sendou.ink/app/features/build-stats/queries/averageAbilityPoints.server.ts

import { sql } from "~/db/sql";
import type { Ability, MainWeaponId } from "~/modules/in-game-lists/types";

// TODO: could consider removing private builds from this
const query = (includeWeaponId: boolean) => /* sql */ `
  select "BuildAbility"."ability", sum("BuildAbility"."abilityPoints") as "abilityPointsSum"
    from "BuildAbility"
    left join "BuildWeapon" on "BuildAbility"."buildId" = "BuildWeapon"."buildId"
  ${
		includeWeaponId
			? /* sql */ `where "BuildWeapon"."weaponSplId" = @weaponSplId`
			: ""
	}
  group by "BuildAbility"."ability"
`;

const findByWeaponIdStm = sql.prepare(query(true));
const findAllStm = sql.prepare(query(false));

export interface AverageAbilityPointsResult {
	ability: Ability;
	abilityPointsSum: number;
}

export function averageAbilityPoints(weaponSplId?: MainWeaponId | null) {
	const stm = typeof weaponSplId === "number" ? findByWeaponIdStm : findAllStm;

	return stm.all({
		weaponSplId: weaponSplId ?? null,
	}) as Array<AverageAbilityPointsResult>;
}