fishstats.js

const fishCount = ~~customData.get(`fish_count`)
let caught = customData.get(`fish`) ?? []

if (!Array.isArray(caught))
	switch (typeof caught) {
		case `string`:
			const
				fishes = Uint16Array.of(1, 15, 21, 22, 23, 34, 41, 1406, 1443),
				emojis = []
			for (let emoji of caught.trim())
				if (fishes.includes((emoji = emoji.codePointAt(0)) - 128010))
					emojis.push(emoji)
			caught = emojis
			break
		case `object`:
			try {
				caught = new Uint32Array(caught)
					.filter(emoji => fishes.includes(emoji - 128010))
			}
			catch {
				caught = []
			}
			break
		default:
			caught = [].concat(caught)
	}


let stats = ``
new function () {
	this[`types caught`] = caught.reduce((emojis, emoji, idx) => {
		if (emoji && caught.indexOf(emoji) === idx)
			emojis += String.fromCodePoint(emoji)

		return emojis
	}, ``)
	if (fishCount) {
		this[`longest recorded fish`] = (+customData.get(`fish_len`) % 1443 || undefined)?.toString().concat(`cm`)

		const
			unlucky = +customData.get(`fish_unlucky`) || undefined,
			unluckyRecord = +customData.get(`fish_unlucky_record`) || undefined

		this[`attempts since last catch`] = unlucky?.toString().concat(`x`)
		if (unlucky !== unluckyRecord)
			this[`longest unlucky streak`] = unluckyRecord?.toString().concat(`x`)
	}
	this[`total fish invocations`] = (+customData.get(`fish_total`) || undefined)?.toString().concat(`x`)

	for (const key in this)
		if (this[key])
			stats += ` \u{2022} ${key}: ${this[key]}`
};

`You've caught a total of ${fishCount} fish${fishCount === 1 ? `` : `es`}` + stats