PoE Ninja data

[AyronK]

• Fetch data from PoE Ninja once upon a time (e.g. every 15 minutes).
• Fetch all data and store in some sort of cached dictionary.
• Display chaos equivalent and confidence
• Expose currency exchange method like Convert(10, 'chaos', 'exa')
• Expose method like GetPrice(string name) and for now return null if there is more then one match
• Do not throw exception when api is down (just return empty things and handle not rendering)

Deserialize just important properties.

https://poe.ninja/api/data/itemoverview?league=Metamorph&type=UniqueArmour
https://poe.ninja/api/data/currencyoverview?league=Metamorph&type=Currency

  { 'overview': 'currency', 'type': 'Currency' },
  { 'overview': 'currency', 'type': 'Fragment' },
  { 'overview': 'item', 'type': 'Watchstone' },
  { 'overview': 'item', 'type': 'Oil' },
  { 'overview': 'item', 'type': 'Incubator' },
  { 'overview': 'item', 'type': 'Scarab' },
  { 'overview': 'item', 'type': 'Fossil' },
  { 'overview': 'item', 'type': 'Resonator' },
  { 'overview': 'item', 'type': 'Essence' },
  { 'overview': 'item', 'type': 'DivinationCard' },
  { 'overview': 'item', 'type': 'Prophecy' },
  { 'overview': 'item', 'type': 'SkillGem' },
  { 'overview': 'item', 'type': 'Base'type'' },
  { 'overview': 'item', 'type': 'HelmetEnchant' },
  { 'overview': 'item', 'type': 'UniqueMap' },
  { 'overview': 'item', 'type': 'Map' },
  { 'overview': 'item', 'type': 'UniqueJewel' },
  { 'overview': 'item', 'type': 'UniqueFlask' },
  { 'overview': 'item', 'type': 'UniqueWeapon' },
  { 'overview': 'item', 'type': 'UniqueArmour' },
  { 'overview': 'item', 'type': 'UniqueAccessory' },
  { 'overview': 'item', 'type': 'Beast' }

 {
            "currencyTypeName": "Mirror of Kalandra",
            "pay": {
                "id": 0,
                "league_id": 74,
                "pay_currency_id": 22,
                "get_currency_id": 1,
                "sample_time_utc": "2020-01-13T05:36:47.9770861Z",
                "count": 49,
                "value": 0.0000441969661538461538461539,
                "data_point_count": 1,
                "includes_secondary": true // means it is followed by 'k' like 22.0k
            },
            "receive": {
                "id": 0,
                "league_id": 74,
                "pay_currency_id": 1,
                "get_currency_id": 22,
                "sample_time_utc": "2020-01-13T05:36:47.9770861Z",
                "count": 75,
                "value": 22015,
                "data_point_count": 1,
                "includes_secondary": true
            },
            "paySparkLine": {
                "data": [
                    0,
                    0,
                    0,
                    0,
                    0,
                    0,
                    13.13
                ],
                "totalChange": 13.13
            },
            "receiveSparkLine": {
                "data": [
                    0,
                    -3.35,
                    2.73,
                    11.65,
                    6.54,
                    7.95,
                    11.34
                ],
                "totalChange": 11.34
            },
            "chaosEquivalent": 22320.49,
            "lowConfidencePaySparkLine": {
                "data": [
                    0,
                    0,
                    0,
                    0,
                    0,
                    0,
                    13.13
                ],
                "totalChange": 13.13
            },
            "lowConfidenceReceiveSparkLine": {
                "data": [
                    0,
                    -3.35,
                    2.73,
                    11.65,
                    6.54,
                    7.95,
                    11.34
                ],
                "totalChange": 11.34
            },
            "detailsId": "mirror-of-kalandra"
        }