[Quest] How power line is attached on this support?

app/src/main/java/de/westnordost/streetcomplete/quests/QuestsModule.kt

@@ -124,6 +124,7 @@ import de.westnordost.streetcomplete.quests.police_type.AddPoliceType
 import de.westnordost.streetcomplete.quests.postbox_collection_times.AddPostboxCollectionTimes
 import de.westnordost.streetcomplete.quests.postbox_ref.AddPostboxRef
 import de.westnordost.streetcomplete.quests.postbox_royal_cypher.AddPostboxRoyalCypher
+import de.westnordost.streetcomplete.quests.power_attachment.AddPowerAttachment
 import de.westnordost.streetcomplete.quests.powerpoles_material.AddPowerPolesMaterial
 import de.westnordost.streetcomplete.quests.railway_crossing.AddRailwayCrossingBarrier
 import de.westnordost.streetcomplete.quests.recycling.AddRecyclingType
@@ -293,7 +294,8 @@ fun questTypeRegistry(
 
     26 to AddReligionToPlaceOfWorship(), // icons on maps are different - OSM Carto, mapy.cz, OsmAnd, Sputnik etc
     27 to AddReligionToWaysideShrine(),
-
+
+    164 to AddPowerAttachment()
     28 to AddPowerPolesMaterial(),
 
     29 to AddIsBuildingUnderground(), // should be before AddHousenumber to avoid asking for underground buildings

app/src/main/java/de/westnordost/streetcomplete/quests/power_attachment/AddPowerAttachment.kt

@@ -0,0 +1,42 @@
+package de.westnordost.streetcomplete.quests.power_attachment
+
+import de.westnordost.streetcomplete.R
+import de.westnordost.streetcomplete.data.osm.geometry.ElementGeometry
+import de.westnordost.streetcomplete.data.osm.mapdata.Element
+import de.westnordost.streetcomplete.data.osm.mapdata.MapDataWithGeometry
+import de.westnordost.streetcomplete.data.osm.mapdata.filter
+import de.westnordost.streetcomplete.data.osm.osmquests.OsmFilterQuestType
+import de.westnordost.streetcomplete.data.user.achievements.EditTypeAchievement.BUILDING
+import de.westnordost.streetcomplete.osm.Tags
+
+class AddPowerAttachment : OsmFilterQuestType<PowerAttachment>() {
+
+    override val elementFilter = """
+        nodes with
+          power ~ tower|pole|insulator
+          and !line_attachment
+    """
+    override val changesetComment = "Specify line_attachment power support"
+    override val wikiLink = "Key:line_attachment"
+    override val icon = R.drawable.ic_quest_power
+    override val achievements = listOf(BUILDING)
+
+    override fun getTitle(tags: Map<String, String>) = R.string.quest_powerAttachment_title
+
+    override fun getHighlightedElements(element: Element, getMapData: () -> MapDataWithGeometry): Sequence<Element> {
+        val mapData = getMapData()
+        // and also show the (power) lines themselves
+        return mapData.filter("nodes with power ~ tower|pole|insulator") +
+            mapData.filter("ways with power ~ line|minor_line")
+    }
+
+    // map data density is usually lower where there are power poles and more context is necessary
+    // when looking at them from afar
+    override val highlightedElementsRadius get() = 100.0
+
+    override fun createForm() = AddPowerAttachmentForm()
+
+    override fun applyAnswerTo(answer: PowerAttachment, tags: Tags, geometry: ElementGeometry, timestampEdited: Long) {
+        tags["line_attachment"] = answer.osmValue
+    }
+}

app/src/main/java/de/westnordost/streetcomplete/quests/power_attachment/AddPowerAttachmentForm.kt

@@ -0,0 +1,13 @@
+package de.westnordost.streetcomplete.quests.power_attachment
+
+import de.westnordost.streetcomplete.quests.AImageListQuestForm
+
+class AddPowerAttachmentForm : AImageListQuestForm<PowerAttachment, PowerAttachment>() {
+
+    override val items = PowerAttachment.values().map { it.asItem() }
+    override val itemsPerRow = 3
+
+    override fun onClickOk(selectedItems: List<PowerAttachment>) {
+        applyAnswer(selectedItems.single())
+    }
+}

app/src/main/java/de/westnordost/streetcomplete/quests/power_attachment/PowerAttachment.kt

@@ -0,0 +1,7 @@
+package de.westnordost.streetcomplete.quests.power_attachment
+
+enum class PowerAttachment(val osmValue: String) {
+    SUSPENSION("suspension"),
+    ANCHOR("anchor"),
+    PIN("pin"),
+}

app/src/main/java/de/westnordost/streetcomplete/quests/power_attachment/PowerAttachmentItem.kt

@@ -0,0 +1,21 @@
+package de.westnordost.streetcomplete.quests.power_attachment
+
+import de.westnordost.streetcomplete.R
+import de.westnordost.streetcomplete.quests.powerpoles_material.PowerAttachment.SUSPENSION
+import de.westnordost.streetcomplete.quests.powerpoles_material.PowerAttachment.ANCHOR
+import de.westnordost.streetcomplete.quests.powerpoles_material.PowerAttachment.PIN
+import de.westnordost.streetcomplete.view.image_select.Item
+
+fun PowerAttachment.asItem() = Item(this, iconResId, titleResId)
+
+private val PowerAttachment.titleResId: Int get() = when (this) {
+    SUSPENSION -> R.string.quest_powerAttachment_suspension
+    ANCHOR -> R.string.quest_powerAttachment_anchor
+    PIN -> R.string.quest_powerAttachment_pin
+}
+
+private val PowerAttachment.iconResId: Int get() = when (this) {
+    SUSPENSION -> R.drawable.power_attachment_suspension
+    ANCHOR -> R.drawable.power_attachment_anchor
+    PIN -> R.drawable.power_attachment_pin
+}

app/src/main/res/values/strings.xml

@@ -1313,6 +1313,11 @@ If there are no signs along the whole street which apply for the highlighted sec
     <string name="quest_postboxRoyalCypher_title">What’s the royal cypher on this postbox?</string>
     <string name="quest_postboxRoyalCypher_type_none">No royal cypher is visible</string>
     <string name="quest_postboxRoyalCypher_type_scottish_crown">The Crown of Scotland</string>
+
+    <string name="quest_powerAttachment_title">How is this power line attached?</string>
+    <string name="quest_powerAttachment_suspension">Suspension</string>
+    <string name="quest_powerAttachment_anchor">Anchor</string>
+    <string name="quest_powerAttachment_pin">Pin</string>
 
     <!-- I.e. which material. Pole as in "power pole" or "utility pole" -->
     <string name="quest_powerPolesMaterial_title">What’s this pole made of?</string>