Start of part2

Advent Of Code Day 11-part2.ps1

@@ -0,0 +1,170 @@
+Function Get-StringHash([String] $String,$HashName = "MD5")
+{
+    $StringBuilder = New-Object System.Text.StringBuilder
+    [System.Security.Cryptography.HashAlgorithm]::Create($HashName).ComputeHash([System.Text.Encoding]::UTF8.GetBytes($String))|%{
+    [Void]$StringBuilder.Append($_.ToString("x2"))
+}
+$StringBuilder.ToString()
+}
+function Get-OpenSeatCount {
+    param (
+        [int]$seatrow,
+        [int]$seatnum,
+        $seatmap
+    )
+   # write-host "$(Get-StringHash -String ($seatmap -join ''))"
+    $positionstocheck=@{
+    'UpperLeft'=@(($seatrow -1),($seatnum -1))
+    'UpperMiddle'=@(($seatrow -1),($seatnum))
+    'UpperRight'=@(($seatrow -1),($seatnum +1))
+    'Left'=@(($seatrow),($seatnum -1))
+    'Right'=@(($seatrow),($seatnum +1))
+    'LowerLeft'=@(($seatrow +1),($seatnum -1))
+    'LowerMiddle'=@(($seatrow +1),($seatnum))
+    'LowerRight'=@(($seatrow +1),($seatnum +1))
+    }
+    #write-host $positionstocheck
+    #write-host "SEATROW: $seatrow SEATNUM: $seatnum"
+    $adjacentseats=""
+    foreach($position in $positionstocheck.keys){
+        $thisrow, $thisseat = $positionstocheck[$position]
+        if($thisrow -eq -1){
+            continue
+        }
+        if($thisrow -gt $seatmap.count -1){
+            continue
+        }
+        if($thisseat -eq -1){
+            continue
+        }
+        if($thisseat -gt $seatmap[$seatrow].length -1){
+            continue
+        }
+        $myposition = $positionstocheck[$position]
+        $row = $myposition[0]
+        #write-host "$row"
+        $seat = $myposition[1]
+        #write-host "$seat"
+        #write-host $seatmap[$row]
+        $myrow = $seatmap[$row].ToCharArray()
+        $myseat = $myrow[$seat] 
+        $hadproblem=$false
+        do{
+            #write-host "ROW: $ROW SEAT: $SEAT"
+            if($myseat -ne '#'){
+                try{
+                    switch ($position){
+                        "UpperLeft" {
+                            $row = $row+1
+                            $seat = $seat-1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "UpperMiddle" {
+                            $row = $row+1
+                            #$seat = $seat+1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "UpperRight" {
+                            $row = $row+1
+                            $seat = $seat+1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "Left" {
+                            #$row = $row+1
+                            $seat = $seat-1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "Right" {
+                            #$row = $row+1
+                            $seat = $seat+1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "LowerLeft"{
+                            $row = $row-1
+                            $seat = $seat-1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "LowerMiddle"{
+                            $row = $row-1
+                            #$seat = $seat+1
+                            #write-host $row
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                        "LowerRight"{
+                            $row = $row-1
+                            $seat = $seat+1
+                            $myrow = $seatmap[$row].ToCharArray()
+                            $myseat = $myrow[$seat] 
+                        };
+                    }
+                } catch{
+                    write-host "Reached end"
+                    read-host "ISSUE?!"
+                    $hadproblem = $true
+                }
+            }
+        } while ( ($myseat -ne '#') -and ($hadproblem=$false))
+        $adjacentseats += $myrow[$seat]
+    }
+    #write-host "Adjacent Seats $adjacentseats"
+    return ($adjacentseats.tochararray()|?{$_ -eq '#'}).count
+}
+function proc-Seats(){
+    param(
+        $seatmap
+    )
+    $origmap = $seatmap.clone()
+
+    #$myseatmap= $seatmap.clone()
+    #$myseatmap=$seatmap
+    for($row=0;$row -lt $seatmap.count; $row++){
+        for($seatnum=0; $seatnum -lt ($seatmap[$row].ToCharArray().count); $seatnum++){
+            if($seatmap[$row][$seatnum] -ne '.'){
+                $occupiedseats = Get-OpenSeatCount -seatrow $row -seatnum $seatnum -seatmap $origmap
+                #write-host "Occupied Around $occupiedseats, SEATNUM $seatnum, SEATROW $row"
+                if( $occupiedseats -ge 5){
+                    #write-host $occupiedseats
+                    $myrow = $seatmap[$row].tochararray()
+                    $myrow[$seatnum]='L'
+                    $seatmap[$row]=$myrow -join ""
+                } elseif ($occupiedseats -eq 0) {
+                    #write-host $occupiedseats
+                    $myrow = $seatmap[$row].tochararray()
+                    $myrow[$seatnum]='#'
+                    $seatmap[$row]=$myrow -join ""
+                }
+            }
+        }
+    }
+    $seatmap
+}
+$seatmap = @(get-content .\aocd11input.txt)
+#$seatmap=@('L.LL.LL.LL','LLLLLLL.LL','L.L.L..L..','LLLL.LL.LL','L.LL.LL.LL','L.LLLLL.LL','..L.L.....','LLLLLLLLLL','L.LLLLLL.L','L.LLLLL.LL')
+$repeat=$false
+$loopnum=0
+$optionhashes = @()
+do{
+    $maphash =Get-StringHash -String ($seatmap -join '')
+    $loopnum++
+    write-host "Loop $loopnum"
+    write-host $maphash
+    $seatmap = @(proc-Seats -seatmap $seatmap)
+    $seatmap
+    if($optionhashes -contains $maphash ){
+        write-host "Repeat detected. Stopping"
+        $repeat=$true
+    } else { 
+        $optionhashes += $maphash
+    }
+    #read-host
+} while (
+    $repeat -eq $false
+)
+(($seatmap -join "").tochararray()|?{$_ -eq '#'}).count