implement municipal election results

streets.ps1

@@ -1,8 +1,15 @@
-$partyMapping = @{
-    ARD   = 'Blue'
-    ZDF   = 'Orange'
-    'C&A' = 'Red'
-}
+[CmdletBinding()]
+param (
+    [string]
+    $DataSource = './Gesamtergebnis-Gemeinderatswahl-2019_stripped.csv'
+)
+
+
+$data = Import-Csv $DataSource
+
+$greenParty = ($data[0].PSObject.Properties.Name -like '*Grüne*')[0]
+
+$partyMapping = $data | Where-Object Description -eq 'Color'
 
 # nested array instead of hashtable, because hashtable keys are case-insensitive
 $replacementList = @(
@@ -16,13 +23,53 @@ $replacementList = @(
     ,('Elstarweg ','Elstarweg')
 )
 
-$featureList = Import-Csv ./data.csv
+$featureList = Import-Csv ./polling_stations.csv
 | Sort-Object -Unique Strassenname
-| Group-Object {$_.Wahllokal1,$_.Wahllokal2,$_.Wahllokal3 -join ' '}
+| Group-Object Concat
 | ForEach-Object {
     $pollingStation = $_
 
-    $party = ('ARD','ZDF','C&A' | Get-Random)
+    $electionResultObject = $data | Where-Object Description -eq $pollingStation.Name
+    if ($electionResultObject) {
+        # form into an array for easier handling and to preserve sorting
+        $electionResultArray = $electionResultObject.PSObject.Properties | ForEach-Object {
+            if ($_.Name -ne 'Description') {
+                [pscustomobject]@{
+                    Party = $_.Name
+                    ResultValue = [decimal](($_.Value -eq '-' ? 0 : $_.Value) -replace '%$')
+                    Formatted = $_.Value
+                }
+            }
+        } | Sort-Object -Descending ResultValue
+
+        Write-Host $pollingStation.Name
+        $electionResultString = ($electionResultArray | ForEach-Object {
+            $_.Formatted + "`t" + $_.Party
+        }) -join "`n"
+
+        $greenResult = ($electionResultArray | Where-Object Party -eq $greenParty).ResultValue
+
+        $opacity = ($greenResult - 20) / 5 * 0.6 + 0.4
+        $opacity = $opacity -gt 1.0 ? 1.0 : $opacity
+        $opacity = $opacity -lt 0.4 ? 0.4 : $opacity
+
+        $weight = ($greenResult - 20) / 5 * 10 + 5
+        $weight = $weight -gt 15 ? 15 : $weight
+        $weight = $weight -lt  5 ?  5 : $weight
+
+        $party = $electionResultArray[0].Party
+    } else {
+        $electionResultString = 'no data available'
+        $opacity = 0.5
+        $party = $null
+    }
+
+    $umapOptiones = [PSCustomObject]@{
+        #color = ($using:partyMapping).$party
+        color = $partyMapping.$party ?? '#ff00ff'
+        weight = $weight
+        opacity = $opacity
+    }
 
     $pollingStation.Group | ForEach-Object {
         $street = $_.Strassenname
@@ -30,7 +77,11 @@ $featureList = Import-Csv ./data.csv
             $street = $street.Replace($replacement[0], $replacement[1])
         }
 
-        $query = '
+        $description  = $street
+        $description += "`n`n"
+        $description += $electionResultString
+
+        $query = @'
 <osm-script>
   <query into="_" type="area">
     <has-kv k="name" modv="" v="Öhringen"/>
@@ -44,7 +95,8 @@ $featureList = Import-Csv ./data.csv
     <recurse type="way-node"/>
   </union>
   <print e="" from="_" geometry="skeleton" ids="yes" limit="" mode="body" n="" order="id" s="" w=""/>
-</osm-script>' -f $street
+</osm-script>
+'@ -f $street
 
         $overpassSplat = @{
             Method = 'Post'
@@ -70,13 +122,9 @@ $featureList = Import-Csv ./data.csv
             [PSCustomObject]@{
                 type = 'Feature'
                 properties = [PSCustomObject]@{
-                    _umap_options = [PSCustomObject]@{
-                        #color = ($using:partyMapping).$party
-                        color = $partyMapping.$party
-                        weight = 10
-                    }
+                    _umap_options = $umapOptiones
                     name = $pollingStation.Name
-                    description = $street
+                    description = $description
                 }
                 geometry = [PSCustomObject]@{
                     type = 'LineString'