From 7f033b93588740549c2031592abc9fc3aa2db558 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?David=20Majdand=C5=BEi=C4=87?=
 <david.majdandzic@hotmail.com>
Date: Wed, 12 Jun 2024 18:35:10 +0200
Subject: [PATCH] Add coloring

---
 src/lib/components/Food/EmptyFoodComp.svelte | 11 ++---
 src/lib/components/Food/FoodComp.svelte      |  8 +++-
 src/lib/components/Food/FoodTable.svelte     | 37 ++++++++++++++-
 src/lib/database/food.ts                     | 14 ++++--
 src/lib/utils.ts                             | 49 ++++++++++++++++++++
 5 files changed, 103 insertions(+), 16 deletions(-)

diff --git a/src/lib/components/Food/EmptyFoodComp.svelte b/src/lib/components/Food/EmptyFoodComp.svelte
index 71e567a..e3540b1 100644
--- a/src/lib/components/Food/EmptyFoodComp.svelte
+++ b/src/lib/components/Food/EmptyFoodComp.svelte
@@ -30,24 +30,19 @@
 			item.food = name
 			item.amount = parseInt(amount)
 			item.description = description
-			const [dbFood, err]: [Food[], Err] = await FoodService.Create(item)
+			const [dbFood, err]: [Food, Err] = await FoodService.Create(item)
 			name = ''
 			amount = ''
 			description = ''
 			per100 = ''
 			per100Edited = false
 
-			if (dbFood.length == 0) {
-				toast.error('Creating food returned 0 rows')
-				return
-			}
 			if (err) {
 				toast.error(err)
 				return
 			}
 			foodStore.update((food) => {
-				// @ts-ignore
-				food.unshift(dbFood[0])
+				food.unshift(dbFood)
 				return food
 			})
 		}
@@ -64,7 +59,7 @@
 </script>
 
 <template>
-	<tr class="border-b border-gray-200 dark:border-gray-700">
+	<tr class="border-b border-gray-200 dark:border-gray-700 text-lg font-bold">
 		<th class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap bg-gray-50 dark:text-white dark:bg-gray-800"
 		    scope="row">
 		</th>
diff --git a/src/lib/components/Food/FoodComp.svelte b/src/lib/components/Food/FoodComp.svelte
index deab869..f96b809 100644
--- a/src/lib/components/Food/FoodComp.svelte
+++ b/src/lib/components/Food/FoodComp.svelte
@@ -2,6 +2,9 @@
 	import { type Food, FoodService } from '$lib/database/food'
 
 	export let item: Food
+	export let energyColor: string
+	export let nameColor: string
+
 	let amount: string = item.amount.toString()
 	let per100: string = item.per100?.toString() ?? ''
 	let description: string = item.description ?? ''
@@ -34,12 +37,13 @@
 </script>
 
 <template>
-	<tr class="border-b border-gray-200 dark:border-gray-700">
+	<tr class="border-b border-gray-200 dark:border-gray-700 font-bold text-lg">
 		<th class="px-6 py-4 font-medium text-gray-900 whitespace-nowrap bg-gray-50 dark:text-white dark:bg-gray-800"
 		    scope="row">
 			{item.date}
 		</th>
 		<td class="px-6 py-4"
+		    style="color: {nameColor}"
 		    contenteditable="true"
 		    bind:innerText={name}
 		    on:keydown={update}>
@@ -59,7 +63,7 @@
 		    bind:innerText={per100}
 		    on:keydown={update}>
 		</td>
-		<td class="px-6 py-4">
+		<td class="px-6 py-4" style="color: {energyColor}">
 			{item.energy}
 		</td>
 	</tr>
diff --git a/src/lib/components/Food/FoodTable.svelte b/src/lib/components/Food/FoodTable.svelte
index 1c5c463..57da199 100644
--- a/src/lib/components/Food/FoodTable.svelte
+++ b/src/lib/components/Food/FoodTable.svelte
@@ -2,8 +2,43 @@
 	import EmptyFoodComp from '$components/Food/EmptyFoodComp.svelte'
 	import FoodComp from '$components/Food/FoodComp.svelte'
 	import type { Food } from '$lib/database/food'
+	import { GenerateColor } from '$lib/utils'
 
