indipendently: can use not useful because process folder folder , take long time (number of folders high number)

#all pdfs | rename { query arxiv abstract filename, use page title + ".pdf"}      get-childitem *.pdf | rename-item -newname {          $title = (invoke-webrequest "https://arxiv.org/abs/$($_.basename)").parsedhtml.title         $title = $title -replace '[\\/:\*\?"<>\|]', '-'  # replace forbidden characters         "$title.pdf"                                     # in filenames -     } 

i should make folders (without [folder])

[folder] information theory (cs.it) [folder] number theory (math.nt) .... 

i try join 2 operations:

moving subject

[folder] geometric topology (cs.it)         |         |__ [file] 1611.00066         |__ [file] .....  [folder] number theory (math.nt)     |     |__ [file] 1611.00057 

and renaming title

[folder] geometric topology (cs.it)         |         |__ [file] 1611.00066         |__ [file] .....  [folder] number theory (math.nt)         |         |__ [file] 1611.00057 

for loop , join operation make .ps1 file. insert code don't work

$res=invoke-webrequest "https://arxiv.org/abs/$($_.basename"    $rootpath="c:\temp"     function clean-invalidfilenamechars {       param(         [parameter(mandatory=$true,           position=0,           valuefrompipeline=$true,           valuefrompipelinebypropertyname=$true)]         [string]$name       )        $invalidchars = [io.path]::getinvalidfilenamechars() -join ''       $re = "[{0}]" -f [regex]::escape($invalidchars)       $res=($name -replace $re)       return $res.substring(0, [math]::min(260, $res.length))     }      function clean-invalidpathchars {       param(         [parameter(mandatory=$true,           position=0,           valuefrompipeline=$true,           valuefrompipelinebypropertyname=$true)]         [string]$name       )        $invalidchars = [io.path]::getinvalidpathchars() -join ''       $re = "[{0}]" -f [regex]::escape($invalidchars)       $res=($name -replace $re)       return $res.substring(0, [math]::min(248, $res.length))     }      gci *.pdf | foreach { (iwr "https://arxiv.org/abs/$($_.basename)")`      -match 'primary-subject">(.*?)</span>'; $matches[1] }       #get date , cut format template, group subject , clean title , subject transformation dir , file name     $grousubject=$res.parsedhtml.body.outertext | convertfrom-string -templatecontent $template | select  @{n="subject";e={clean-invalidpathchars $_.subject}}, @{n="title";e={clean-invalidfilenamechars $_.title}} | group subject       #create dir , files     $grousubject | %{$path= "$rootpath\$($_.name)" ; $_.group.title | %{new-item -itemtype file -path "$path\$_" -force}   }     get-childitem *.pdf | rename-item -newname {              $title = (invoke-webrequest "https://arxiv.org/abs/$($_.basename)").parsedhtml.title             $title = $title -replace '[\\/:\*\?"<>\|]', '-'  # replace forbidden characters             "$title.pdf"                                     # in filenames -         } 

my powershell version 4

edit: esmeraldo solution works http://i.imgur.com/neio868.png

thank you

function clean-invalidfilenamechars {   param(     [parameter(mandatory=$true,       position=0,       valuefrompipeline=$true,       valuefrompipelinebypropertyname=$true)]     [string]$name   )    $invalidchars = [io.path]::getinvalidfilenamechars() -join ''   $re = "[{0}]" -f [regex]::escape($invalidchars)   $res=($name -replace $re)   return $res.substring(0, [math]::min(260, $res.length)) }  function clean-invalidpathchars {   param(     [parameter(mandatory=$true,       position=0,       valuefrompipeline=$true,       valuefrompipelinebypropertyname=$true)]     [string]$name   )    $invalidchars = [io.path]::getinvalidpathchars() -join ''   $re = "[{0}]" -f [regex]::escape($invalidchars)   $res=($name -replace $re)   return $res.substring(0, [math]::min(248, $res.length)) }   $rootpath="c:\temp2"  $rootpathresult="c:\tempresult"  $template=@' [3]  arxiv:1611.00057 [pdf, ps, other]  title: {title*:holomorphy of adjoint $l$ functions quasisplit a2}  authors: joseph hundley  comments: 18 pages  subjects: {subject:number theory (math.nt)}  [4]  arxiv:1611.00066 [pdf, other]  title: {title*:many haken heegaard splittings}  authors: alessandro sisto  comments: 12 pages, 3 figures  subjects: {subject:geometric topology (math.gt)}  [5]  arxiv:1611.00067 [pdf, ps, other]  title: {title*:subsumed homoclinic connections , infinitely many coexisting attractors in piecewise-linear maps}  authors: david j.w. simpson, christopher p. tuffley  subjects: {subject:dynamical systems (math.ds)}  [21]  arxiv:1611.00114 [pdf, ps, other]  title: {title*:faces of highest weight modules , universal weyl polyhedron}  authors: gurbir dhillon, apoorva khare  comments: recall preliminaries , results companion paper arxiv:1606.09640  subjects: {subject:representation theory (math.rt)}; combinatorics (math.co); metric geometry (math.mg) '@  #extract utils data , clean  $listbook=gci $rootpath -file -filter *.pdf | foreach { new-object psobject -property @{file=$_.fullname; books= ((iwr "https://arxiv.org/abs/$($_.basename)").parsedhtml.body.outertext | convertfrom-string -templatecontent $template)}} | select file -expandproperty books |  select file,  @{n="subject";e={clean-invalidpathchars $_.subject}}, @{n="title";e={clean-invalidfilenamechars $_.title}}      #build dirs , copy+rename file $listbook | %{$newpath="$rootpathresult\$($_.subject)"; new-item -itemtype directory -path "$newpath" -force;  copy-item $_.file "$newpath\$($_.title).pdf" -force}