community_patch.json

function calculateColor(violent, property) {
  // Return a color, redder meaning more crime, green meaning less crime
  var r = Math.round(255 * ((violent + property) / 2)); 
  var g = 255 - r;
  return [r, g, 0];
}

function behavior(state, context) {
  const { impact_crime } = context.globals();
  const HIGH_VIOLENT_CRIME_ADJ = 996 / impact_crime.violent_crime_adjuster; // In 2018, D.C. was the state with the highest violent crime rate (https://www.statista.com/statistics/200445/reported-violent-crime-rate-in-the-us-states/)
  const LOW_VIOLENT_CRIME_ADJ = 112 / impact_crime.violent_crime_adjuster; // In 2018, Maine was the state with the lowest violent crime rate (https://www.statista.com/statistics/200445/reported-violent-crime-rate-in-the-us-states/)
  const HIGH_PROPERTY_CRIME_ADJ = 4374 / impact_crime.property_crime_adjuster; // In 2018, D.C. was the state with the highest property crime rate (https://www.statista.com/statistics/232575/property-crime-rate-in-the-us-by-state/)
  const LOW_PROPERTY_CRIME_ADJ = 1249 / impact_crime.property_crime_adjuster; // In 2018, New Hampshire was the state with the lowest property crime rate (https://www.statista.com/statistics/232575/property-crime-rate-in-the-us-by-state/)
  let rgb = state.get("rgb");
  let violent_crime_adj = state.get("violent_crime_adj");
  let property_crime_adj = state.get("property_crime_adj");
  let name = state.get("name");
  // Adjust the crime rate if need be
  const adj_crime_rate_events = context.messages().filter(msg => msg.type === "adjust_crime_rate");
  adj_crime_rate_events.forEach(m => {
    if (m.data.excessive_force) {
      violent_crime_adj = violent_crime_adj * impact_crime.excessive_force;
      property_crime_adj = property_crime_adj * impact_crime.excessive_force;
    } else {
      violent_crime_adj = violent_crime_adj * impact_crime.general;
      property_crime_adj = property_crime_adj * impact_crime.general;
    }
  });
  // Adjust crime rates passively (time)
  violent_crime_adj = violent_crime_adj * impact_crime.time;
  property_crime_adj = property_crime_adj * impact_crime.time;
  // Make sure crime rates do not extreme
  if (violent_crime_adj > 1) {
    violent_crime_adj = 1;
  }
  if (property_crime_adj > 1) {
    property_crime_adj = 1;
  }
  rgb = calculateColor(violent_crime_adj * impact_crime.violent_crime_adjuster, property_crime_adj * impact_crime.property_crime_adjuster);
  state.set("rgb", rgb);
  state.set("violent_crime_adj", violent_crime_adj);
  state.set("property_crime_adj", property_crime_adj);
  return state;
}