feat(wifi_basic): plugin added

[daadu]

Related to #187

[daadu]

@DominikStarke Can you review this file? esp. handling of isEnabled (lifted code from SO!) - tested with iOS - iOS 15 simlulator (returns true), and iOS 12 device (it is working), will soon test on iOS 15 too - will let you know.

[daadu]

Looks like it always returns true in iOS 15.

So may be wont go ahead with this unofficial API.

@DominikStarke Do you have any views on what best-case API to call if iOS does not allow it? Currently in wifi_iot - it checks if currentSSID != null - other forums suggest using SCNetworkReachability (as used by connectivity_plus plugin).

Both suggest that the mobile is "connected" to a WifiNetwork and not if the hw/service is "enabled" - but looks like this is the best we can achieve. My views are we should use SCNetworkReachability as it does not require any additional permission from user. Le me know your view.

[fernando-s97]

I took a look at the flutter code of this PR and I have some proposals:

a) wifi_basic.dart

1. Split the wifi_basic.dart file into multiple ones for better organization.

In case of WiFiInfo, that needs the private _fromMap, we could make use of the part and part of keywords.

2. Make WiFiInfo a proper data class, implementing at least == and hashCode.

3. Probably cast every property of WiFiInfo._fromMap to its expected type (for clarity).

4. Probably make WiFiInfo.toString also show its name. Ex.: "WiFiInfo(...properties...)".

5. WiFiBasic._channel name should be prefixed by the plugin domain, as recommended per flutter.

6. invokeMethod casts

Maybe, instead of _channel.invokeMethod("getGeneration") as int?, _channel.invokeMethod<int?>("getGeneration") should be preferred, since it's already part of the method.

7. Make WiFiBasic.getCurrentInfo return null if _channel.invokeMapMethod return null

b) extensions.dart

Changing the current code to the below one would make much more clear which values are mapped to which enum

extension WiFiGenerationsExtension on WiFiGenerations {
  static WiFiGenerations fromInt(int? value) {
    switch (value) {
      case 0:
      case 1:
      case 2:
      case 3:
        return WiFiGenerations.legacy;
      case 4:
        return WiFiGenerations.wifi4;
      case 5:
        return WiFiGenerations.wifi5;
      case 6:
        return WiFiGenerations.wifi6;
      default:
        return WiFiGenerations.unknown;
    }
  }
}

extension WiFiNetworkSecurityExtension on WiFiNetworkSecurity {
  static WiFiNetworkSecurity fromInt(int? value) {
    switch (value) {
      case 0:
        return WiFiNetworkSecurity.unknown;
      case 1:
        return WiFiNetworkSecurity.none;
      case 2:
        return WiFiNetworkSecurity.wep;
      case 3:
        return WiFiNetworkSecurity.wpa;
      case 4:
        return WiFiNetworkSecurity.wpa2;
      case 5:
        return WiFiNetworkSecurity.wpa3;
      default:
        return WiFiNetworkSecurity.unknown;
    }
  }
}

OBS: I can make those changes if necessary

[daadu]

@fernando-s97 Looks like good suggestions - Except point 5. plugin name is unique enough to avoid name clashes + generated plugin scaffold does not add org name as prefix - will keep as it is.

If you got time then can you file new PR with this changes against this branch?

[daadu]

I have been first completing wifi_scan looked like simpler to complete - can you guys review it at #205.