added support for redirect rules

lib/API/Classes/ShortURL/RedirectRule/condition_device_type.dart

@@ -0,0 +1,42 @@
+enum ConditionDeviceType {
+  IOS,
+  ANDROID,
+  DESKTOP;
+
+  static ConditionDeviceType fromApi(String api) {
+    switch (api) {
+      case "ios":
+        return ConditionDeviceType.IOS;
+      case "android":
+        return ConditionDeviceType.ANDROID;
+      case "desktop":
+        return ConditionDeviceType.DESKTOP;
+    }
+    throw ArgumentError("Invalid type $api");
+  }
+
+}
+
+extension ConditionTypeExtension on ConditionDeviceType {
+
+  String get api {
+    switch (this) {
+      case ConditionDeviceType.IOS:
+        return "ios";
+      case ConditionDeviceType.ANDROID:
+        return "android";
+      case ConditionDeviceType.DESKTOP:
+        return "desktop";
+    }
+  }
+  String get humanReadable {
+    switch (this) {
+      case ConditionDeviceType.IOS:
+        return "iOS";
+      case ConditionDeviceType.ANDROID:
+        return "Android";
+      case ConditionDeviceType.DESKTOP:
+        return "Desktop";
+    }
+  }
+}

lib/API/Classes/ShortURL/RedirectRule/redirect_rule.dart

@@ -0,0 +1,23 @@
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule_condition.dart';
+
+/// Single redirect rule for a short URL.
+class RedirectRule {
+  String longUrl;
+  int priority;
+  List<RedirectRuleCondition> conditions;
+
+  RedirectRule(this.longUrl, this.priority, this.conditions);
+
+  RedirectRule.fromJson(Map<String, dynamic> json)
+    : longUrl = json["longUrl"],
+      priority = json["priority"],
+      conditions = (json["conditions"] as List<dynamic>).map((e)
+      => RedirectRuleCondition.fromJson(e)).toList();
+
+  Map<String, dynamic> toJson() {
+    return {
+      "longUrl": longUrl,
+      "conditions": conditions.map((e) => e.toJson()).toList()
+    };
+  }
+}

lib/API/Classes/ShortURL/RedirectRule/redirect_rule_condition.dart

@@ -0,0 +1,23 @@
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule_condition_type.dart';
+
+class RedirectRuleCondition {
+  RedirectRuleConditionType type;
+  String matchValue;
+  String? matchKey;
+
+  RedirectRuleCondition(String type, this.matchValue, this.matchKey) :
+    type = RedirectRuleConditionType.fromApi(type);
+
+  RedirectRuleCondition.fromJson(Map<String, dynamic> json)
+    : type = RedirectRuleConditionType.fromApi(json["type"]),
+      matchValue = json["matchValue"],
+      matchKey = json["matchKey"];
+
+  Map<String, dynamic> toJson() {
+    return {
+      "type": type.api,
+      "matchValue": matchValue,
+      "matchKey": matchKey
+    };
+  }
+}

lib/API/Classes/ShortURL/RedirectRule/redirect_rule_condition_type.dart

@@ -0,0 +1,42 @@
+enum RedirectRuleConditionType {
+  DEVICE,
+  LANGUAGE,
+  QUERY_PARAM;
+
+  static RedirectRuleConditionType fromApi(String api) {
+    switch (api) {
+      case "device":
+        return RedirectRuleConditionType.DEVICE;
+      case "language":
+        return RedirectRuleConditionType.LANGUAGE;
+      case "query-param":
+        return RedirectRuleConditionType.QUERY_PARAM;
+    }
+    throw ArgumentError("Invalid type $api");
+  }
+
+}
+
+extension ConditionTypeExtension on RedirectRuleConditionType {
+
+  String get api {
+    switch (this) {
+      case RedirectRuleConditionType.DEVICE:
+        return "device";
+      case RedirectRuleConditionType.LANGUAGE:
+        return "language";
+      case RedirectRuleConditionType.QUERY_PARAM:
+        return "query-param";
+    }
+  }
+  String get humanReadable {
+    switch (this) {
+      case RedirectRuleConditionType.DEVICE:
+        return "Device";
+      case RedirectRuleConditionType.LANGUAGE:
+        return "Language";
+      case RedirectRuleConditionType.QUERY_PARAM:
+        return "Query parameter";
+    }
+  }
+}

lib/API/Classes/ShortURL/short_url.dart

@@ -1,6 +1,8 @@
 import 'package:shlink_app/API/Classes/ShortURL/short_url_meta.dart';
 import 'package:shlink_app/API/Classes/ShortURL/visits_summary.dart';
 
