How do I Decode this JSON in Swift 4 - json

Question

I have this JSON response that i need decoded but i only need certain properties from it. I want to grab the Legend's name and the amount of kills they have on the legend. How do i struct by Legend Model in order to get the decoder to work properly?
`
"legends": {
"selected": {
"LegendName": "Pathfinder",
"data": [
{
"name": "Season 5 Kills",
"value": 757,
"key": "kills_season_5"
},
{
"name": "Kills",
"value": 1140,
"key": "kills"
}
],
"ImgAssets": {
"icon": "https:\/\/api.mozambiquehe.re\/assets\/icons\/pathfinder.png",
"banner": "https:\/\/api.mozambiquehe.re\/assets\/banners\/pathfinder.jpg"
}
},
"all": {
"Pathfinder": {
"data": [
{
"name": "Kills",
"value": 1140,
"key": "kills"
},
{
"name": "Damage",
"value": 257532,
"key": "damage"
},
{
"name": "Season 5 Kills",
"value": 757,
"key": "kills_season_5"
}
],
"ImgAssets": {
"icon": "https:\/\/api.mozambiquehe.re\/assets\/icons\/pathfinder.png",
"banner": "https:\/\/api.mozambiquehe.re\/assets\/banners\/pathfinder.jpg"
}
},
"Wraith": {
"data": [
{
"name": "Kills",
"value": 269,
"key": "kills"
},
{
"name": "Season 5 Wins",
"value": 7,
"key": "wins_season_5"
},
{
"name": "Season 5 Kills",
"value": 174,
"key": "kills_season_5"
}
],
"ImgAssets": {
"icon": "https:\/\/api.mozambiquehe.re\/assets\/icons\/wraith.png",
"banner": "https:\/\/api.mozambiquehe.re\/assets\/banners\/wraith.jpg"
}
},
"Octane": {
"data": [
{
"name": "Season 5 Kills",
"value": 106,
"key": "kills_season_5"
}
],
"ImgAssets": {
"icon": "https:\/\/api.mozambiquehe.re\/assets\/icons\/octane.png",
"banner": "https:\/\/api.mozambiquehe.re\/assets\/banners\/octane.jpg"
}
},
"Wattson": {
"ImgAssets": {
"icon": "https:\/\/api.mozambiquehe.re\/assets\/icons\/wattson.png",
"banner": "https:\/\/api.mozambiquehe.re\/assets\/banners\/wattson.jpg"
}
}
}
},
}
Above is the JSON response and i want the decoder to simply just display the legends and the kills and damage they have inside their data array. I am currently having trouble accessing the "Data" array under each legend.

Answer 1

You can use Codable to get the expected response. Use the below models,
struct Response: Codable {
let legends: Legends
}
struct Legends: Codable {
let all: [String:Legend]
}
struct Legend: Codable {
let data: [LegendData]?
var kills: Int {
return self.data?.filter({$0.key.lowercased() == "kills"}).first?.value ?? 0
}
var damage: Int {
return self.data?.filter({$0.key.lowercased() == "damage"}).first?.value ?? 0
}
}
struct LegendData: Codable {
let value: Int
let key: String
}
Since you only need the count of kills and damage for each Legend, there is no need to parse everything in the JSON.
In the Legend model, I've created 2 computed properties kills and damage. These properties will directly return the count of kills and damage for each legend without having to write that much code everytime you access it.
Now parse the JSON data like so,
do {
let response = try JSONDecoder().decode(Response.self, from: data)
response.legends.all.forEach { (name,legend) in
let kills = legend.kills
let damage = legend.damage
print("\(name) - Kills: \(kills), Damage: \(damage)")
}
} catch {
print(error)
}
Example Output:
Pathfinder - Kills: 1140, Damage: 257532
Octane - Kills: 0, Damage: 0
Wattson - Kills: 0, Damage: 0
Wraith - Kills: 269, Damage: 0