From 0dd65dd062362f913b3028e07e2f0c3afaec8894 Mon Sep 17 00:00:00 2001
From: Vidhu Kant Sharma <vidhukant@protonmail.ch>
Date: Mon, 31 Jan 2022 11:25:04 +0530
Subject: Added a URL Generator

---
 anime/anime.go | 12 +++++++++---
 anime/util.go  | 40 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 49 insertions(+), 3 deletions(-)

(limited to 'anime')

diff --git a/anime/anime.go b/anime/anime.go
index 7e5cf70..2c23209 100644
--- a/anime/anime.go
+++ b/anime/anime.go
@@ -2,8 +2,9 @@ package anime
 
 import (
 	"encoding/json"
+	"errors"
 	"fmt"
-  "errors"
+	"strconv"
 )
 
 // Each anime has its own ID on MAL
@@ -18,13 +19,18 @@ func GetAnimeById(token string, animeId int) Anime {
 }
 
 // Ranking is a list of anime sorted by their rank
-func GetAnimeRanking(token string, rankingType string) (AnimeRanking, error) {
+func GetAnimeRanking(token string, rankingType string, limit int) (AnimeRanking, error) {
   var animeRanking AnimeRanking
   if !isValidRankingType(rankingType) {
     return animeRanking, errors.New(fmt.Sprintf("GetAnimeRanking: Invalid Ranking Type Given (\"%s\")", rankingType))
   }
 
-  endpoint := "https://api.myanimelist.net/v2/anime/ranking?ranking_type=all&limit=4"
+  endpoint, _ := urlGenerator(
+    "https://api.myanimelist.net/v2/anime/ranking",
+    []string{"ranking_type", "limit"},
+    [][]string{{rankingType}, {strconv.Itoa(limit)}},
+    true,
+  )
 
   // gets data from API and stores it in a struct
   var rankingData RawRanking
diff --git a/anime/util.go b/anime/util.go
index 319bbc9..f09f189 100644
--- a/anime/util.go
+++ b/anime/util.go
@@ -4,8 +4,11 @@ import (
 	"io/ioutil"
 	"log"
 	"net/http"
+  "errors"
 )
 
+// Handles HTTP request with your OAuth token as a Header
+// TODO: Verify that this function is safe to use
 func requestHandler(token string, endpoint string) string {
   client := &http.Client{}
 
@@ -31,3 +34,40 @@ func requestHandler(token string, endpoint string) string {
 
   return string(body)
 }
+
+func urlGenerator(baseUrl string, names []string, values [][]string, isPrimary bool) (string, error) {
+  // TODO: error if cap(names) != cap(values)
+  if cap(names) != cap(values) {
+    return "", errors.New("urlGenerator: Error: Length of names and values don't match.")
+  }
+
+  var fields string
+
+  for index, name := range(names) {
+    var data string
+    /* if the data is the first field in URL, 
+     * it goes like ?key=value
+     * else it is &nextkey=value */
+    if isPrimary {
+      data = "?" + name + "="
+    } else { 
+      data = "&" + name + "="
+    }
+
+    // add values to data variable
+    for i, j := range values[index] {
+      if i > 0 {
+        data = data + "," + j
+      } else {
+        data = data + j 
+      }
+    }
+
+    fields = fields + data
+
+    // from now on all other fields will be secondary
+    isPrimary = false
+  }
+
+  return baseUrl + fields, nil
+}
-- 
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