// Japanese Knotweed pop-up content for location id/name
// If the value in the "Loc_ID" field is empty, then the value "No value" will appear in the pop-up.  
// Otherwise, the value in the "Loc_ID" field will appear.

return DefaultValue($feature.Loc_ID, "No value");

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// Display the length of the trail in miles using a math equation to convert feet to miles.  
// This can save you from maintaining multiple fields related to length or areal units.

// length of trail in feet using the native "Shape_Length" field
var length_feet = $feature["Shape_Length"];

// length of trail in miles
// use a simple math equation
var length_miles = length_feet / 5280;

// round length in miles to 2 decimal places
// this helps make the displayed values more presentable to the general public
var rounded_length_miles = Round(length_miles, 2);

// use "return" keyword to set value in pop-up
return rounded_length_miles;

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// Setting the display value for a Vehicle Crash based upon a numeric code.
// crash data file contains numeric codes. an associated pdf file maps the codes to textual descriptions

// Collision Type field
var code = $feature.COLLISION_TYPE;

// set text value based upon code value
// first argument is the field or variable you want to run the decode operation on
// last argument is a default value to return if no matches are found in dataset
var decodedValue = Decode(code, 0, 'Non-collision', 1, 'Rear-end', 2, 'Head-on', 3, 'Backing', 4, 'Angle', 5, 'Sideswipe (same dir.)', 6, 'Sideswipe (Opposite dir.)', 7, 'Hit fixed object', 8, 'Hit pedestrian', 9, 'Other or Unknown', 'Not specified');

// return value for popup
return decodedValue;

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// Create a label expression for a Roads Centerline layer where the road name components are in multiple fields.  
// The component fields will be combined into a single value to display.  
// Additionally, we will make sure that the value is not empty.  
// If it is empty, we will display an empty string ('').
// If it's not empty, we'll display the value in the field.

// the road pre-directional (i.e, "North", "South")
var road_prefix = IIf(IsEmpty($feature["LSt_PreDir"]), '', $feature["LSt_PreDir"]);

// the road name (i.e., "Main", "Market")
var road_name = IIf(IsEmpty($feature["LSt_Name"]), '', $feature["LSt_Name"]);

// the road type (i.e., "Street", "Lane")
var road_suffix = IIf(IsEmpty($feature["LSt_Type"]), '', $feature["LSt_Type"]);

// the road post-directional (i.e, "West", "East")
var road_postdir = IIf(IsEmpty($feature["LSt_PosDir"]), '', $feature["LSt_PosDir"]);

// combined the seperate name components into a single variable
// there will be a space (' ') between each component
// Examples include "W Main Street", "Market Street", "Apple Lane South"
var road_label = Concatenate([road_prefix, road_name, road_suffix, road_postdir], ' ');

// it's good practice to use the "return" keyword
return road_label;

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// perform an intersect spatial analysis between a hiking trails layer and PA house districts layer
// display the PA house district(s) that intersect the trail in the trail's popup
// if no house district(s) intersect trail, display a default message in popup

// pa house districts layer in web map
var pa_house_districts = FeatureSetById($map, /* PA House Districts */ "legislativedistrictshouse_4815");

// result of intersect function
// returns pa house district feature[s] that intersects hiking trail
var intersect_analysis = Intersects($feature, pa_house_districts);

// count of features from intersect analysis
var count_result = Count(intersect_analysis);

// if there are intersecting pa house district features process results
if (count_result > 0) {
    // container variable for each set of results
    var result_text = '';
    
    // loop through all results of intersect analysis
    // reference fields from pa house district layer
    for (var feature in intersect_analysis) {
        var first_name = feature.H_FIRSTNAME;
        var last_name = feature.H_LASTNAME;
        var district = feature.LEG_DISTRICT_NO;
        var party = feature.PARTY;
        
        // group text and append to result variable
        result_text += first_name + ' ' + last_name + ' ; District: ' + district + ' ; Party: ' + party + TextFormatting.NewLine;
    }
  // if no house districts intersect trail, display message
} else {
    return 'No Pennsylvania State House district intersects this trail feature';
}

return result_text;