+import 'RedirectRule/redirect_rule.dart';
+
 /// Data about a short URL
 class ShortURL {
   /// Slug of the short URL used in the URL
@@ -33,6 +35,8 @@ class ShortURL {
   /// Whether the short URL is crawlable by a web crawler
   bool crawlable;
 
+  List<RedirectRule>? redirectRules;
+
   ShortURL(
       this.shortCode,
       this.shortUrl,

lib/API/Methods/get_redirect_rules.dart

@@ -0,0 +1,46 @@
+import 'dart:async';
+import 'dart:convert';
+import 'package:dartz/dartz.dart';
+import 'package:http/http.dart' as http;
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule.dart';
+import '../server_manager.dart';
+
+/// Gets redirect rules for a given short URL (code).
+FutureOr<Either<List<RedirectRule>, Failure>> apiGetRedirectRules(
+    String shortCode,
+    String? apiKey,
+    String? serverUrl,
+    String apiVersion) async {
+  try {
+    final response =
+    await http.get(Uri.parse("$serverUrl/rest/v$apiVersion/short-urls/$shortCode/redirect-rules"),
+        headers: {
+          "X-Api-Key": apiKey ?? "",
+        });
+    if (response.statusCode == 200) {
+      // get returned redirect rules
+      var jsonBody = jsonDecode(response.body) as Map<String, dynamic>;
+
+      // convert json array to object array
+      List<RedirectRule> redirectRules = (jsonBody["redirectRules"]
+      as List<dynamic>).map((e)
+      => RedirectRule.fromJson(e)).toList();
+
+      return left(redirectRules);
+    } else {
+      try {
+        var jsonBody = jsonDecode(response.body);
+        return right(ApiFailure(
+            type: jsonBody["type"],
+            detail: jsonBody["detail"],
+            title: jsonBody["title"],
+            status: jsonBody["status"],
+            invalidElements: jsonBody["invalidElements"]));
+      } catch (resErr) {
+        return right(RequestFailure(response.statusCode, resErr.toString()));
+      }
+    }
+  } catch (reqErr) {
+    return right(RequestFailure(0, reqErr.toString()));
+  }
+}

lib/API/Methods/set_redirect_rules.dart

@@ -0,0 +1,42 @@
+import 'dart:async';
+import 'dart:convert';
+import 'package:dartz/dartz.dart';
+import 'package:http/http.dart' as http;
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule.dart';
+import '../server_manager.dart';
+
+/// Saves the redirect rules for a given short URL (code).
+FutureOr<Either<bool, Failure>> apiSetRedirectRules(
+    String shortCode,
+    List<RedirectRule> redirectRules,
+    String? apiKey,
+    String? serverUrl,
+    String apiVersion) async {
+  try {
+    Map<String, dynamic> body = {};
+    List<Map<String, dynamic>> redirectRulesJson = redirectRules.map((e) => e.toJson()).toList();
+    body["redirectRules"] = redirectRulesJson;
+    final response =
+    await http.post(Uri.parse("$serverUrl/rest/v$apiVersion/short-urls/$shortCode/redirect-rules"),
+        headers: {
+          "X-Api-Key": apiKey ?? "",
+        }, body: jsonEncode(body));
+    if (response.statusCode == 200) {
+      return left(true);
+    } else {
+      try {
+        var jsonBody = jsonDecode(response.body);
+        return right(ApiFailure(
+            type: jsonBody["type"],
+            detail: jsonBody["detail"],
+            title: jsonBody["title"],
+            status: jsonBody["status"],
+            invalidElements: jsonBody["invalidElements"]));
+      } catch (resErr) {
+        return right(RequestFailure(response.statusCode, resErr.toString()));
+      }
+    }
+  } catch (reqErr) {
+    return right(RequestFailure(0, reqErr.toString()));
+  }
+}

