topfreegames/khan

// khan
// https://github.com/topfreegames/khan
//
// Licensed under the MIT license:
// http://www.opensource.org/licenses/mit-license
// Copyright © 2016 Top Free Games <backend@tfgco.com>

package util

import "sort"

func getIntLevel(level interface{}) int {
    switch level.(type) {
    case float64:
        return int(level.(float64))
    default:
        return level.(int)
    }
}

// SortLevels sorts levels
func SortLevels(levels map[string]interface{}) LevelsList {
    ll := make(LevelsList, len(levels))
    i := 0
    for k, v := range levels {
        ll[i] = Level{k, getIntLevel(v)}
        i++
    }
    sort.Sort(ll)
    return ll
}

// Level maps levels
type Level struct {
    Key   string
    Value int
}

// LevelsList allows sorting levels by the int value
type LevelsList []Level

func (l LevelsList) Len() int           { return len(l) }
func (l LevelsList) Less(i, j int) bool { return l[i].Value < l[j].Value }
func (l LevelsList) Swap(i, j int)      { l[i], l[j] = l[j], l[i] }