From a9abcf0efbe9a42188d4005eca8ae4ffc50949ac Mon Sep 17 00:00:00 2001
From: Eduard Urbach <e.urbach@gmail.com>
Date: Mon, 29 Oct 2018 19:52:25 +0900
Subject: [PATCH] Show percentile for character rankings

---
 pages/character/ranking.go | 17 ++++++++++++++---
 scripts/AnimeNotifier.ts   |  9 ++++++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/pages/character/ranking.go b/pages/character/ranking.go
index f696c9ea..61bb2edb 100644
--- a/pages/character/ranking.go
+++ b/pages/character/ranking.go
@@ -2,7 +2,6 @@ package character
 
 import (
 	"net/http"
-	"strconv"
 
 	"github.com/aerogo/aero"
 	"github.com/animenotifier/arn"
@@ -18,11 +17,21 @@ func Ranking(ctx *aero.Context) string {
 		return ctx.Error(http.StatusNotFound, "Character not found", err)
 	}
 
+	// Create response object
+	response := struct {
+		Rank       int     `json:"rank"`
+		Percentile float64 `json:"percentile"`
+	}{}
+
 	// Sort characters
 	characters := arn.FilterCharacters(func(character *arn.Character) bool {
 		return !character.IsDraft
 	})
 
+	if len(characters) == 0 {
+		return ctx.JSON(response)
+	}
+
 	arn.SortCharactersByLikes(characters)
 
 	// Allow CORS
@@ -31,11 +40,13 @@ func Ranking(ctx *aero.Context) string {
 	// Return ranking
 	for index, character := range characters {
 		if character.ID == id {
-			return strconv.Itoa(index + 1)
+			response.Rank = index + 1
+			response.Percentile = float64(response.Rank) / float64(len(characters))
+			return ctx.JSON(response)
 		}
 	}
 
 	// If the ID wasn't found for some reason,
 	// return an empty string.
-	return ""
+	return ctx.JSON(response)
 }
diff --git a/scripts/AnimeNotifier.ts b/scripts/AnimeNotifier.ts
index da5071f1..81ce4edc 100644
--- a/scripts/AnimeNotifier.ts
+++ b/scripts/AnimeNotifier.ts
@@ -450,14 +450,17 @@ export default class AnimeNotifier {
 
 		for(let element of findAll("character-ranking")) {
 			fetch(`/api/character/${element.dataset.characterId}/ranking`).then(async response => {
-				let ranking = await response.text()
+				let ranking = await response.json()
 
-				if(ranking.length === 0) {
+				if(!ranking.rank) {
 					return
 				}
 
 				Diff.mutations.queue(() => {
-					element.textContent = "#" + ranking
+					let percentile = Math.ceil(ranking.percentile * 100)
+
+					element.textContent = "#" + ranking.rank.toString()
+					element.title = "Top " + percentile + "%"
 				})
 			})
 		}