got assignment template variables and replacement working

Management.Web/Pages/Index.razor

@@ -11,13 +11,11 @@
 
 @inject CanvasService canvas
 @inject CoursePlanner planner
-@inject ICanvasTokenManagement tokenManagement
 
 
 @code
 {
   private bool showNewFile { get; set; } = false;
-  private bool hasCanvasToken { get; set; } = false;
   protected override void OnInitialized()
   {
     planner.StateHasChanged += reload;
@@ -32,29 +30,10 @@
   {
     planner.StateHasChanged -= reload;
   }
-  protected override async Task OnAfterRenderAsync(bool firstRender)
-  {
-    if(firstRender)
-    {
-      hasCanvasToken = await tokenManagement.GetCanvasToken() != null;
-      StateHasChanged();
-    }
-  }
 
-  private async Task SetToken(string newToken)
-  {
-    await tokenManagement.SaveCanvasToken(newToken);
-    hasCanvasToken = true;
-    StateHasChanged();
-  }
 }
 <PageTitle>Index</PageTitle>
 
-@if(!hasCanvasToken)
-{
-  <ValidateCanvasToken SetToken="SetToken" />
-}
-
 @if(planner.LocalCourse == null)
 {
   <CurrentFiles />

Management.Web/Program.cs

@@ -19,7 +19,6 @@ var builder = WebApplication.CreateBuilder(args);
 // Add services to the container.
 builder.Services.AddRazorPages();
 builder.Services.AddServerSideBlazor();
-builder.Services.AddScoped<ICanvasTokenManagement, BrowserStorageManagement>();
 builder.Services.AddScoped<IWebRequestor, WebRequestor>();
 builder.Services.AddScoped<CanvasService, CanvasService>();
 builder.Services.AddSingleton<YamlManager>();

Management.Web/Shared/Module/Assignment/AssignmentDetails.razor

@@ -134,7 +134,23 @@
       <div class="card-text">
         <div class="row">
           <div class="col">
-            @Assignment.description
+            @if(Assignment.use_template)
+            {
+              var template = planner.LocalCourse?.AssignmentTemplates.First((t) => t.Id == Assignment.template_id);
+              if(template == null)
+              {
+                System.Console.WriteLine($"Could not find template fof assignment, {Assignment.template_id}");
+              }
+              else
+              {
+                var html = AssignmentTemplate.GetHtml(template, Assignment);
+                @((MarkupString) html)
+              }
+            }
+            else
+            {
+              @Assignment.description
+            }
             
           </div>
           <div class="col-auto">

Management.Web/Shared/Module/Assignment/AssignmentForm/AssignmentDescriptionEditor.razor

@@ -9,6 +9,8 @@
   public bool UseTemplate { get; set; }
   [Parameter]
   public string? TemplateId { get; set; }
+  [Parameter]
+  public Dictionary<string, string> VariableValues { get; set; } = new Dictionary<string, string>();
 
   [Parameter]
   public EventCallback<string> DescriptionChanged { get; set; }
@@ -19,12 +21,14 @@
   [Parameter]
   public EventCallback<string?> TemplateIdChanged { get; set; }
 
-  private string selectedTemplateId { get; set; }
+  [Parameter]
+  public EventCallback<Dictionary<string, string>> VariableValuesChanged { get; set; }
+
   private AssignmentTemplate? selectedTemplate => 
     planner
     .LocalCourse?
     .AssignmentTemplates
-    .FirstOrDefault(t => t.Id == selectedTemplateId);
+    .FirstOrDefault(t => t.Id == TemplateId);
 
 }
 
@@ -55,8 +59,14 @@
       <div class="col-auto text-center">
         <form @onsubmit:preventDefault="true">
           <label for="templateSelect">Templates</label>
-          <select id="templateSelect" class="form-select" @bind="selectedTemplateId">
-            <option></option>
+          <select 
+            id="templateSelect" 
+            class="form-select" 
+            value="@TemplateId"
+            @onchange="async (e) =>
+              await TemplateIdChanged.InvokeAsync(e.Value?.ToString())"
+          >
+            <option value=""></option>
             @foreach (var template in planner.LocalCourse.AssignmentTemplates)
             {
               <option value="@template.Id">@template.Name</option>
@@ -79,6 +89,16 @@
               </label>
               <input
                 class="form-control"
+                value="@VariableValues.GetValueOrDefault(variable, String.Empty)"
+                @oninput="async (e) => 
+                  {
+                    var newValue = e.Value?.ToString() ?? String.Empty;
+                    var newDictionary = new Dictionary<string, string>(VariableValues);
+                    newDictionary[variable] = newValue;
+                    
+                    await VariableValuesChanged.InvokeAsync(newDictionary);
+                  }
+                "
               />
             </div>
           }