 	export let items: Food[] = []
+
+	let minCal = 1e5
+	let maxCal = 0
+	for (let item of items) {
+		if (!item.energy) continue
+		if (item.energy > maxCal) maxCal = item.energy
+		if (item.energy < minCal) minCal = item.energy
+	}
+
+	const start = '#99ff99'
+	const end = '#ff9999'
+
+	function lerp(item: Food) {
+		if (!item) return start
+		if (!item.energy) return start
+		const t = (item.energy - minCal) / (maxCal - minCal)
+		const r = parseInt(start.slice(1, 3), 16) * (1 - t) + parseInt(end.slice(1, 3), 16) * t
+		const g = parseInt(start.slice(3, 5), 16) * (1 - t) + parseInt(end.slice(3, 5), 16) * t
+		const b = parseInt(start.slice(5, 7), 16) * (1 - t) + parseInt(end.slice(5, 7), 16) * t
+		return `rgb(${r}, ${g}, ${b})`
+	}
+
+	const itemColors: Map<string, string> = new Map<string, string>()
+
+	function getNameColor(item: Food): string {
+		if (!item) return GenerateColor()
+		if (!item.food) return GenerateColor()
+		if (!itemColors.has(item.food)) itemColors.set(item.food, GenerateColor())
+		// THERE'S NOTHING UNDEFINED HERE
+		// WE GOT RID OF UNDEFINED ON LINE 33
+		// ASSHOLE
+		// @ts-ignore
+		return itemColors.get(item.food)
+	}
 </script>
 
 <template>
@@ -35,7 +70,7 @@
 				<tbody>
 				<EmptyFoodComp />
 				{#each items as f}
-					<FoodComp item="{f}" />
+					<FoodComp item="{f}" energyColor="{lerp(f)}" nameColor="{getNameColor(f)}" />
 				{/each}
 				</tbody>
 			</table>
diff --git a/src/lib/database/food.ts b/src/lib/database/food.ts
index edd0774..d3a3b7d 100644
--- a/src/lib/database/food.ts
+++ b/src/lib/database/food.ts
@@ -38,14 +38,18 @@ or strftime('%Y-%m-%d', date) = strftime('%Y-%m-%d', date('2024-06-12', '-1 day'
 order by date DESC;
 `, [date])
 	},
-	async Create(food: Food): Promise<[Food[], Err]> {
-		if (!food.food) return [[food], 'food.food is required']
-		if (!food.amount) throw [[food], 'food.amount is required']
+	async Create(food: Food): Promise<[Food, Err]> {
+		if (!food.food) return [food, 'food.food is required']
+		if (!food.amount) throw [food, 'food.amount is required']
 
 		const res = await db.execute(`insert into food (food, description, amount) values ($1, $2, $3)`, [food.food, food.description, food.amount])
-		const row = await db.select<Food[]>(`select ${columns.join(', ')} from foodView where rowid = $1`, [res.lastInsertId])
+		const rows = await db.select<Food[]>(`select ${columns.join(', ')} from foodView where rowid = $1`, [res.lastInsertId])
 
-		return [row, null]
+		if (!rows) return [food, 'no data found']
+		if (rows.length == 0) return [food, 'no data found']
+		// Its not undefined mannnnnnnnnnnnnnnnnnnnnnnnnn............
+		// @ts-ignore
+		return [rows[0], null]
 	},
 	async GetLatestPer100(food: string): Promise<[number, Err]> {
 		if (!food) return [-1, 'food is required']
diff --git a/src/lib/utils.ts b/src/lib/utils.ts
index 2299e58..efdc6af 100644
--- a/src/lib/utils.ts
+++ b/src/lib/utils.ts
@@ -60,3 +60,52 @@ export const flyAndScale = (
 		easing: cubicOut
 	}
 }
+
+type Color = {
+	h: number
+	s: number
+	l: number
+}
+
+function ColorDistance(color1: Color, color2: Color) {
+	return Math.abs(color1.h - color2.h)
+}
+
+function GenerateRandomHSL(): Color {
+	const hue = Math.floor(Math.random() * 360)
+	const saturation = 70
+	const lightness = 60
+	return { h: hue, s: saturation, l: lightness }
+}
+
+const existingColors: Color[] = []
+
+function GenerateColor(): string {
+	const minDistance = 200
+
+	let newColor: Color
+	let isDistinct = false
+	let iterations = 0
+	while (!isDistinct) {
+		iterations++
+		if (iterations > 100) {
+			console.error('Failed to generate a distinct color after 100 iterations')
+			break
+		}
+		newColor = GenerateRandomHSL()
+		isDistinct = true
+
+		for (const color of existingColors) {
+			if (ColorDistance(newColor, color) < minDistance) {
+				isDistinct = false
+				break
+			}
+		}
+	}
+
+	// We can not reach this point without having a color generated
+	// @ts-ignore
+	return `hsl(${newColor.h}, ${newColor.s}%, ${newColor.l}%)`
+}
+
+export { GenerateColor }