lib/API/server_manager.dart

@@ -3,13 +3,16 @@ import 'package:dartz/dartz.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:shlink_app/API/Classes/ShlinkStats/shlink_stats.dart';
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule.dart';
 import 'package:shlink_app/API/Classes/ShortURL/short_url.dart';
 import 'package:shlink_app/API/Classes/ShortURLSubmission/short_url_submission.dart';
 import 'package:shlink_app/API/Methods/connect.dart';
 import 'package:shlink_app/API/Methods/get_recent_short_urls.dart';
+import 'package:shlink_app/API/Methods/get_redirect_rules.dart';
 import 'package:shlink_app/API/Methods/get_server_health.dart';
 import 'package:shlink_app/API/Methods/get_shlink_stats.dart';
 import 'package:shlink_app/API/Methods/get_short_urls.dart';
+import 'package:shlink_app/API/Methods/set_redirect_rules.dart';
 import 'package:shlink_app/API/Methods/update_short_url.dart';
 
 import 'Methods/delete_short_url.dart';
@@ -124,6 +127,17 @@ class ServerManager {
   FutureOr<Either<List<ShortURL>, Failure>> getRecentShortUrls() async {
     return apiGetRecentShortUrls(apiKey, serverUrl, apiVersion);
   }
+  /// Gets redirect rules for a given short URL (code)
+  FutureOr<Either<List<RedirectRule>, Failure>> getRedirectRules(
+      String shortCode) async {
+    return apiGetRedirectRules(shortCode, apiKey, serverUrl, apiVersion);
+  }
+
+  /// Sets redirect rules for a given short URL (code)
+  FutureOr<Either<bool, Failure>> setRedirectRules(
+      String shortCode, List<RedirectRule> redirectRules) async {
+    return apiSetRedirectRules(shortCode, redirectRules, apiKey, serverUrl, apiVersion);
+  }
 }
 
