feat: start adding pagination

client/EorzeaVotes/QuestionManager.cs

@@ -2,6 +2,7 @@ using System.Collections;
 using System.Net.Http.Headers;
 using Dalamud.Game.ClientState.Objects.Enums;
 using EorzeaVotes.Model;
+using EorzeaVotes.Utilities;
 using Newtonsoft.Json;
 
 namespace EorzeaVotes;
@@ -10,8 +11,9 @@ internal class QuestionManager : IDisposable, IReadOnlyList<IQuestion> {
     private Plugin Plugin { get; }
     private HttpClient Http { get; }
 
-    private List<IQuestion> _questions = new();
+    private QuestionsResponse _questions = new();
     private Guid _lastSeenActive = Guid.Empty;
+    private int _page = 1;
 
     internal QuestionManager(Plugin plugin) {
         this.Plugin = plugin;
@@ -29,12 +31,34 @@ internal class QuestionManager : IDisposable, IReadOnlyList<IQuestion> {
         this.Http.Dispose();
     }
 
-    public int Count => this._questions.Count;
+    internal IQuestion? Current => this._questions.Current;
 
-    public IQuestion this[int index] => this._questions[index];
+    internal bool HasNext => this._questions.HasNext;
+
+    internal bool Loading { get; private set; }
+
+    internal int Page {
+        get => this._page;
+        set {
+            if (this.Loading) {
+                return;
+            }
+
+            this._page = Math.Max(1, value);
+            Task.Run(async () => {
+                this.Loading = true;
+                using var notLoading = new OnDispose(() => this.Loading = false);
+                await this.Check();
+            });
+        }
+    }
+
+    public int Count => this._questions.Page.Count;
+
+    public IQuestion this[int index] => this._questions.Page[index];
 
     public IEnumerator<IQuestion> GetEnumerator() {
-        return this._questions.GetEnumerator();
+        return this._questions.Page.GetEnumerator();
     }
 
     IEnumerator IEnumerable.GetEnumerator() {
@@ -102,12 +126,23 @@ internal class QuestionManager : IDisposable, IReadOnlyList<IQuestion> {
         this.Plugin.SaveConfig();
     }
 
+    [Serializable]
+    private class QuestionsResponse {
+        internal IQuestion? Current { get; init; }
+        internal List<IQuestion> Page { get; init; }
+        internal bool HasNext { get; init; }
+    }
+
     internal async Task Check() {
         await this.RegisterIfNecessary();
-        var req = this.MakeMessage(HttpMethod.Get, "/questions");
+        var req = this.MakeMessage(HttpMethod.Get, $"/questions?v=2&page={this._page}");
         var resp = await this.Http.SendAsync(req, HttpCompletionOption.ResponseHeadersRead);
         var json = await resp.Content.ReadAsStringAsync();
-        this._questions = JsonConvert.DeserializeObject<List<IQuestion>>(json, Plugin.SerializerSettings) ?? new List<IQuestion>();
+        this._questions = JsonConvert.DeserializeObject<QuestionsResponse>(json, Plugin.SerializerSettings) ?? new QuestionsResponse {
+            Current = null,
+            Page = new(),
+            HasNext = false,
+        };
         await this.OpenIfNew();
     }
 

client/EorzeaVotes/Ui/ImGuiHelper.cs

@@ -175,4 +175,16 @@ internal static class ImGuiHelper {
         ImGui.SetNextItemWidth(-1);
         return drawInput(label);
     }
+
+    internal static bool IconButton(FontAwesomeIcon icon, string? id = null) {
+        ImGui.PushFont(UiBuilder.IconFont);
+        using var pop = new OnDispose(ImGui.PopFont);
+
+        var label = icon.ToIconString();
+        if (id != null) {
+            label += id;
+        }
+
+        return ImGui.Button(label);
+    }
 }

client/EorzeaVotes/Ui/Tabs/Questions.cs

@@ -1,4 +1,5 @@
 using System.Numerics;
+using Dalamud.Interface;
 using Dalamud.Interface.Utility;
 using EorzeaVotes.Model;
 using EorzeaVotes.Utilities;
@@ -21,14 +22,14 @@ internal class QuestionsTab {
 
         using var endTabItem = new OnDispose(ImGui.EndTabItem);
 
-        if (this.Plugin.Manager.Count == 0) {
+        if (this.Plugin.Manager.Current == null && this.Plugin.Manager.Count == 0) {
             ImGuiHelpers.CenteredText("Fetching questions - please wait...");
             return;
         }
 
         ImGuiHelpers.CenteredText("Active question");
 
-        var active = this.Plugin.Manager.FirstOrDefault(q => q.Active);
+        var active = this.Plugin.Manager.Current;
         if (active == null) {
             ImGui.TextUnformatted("There is no active question at the moment.");
         } else {
@@ -89,16 +90,42 @@ internal class QuestionsTab {
         ImGui.PushTextWrapPos();
         using var pop = new OnDispose(ImGui.PopTextWrapPos);
 
-        foreach (var question in this.Plugin.Manager) {
-            if (question.Active || question is not FullQuestion full) {
-                continue;
-            }
-
-            ImGui.TextUnformatted(full.Text);
-            full.DrawResponses();
-            this.DrawMoreDetailsButton(full);
+        var loading = this.Plugin.Manager.Loading;
 
+        if (loading) {
+            ImGui.TextUnformatted("Loading...");
             ImGui.Spacing();
+        } else {
+            foreach (var question in this.Plugin.Manager) {
+                if (question.Active || question is not FullQuestion full) {
+                    continue;
+                }
+
+                ImGui.TextUnformatted(full.Text);
+                full.DrawResponses();
+                this.DrawMoreDetailsButton(full);
+
+                ImGui.Spacing();
+            }
+        }
+
+        // page buttons
+        using (ImGuiHelper.WithDisabled(loading || this.Plugin.Manager.Page == 1)) {
+            if (ImGuiHelper.IconButton(FontAwesomeIcon.ArrowLeft)) {
+                this.Plugin.Manager.Page -= 1;
+            }
+        }
+
+        ImGui.SameLine();
+
+        ImGui.TextUnformatted($"{this.Plugin.Manager.Page:N0}");
+
+        ImGui.SameLine();
+
+        using (ImGuiHelper.WithDisabled(loading || !this.Plugin.Manager.HasNext)) {
+            if (ImGuiHelper.IconButton(FontAwesomeIcon.ArrowRight)) {
+                this.Plugin.Manager.Page += 1;
+            }
         }
     }
 }