Config file containing all the build configurations according to the supported environment

Config.kt

object Config {
    
    object Flavor {
        const val PROD = "prod"
        const val STAGING = "staging"
    }
    
    const val HOST_URL = "HOST_URL"
    const val SOME_KEY = "SOME_KEY"
    // Supported flavors
    val defaultFlavors = listOf(Flavor.PROD, Flavor.STAGING)
    
    val keyList = listOf(
        HOST_URL,
        SOME_KEY
    )
    // Map of flavors with their respective configurations
    val variantFieldMap = mapOf(
        FLAOUR_STAGING to getStagingFields(),
        FLAVOR_PROD to getProdFields()
    )
    
    object Staging {
      const val host_url = "https://staging.api.com"
      const val some_key = "staging_key"
      // other configs can go here
    }
    
    object Prod {
      const val host_url = "https://prod.api.com"
      const val some_key = "prod_key"
      // other configs can go here
    }
    
    private fun getStagingFields(): Map<String, String> {
        val fields = mutableMapOf<String, String>()
        fields[HOST_URL] = Staging.host_url
        fields[SOME_KEY] = Staging.some_key
        return fields
    }
    
    private fun getProdFields(): Map<String, String> {
        val fields = mutableMapOf<String, String>()
        fields[HOST_URL] = Prod.host_url
        fields[SOME_KEY] = Prod.some_key
        return fields
    }
}