Leaderboard leagues

[GODrums]

Objectives

Leaderboards should provide progression across weeks. To achieve this, we want to introduce a league-based system, which offers progression in down- and upranking across the different leagues.
Examples league-system (LoL, Faceit):

Basic system dynamics:

• every user gets a default amount of league points assigned (e.g. 1000)
• league points cannot be reset
• points ranges are separated into actual "ranks" with distinguishable names and icons:
  • Bronze: 0-1250
  • Silver: 1250-1500
  • Gold: 1500-1750
  • Platinum: 1750-2000
  • Diamond: 2000+
• leaderboards affect the league points:
  • Used formula is:
    
  • s: leaderboard score, r: leaderboard ranking, p: player's league points
  • Description: The change in rating is equivalent to a weighted sum of the player's leaderboard score plus a placement bonus minus a point decay based on the player's current points.

Tasks

• Decide on basic league system dynamics
• Design simple league icons: Figma Project
  • Create simple placeholders first
  • Design real icons in Figma
  • Store and make them accessible in Angular
• Prepare application-server for leagues:
  • Make task scheduling more modular: Refactor: Modularization of Task Scheduling #194
  • Create LeaguePointsCalculationService: League Points Calculation + Task Scheduling #195
  • Create new task for calculating the leaderboard results: League Points Calculation + Task Scheduling #195
• Integrate into leaderboard + profile UI: League UI for Leaderboard and Profile Pages #210
  • Add league icons as first "column" in leaderboard
  • Display league icon + progress on user profiles:
    
  • Show predicted gain / loss (maybe only in dashboard?)
  • Current league overview (personalized) above leaderboard
  • League page with all users & their league (points)