 /// Server response data type about a page of short URLs from the server

lib/views/redirect_rules_detail_view.dart

@@ -0,0 +1,285 @@
+import 'package:flutter/material.dart';
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/condition_device_type.dart';
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule_condition.dart';
+import 'package:shlink_app/API/Classes/ShortURL/RedirectRule/redirect_rule_condition_type.dart';
+import 'package:shlink_app/API/Classes/ShortURL/short_url.dart';
+import 'package:shlink_app/API/server_manager.dart';
+import '../globals.dart' as globals;
+import '../API/Classes/ShortURL/RedirectRule/redirect_rule.dart';
+
+class RedirectRulesDetailView extends StatefulWidget {
+  const RedirectRulesDetailView({super.key, required this.shortURL});
+
+  final ShortURL shortURL;
+
+  @override
+  State<RedirectRulesDetailView> createState() => _RedirectRulesDetailViewState();
+}
+
+class _RedirectRulesDetailViewState extends State<RedirectRulesDetailView> {
+  List<RedirectRule> redirectRules = [];
+
+  bool redirectRulesLoaded = false;
+
+  bool isSaving = false;
+
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addPostFrameCallback((_) => loadRedirectRules());
+  }
+
+  Future<void> loadRedirectRules() async {
+    final response = await globals.serverManager.getRedirectRules(widget.shortURL.shortCode);
+    response.fold((l) {
+      setState(() {
+        redirectRules = l;
+        redirectRulesLoaded = true;
+      });
+      _sortListByPriority();
+      return true;
+    }, (r) {
+      var text = "";
+      if (r is RequestFailure) {
+        text = r.description;
+      } else {
+        text = (r as ApiFailure).detail;
+      }
+
+      final snackBar = SnackBar(
+          content: Text(text),
+          backgroundColor: Colors.red[400],
+          behavior: SnackBarBehavior.floating);
+      ScaffoldMessenger.of(context).showSnackBar(snackBar);
+      return false;
+    });
+  }
+
+  void _saveRedirectRules() async {
+    final response = await globals.serverManager.setRedirectRules(widget.shortURL.shortCode, redirectRules);
+    response.fold((l) {
+      Navigator.pop(context);
+    }, (r) {
+      var text = "";
+      if (r is RequestFailure) {
+        text = r.description;
+      } else {
+        text = (r as ApiFailure).detail;
+      }
+
+      final snackBar = SnackBar(
+          content: Text(text),
+          backgroundColor: Colors.red[400],
+          behavior: SnackBarBehavior.floating);
+      ScaffoldMessenger.of(context).showSnackBar(snackBar);
+      return false;
+    });
+  }
+
+  void _sortListByPriority() {
+    setState(() {
+      redirectRules.sort((a, b) => a.priority - b.priority);
+    });
+  }
+
+  void _fixPriorities() {
+    for (int i = 0; i < redirectRules.length; i++) {
+      setState(() {
+        redirectRules[i].priority = i + 1;
+      });
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      floatingActionButton: Wrap(
+        spacing: 16,
+        children: [
+          FloatingActionButton(
+              onPressed: ()  {
+                if (!isSaving & redirectRulesLoaded) {
+                  setState(() {
+                    isSaving = true;
+                  });
+                  _saveRedirectRules();
+                }
+              },
+              child: isSaving
+                ? const Padding(
+                padding: EdgeInsets.all(16),
+                child: CircularProgressIndicator(strokeWidth: 3))
+                    : const Icon(Icons.save))
+        ],
+      ),
+      body: CustomScrollView(
+        slivers: [
+          const SliverAppBar.medium(
+            expandedHeight: 120,
+            title: Text(
+              "Redirect Rules",
+              style: TextStyle(fontWeight: FontWeight.bold),
+            ),
+          ),
+          if (redirectRulesLoaded && redirectRules.isEmpty)
+            SliverToBoxAdapter(
+                child: Center(
+                    child: Padding(
+                        padding: const EdgeInsets.only(top: 50),
+                        child: Column(
+                          children: [
+                            const Text(
+                              "No Redirect Rules",
+                              style: TextStyle(
+                                  fontSize: 24,
+                                  fontWeight: FontWeight.bold),
+                            ),
+                            Padding(
+                              padding: const EdgeInsets.only(top: 8),
+                              child: Text(
+                                'Adding redirect rules will be supported soon!',
+                                style: TextStyle(
+                                    fontSize: 16,
+                                    color: Colors.grey[600]),
+                              ),
+                            )
+                          ],
+                        ))))
+          else
+            SliverList(
+                delegate: SliverChildBuilderDelegate(
+                    (BuildContext context, int index) {
+                      return _ListCell(
+                          redirectRule: redirectRules[index],
+                        moveUp: index == 0 ? null : () {
+                            setState(() {
+                              redirectRules[index].priority -= 1;
+                              redirectRules[index - 1].priority += 1;
+                            });
+                            _sortListByPriority();
+                        },
+                        moveDown: index == (redirectRules.length - 1) ? null : () {
+                          setState(() {
+                            redirectRules[index].priority += 1;
+                            redirectRules[index + 1].priority -= 1;
+                          });
+                          _sortListByPriority();
+                        },
+                        delete: () {
+                            setState(() {
+                              redirectRules.removeAt(index);
+                            });
+                            _fixPriorities();
+                        },
+                      );
+                    }, childCount: redirectRules.length))
+        ],
+      ),
+    );
+  }
+}
+
+class _ListCell extends StatefulWidget {
+  const _ListCell({super.key,
+    required this.redirectRule,
+    required this.moveUp,
+    required this.moveDown,
+    required this.delete});
+
+  final VoidCallback? moveUp;
+  final VoidCallback? moveDown;
+  final VoidCallback delete;
+  final RedirectRule redirectRule;
+
+  @override
+  State<_ListCell> createState() => _ListCellState();
+}
+
+class _ListCellState extends State<_ListCell> {
+
+  String _conditionToTagString(RedirectRuleCondition condition) {
+    switch (condition.type) {
+      case RedirectRuleConditionType.DEVICE:
+        return "Device is ${ConditionDeviceType.fromApi(condition.matchValue).humanReadable}";
+      case RedirectRuleConditionType.LANGUAGE:
+        return "Language is ${condition.matchValue}";
+      case RedirectRuleConditionType.QUERY_PARAM:
+        return "Query string contains ${condition.matchKey}=${condition.matchValue}";
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(padding: EdgeInsets.only(
+      left: 8, right: 8
+    ), child: Container(
+      padding: EdgeInsets.only(left: 8, right: 8, top: 16, bottom: 16),
+      decoration: BoxDecoration(
+        border: Border(
+            bottom: BorderSide(
+                color: MediaQuery.of(context).platformBrightness ==
+                    Brightness.dark
+                    ? Colors.grey[800]!
+                    : Colors.grey[300]!)),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
+        children: [
+          Row(
+            children: [
+              const Text("Long URL ", style: TextStyle(fontWeight: FontWeight.bold)),
+              Text(widget.redirectRule.longUrl)
+            ],
+          ),
+          Text("Conditions:", style: TextStyle(fontWeight: FontWeight.bold)),
+          Row(
+            children: [
+              Expanded(
+                child: Wrap(
+                  children: widget.redirectRule.conditions.map((condition) {
+                    return Padding(
+                      padding: const EdgeInsets.only(right: 4, top: 4),
+                      child: Container(
+                        padding:
+                        const EdgeInsets.only(top: 4, bottom: 4, left: 12, right: 12),
+                        decoration: BoxDecoration(
+                          borderRadius: BorderRadius.circular(4),
+                          color: MediaQuery.of(context).platformBrightness == Brightness.dark ?
+                          Colors.grey[900] : Colors.grey[300],
+                        ),
+                        child: Text(
+                            _conditionToTagString(condition)
+                        ),
+                      ),
+                    );
+                  }).toList(),
+                ),
+              )
+            ],
+          ),
+          Wrap(
+            children: [
+              IconButton(
+                disabledColor: MediaQuery.of(context).platformBrightness
+                    == Brightness.dark ? Colors.grey[700] : Colors.grey[400],
+                onPressed: widget.moveUp,
+                icon: Icon(Icons.arrow_upward),
+              ),
+              IconButton(
+                disabledColor: MediaQuery.of(context).platformBrightness
+                    == Brightness.dark ? Colors.grey[700] : Colors.grey[400],
+                onPressed: widget.moveDown,
+                icon: Icon(Icons.arrow_downward),
+              ),
+              IconButton(
+                onPressed: widget.delete,
+                icon: Icon(Icons.delete, color: Colors.red),
+              )
+
+            ],
+          )
+        ],
+      )
+    ));
+  }
+}

