Trying to grab league statistics in order to compute win rates for inhouse games - http

Question

I have been trying to use the riot games api to compute all the previous custom games and then find the win loss streaks for individual players, I have built the following code to grab matches for a particular user.
See https://github.com/FriendlyUser/deno-riot-games-custom-games
But I feel like the riot games api is only returning data with its v4 api up to season 11, if anyone could clarify how the api works or explain how I could possibly get more data, that would be fantastic.
import { writeJson } from "https://deno.land/std/fs/mod.ts"
import "https://deno.land/x/dotenv/load.ts"
const player_id = Deno.env.get('ACCOUNT_ID')
const region_url = 'https://na1.api.riotgames.com'
let riot_URL = new URL(`${region_url}/lol/match/v4/matchlists/by-account/${player_id}`)
enum HTTP {
GET = 'GET',
POST = 'POST',
PUT = 'PUT',
DELETE = 'DELETE'
}
interface MatchlistDto {
startIndex: number
totalGames: number
endIndex: number
matches: Array<any>
}
function makeFetchOptions(
riotKey = Deno.env.get('RIOT_API_KEY'),
method: HTTP = HTTP.GET
): object {
return {
method: method,
headers: {
"Accept-Charset": "application/x-www-form-urlencoded; charset=UTF-8",
"Accept-Language": "en-US,en;q=0.9",
'X-Riot-Token': riotKey
}
}
}
function appendMatchHistory(riot_endpoint: string): Promise<MatchlistDto> {
const riotKey = Deno.env.get('RIOT_API_KEY')
console.log(riotKey)
const options = makeFetchOptions(riotKey)
return fetch(riot_endpoint, options)
.then( (resp: any) => {
console.log(resp)
return resp.json()
})
.then( (matchData: MatchlistDto) => {
return matchData
})
}
const max_iterations = 1000
let bIndex = 0
let eIndex = 100
let current_url = riot_URL
let riot_endpoint = null
let allMatches = []
let customGames = []
const sleep = (milliseconds: number) => {
return new Promise(resolve => setTimeout(resolve, milliseconds))
}
for (let i = 0; i < max_iterations; i++) {
console.log(`beginIndex: ${bIndex} endIndex: ${eIndex}`)
riot_endpoint = current_url.toString()
const newMatches = await appendMatchHistory(riot_endpoint)
await sleep(1500)
current_url.searchParams.delete('beginIndex')
current_url.searchParams.delete('endIndex')
const {matches} = newMatches
if (matches.length == 0) {
console.log(`ENDING SCRIPT AT ${eIndex} with ${matches.length}`)
break
}
// startIndex becomes endIndex
bIndex = eIndex
eIndex = eIndex + 100
allMatches.push(newMatches.matches)
// get new url
current_url.searchParams.append('beginIndex', String(bIndex))
current_url.searchParams.append('endIndex', String(eIndex))
}
await writeJson(
"./allData.json",
allMatches
);

Answer 1

Sorry if this answer is late. But yes the Riot API is only for "current" data, and that is why sites like U.GG, OP.GG, etc actually run scripts to store data continuously. So to get statistics you would have to write scripts to store it into your own DB over time.
Sadly, there is no way to get previous season data