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The app now notifies the user on the homescreen when a new version is available.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,16 @@ | ||
| import 'package:json_annotation/json_annotation.dart'; | ||
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| part 'github_tag.g.dart'; | ||
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| // To build the code generateion run: | ||
| // flutter pub run build_runner build | ||
| @JsonSerializable() | ||
| class Tag { | ||
| String name; | ||
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| Tag({required this.name}); | ||
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| factory Tag.fromJSON(Map<String, dynamic> json) => _$TagFromJson(json); | ||
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| Map<String, dynamic> toJson() => _$TagToJson(this); | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,41 @@ | ||
| // Model for the very popular semantic versioning | ||
| // https://semver.org/ | ||
| class Semver implements Comparable { | ||
| int major; | ||
| int minor; | ||
| int patch; | ||
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| Semver(this.major, this.minor, this.patch); | ||
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| static Semver parse(String text) { | ||
| List<String> parts = text.split("."); | ||
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| if (parts.length != 3) | ||
| throw "Semanticversining Validation Error (not enough numbers)"; | ||
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| return Semver( | ||
| int.parse(parts[0]), | ||
| int.parse(parts[1]), | ||
| int.parse(parts[2]), | ||
| ); | ||
| } | ||
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| @override | ||
| int compareTo(dynamic other) { | ||
| if (this.major < other.major) return -1; | ||
| if (this.major > other.major) return 1; | ||
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| if (this.minor < other.minor) return -1; | ||
| if (this.minor > other.minor) return 1; | ||
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| if (this.patch < other.patch) return -1; | ||
| if (this.patch > other.patch) return 1; | ||
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| return 0; | ||
| } | ||
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| @override | ||
| String toString() { | ||
| return "$major.$minor.$patch"; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| import 'dart:convert'; | ||
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| import 'package:package_info_plus/package_info_plus.dart'; | ||
| import 'package:shared_preferences/shared_preferences.dart'; | ||
| import 'package:tu_wien_addressbook/models/github_tag.dart'; | ||
| import 'package:tu_wien_addressbook/models/semver.dart'; | ||
| import 'package:http/http.dart' as http; | ||
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| /// This class is used to check with GitHub if there is a new version available. | ||
| /// To achive its goal the class gets the name of the latest | ||
| /// tag (semantic versioning) and compares it to its own tag. If the tag on | ||
| /// GitHub is higher, it means that there is a new version. | ||
| class UpdateManager { | ||
| UpdateManager(); | ||
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| Future<bool> hasNewerVersion() async { | ||
| PackageInfo packageInfo = await PackageInfo.fromPlatform(); | ||
| Semver currentVersion = Semver.parse(packageInfo.version); | ||
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| print("Downloading version from GitHub..."); | ||
| Uri url = Uri.parse( | ||
| "https://api.github.com/repos/flofriday/TU_Wien_Addressbook/tags"); | ||
| var response = await http.get(url); | ||
| if (response.statusCode != 200) { | ||
| // Ok the either the internet / service is currently not availabel, or | ||
| // we got ratelimited whatever. Just do not update the cache and | ||
| // say that there is no version available. | ||
| print( | ||
| 'Requesting the version from GitHub returned ${response.statusCode}'); | ||
| return false; | ||
| } | ||
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| List<Tag> tags = (jsonDecode(response.body) as List) | ||
| .map((data) => Tag.fromJSON(data)) | ||
| .toList(); | ||
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| // Check if there are maybe just no versions. | ||
| if (tags.isEmpty) return false; | ||
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| // Parse the newest available version and add it to the cache | ||
| Semver updateVersion = Semver.parse(tags[0].name); | ||
| print("GitHub version: ${updateVersion.toString()}"); | ||
| print("Current version: ${currentVersion.toString()}"); | ||
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| return currentVersion.compareTo(updateVersion) < 0; | ||
| } | ||
| } |
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