lib/views/url_detail_view.dart

@@ -2,6 +2,7 @@ import 'package:flutter/material.dart';
 import 'package:shlink_app/API/Classes/ShortURL/short_url.dart';
 import 'package:intl/intl.dart';
 import 'package:shlink_app/API/server_manager.dart';
+import 'package:shlink_app/views/redirect_rules_detail_view.dart';
 import 'package:shlink_app/views/short_url_edit_view.dart';
 import 'package:shlink_app/widgets/url_tags_list_widget.dart';
 import 'package:url_launcher/url_launcher.dart';
@@ -129,6 +130,8 @@ class _URLDetailViewState extends State<URLDetailView> {
               title: "Short URL", content: shortURL.shortUrl, isUrl: true),
           _ListCell(title: "Long URL", content: shortURL.longUrl, isUrl: true),
           _ListCell(title: "Creation Date", content: shortURL.dateCreated),
+          _ListCell(title: "Redirect Rules", content: null,
+              clickableDetailView: RedirectRulesDetailView(shortURL: shortURL)),
           const _ListCell(title: "Visits", content: ""),
           _ListCell(
               title: "Total", content: shortURL.visitsSummary.total, sub: true),
@@ -163,13 +166,15 @@ class _ListCell extends StatefulWidget {
       required this.content,
       this.sub = false,
       this.last = false,
-      this.isUrl = false});
+      this.isUrl = false,
+      this.clickableDetailView = null});
 
   final String title;
   final dynamic content;
   final bool sub;
   final bool last;
   final bool isUrl;
+  final Widget? clickableDetailView;
 
   @override
   State<_ListCell> createState() => _ListCellState();
@@ -183,11 +188,18 @@ class _ListCellState extends State<_ListCell> {
             padding: EdgeInsets.only(top: 16, bottom: widget.last ? 30 : 0),
             child: GestureDetector(
               onTap: () async {
-                Uri? parsedUrl = Uri.tryParse(widget.content);
-                if (widget.isUrl &&
-                    parsedUrl != null &&
-                    await canLaunchUrl(parsedUrl)) {
-                  launchUrl(parsedUrl);
+                if (widget.clickableDetailView != null) {
+                  Navigator.of(context)
+                      .push(MaterialPageRoute(
+                      builder: (context) =>
+                      widget.clickableDetailView!));
+                } else if (widget.content is String) {
+                  Uri? parsedUrl = Uri.tryParse(widget.content);
+                  if (widget.isUrl &&
+                      parsedUrl != null &&
+                      await canLaunchUrl(parsedUrl)) {
+                    launchUrl(parsedUrl);
+                  }
                 }
               },
               child: Container(
@@ -245,6 +257,8 @@ class _ListCellState extends State<_ListCell> {
                     else if (widget.content is DateTime)
                       Text(DateFormat('yyyy-MM-dd - HH:mm')
                           .format(widget.content))
+                    else if (widget.clickableDetailView != null)
+                        const Icon(Icons.chevron_right)
                     else
                       const Text("N/A")
                   ],