Management.Web/Shared/Module/Assignment/AssignmentForm/AssignmentForm.razor

@@ -55,6 +55,7 @@
       .Where(r => !r.Label.Contains(RubricItem.extraCredit))
       .Select(s => s.Points)
       .Sum();
+
     var newAssignment = Assignment with 
     {
       name=name,
@@ -117,6 +118,7 @@
           @bind-Description="description"
           @bind-UseTemplate="useTemplate"
           @bind-TemplateId="templateId"
+          @bind-VariableValues="templateVariables"
         />
       </div>
 

Management.Web/Utils/StorageManagement.cs

@@ -1,28 +0,0 @@
-using Microsoft.AspNetCore.Components.Server.ProtectedBrowserStorage;
-
-public class BrowserStorageManagement : ICanvasTokenManagement
-{
-  // private string moduleStorageKey = "module storage key";
-  // private string assignmentStorageKey = "assignment storage key";
-  private string canvasKey = "canvas key";
-
-  private ProtectedLocalStorage storage { get; }
-
-  public BrowserStorageManagement(ProtectedLocalStorage BrowserStorage)
-  {
-    storage = BrowserStorage;
-  }
-
-  public async Task<string?> GetCanvasToken()
-  {
-    var result = await storage.GetAsync<string>(canvasKey);
-    if (!result.Success)
-      return null;
-    return result.Value;
-  }
-
-  public async Task SaveCanvasToken(string token)
-  {
-    await storage.SetAsync(canvasKey, token);
-  }
-}

Management/Management.csproj

@@ -7,6 +7,7 @@
   </PropertyGroup>
 
   <ItemGroup>
+    <PackageReference Include="Markdig" Version="0.31.0" />
     <PackageReference Include="RestSharp" Version="108.0.3" />
     <PackageReference Include="YamlDotNet" Version="13.1.1" />
   </ItemGroup>

Management/Models/Local/AssignmentTemplate.cs

@@ -15,4 +15,16 @@ public record AssignmentTemplate
 
     return matches.Select(match => match.Groups[1].Value);
   }
+  public static string GetHtml(AssignmentTemplate template, LocalAssignment assignment) 
+  {
+
+    var html = Markdig.Markdown.ToHtml(template.Markdown);
+
+    foreach (KeyValuePair<string, string> entry in assignment.template_variables)
+    {
+      html = html.Replace($"%7B%7B{entry.Key}%7D%7D", entry.Value);
+    }
+    return html;
+  } 
+  
 }

Management/Services/ICanvasTokenManagement.cs

@@ -1,5 +0,0 @@
-public interface ICanvasTokenManagement
-{
-  Task<string?> GetCanvasToken();
-  Task SaveCanvasToken(string token);
-}

Management/Services/WebRequestor.cs

@@ -3,46 +3,33 @@ using RestSharp;
 public class WebRequestor : IWebRequestor
 {
   private const string BaseUrl = "https://snow.instructure.com/api/v1/";
-  private bool tokenSet = false;
+  private string token;
   private RestClient client;
 
-  private ICanvasTokenManagement tokenManagement { get; }
-
-  public WebRequestor(ICanvasTokenManagement tokenManagement)
+  public WebRequestor()
   {
+    token =
+      Environment.GetEnvironmentVariable("CANVAS_TOKEN")
+      ?? throw new Exception("CANVAS_TOKEN not in environment");
     client = new RestClient(BaseUrl);
-    this.tokenManagement = tokenManagement;
+    client.AddDefaultHeader("Authorization", $"Bearer {token}");
   }
 
-  private async Task EnsureCanvasTokenSet()
-  {
-    if (tokenSet)
-      return;
-    
-    var newToken = await tokenManagement.GetCanvasToken();
-    if(newToken == null)
-      throw new Exception("cannot request canvas, no token in storage");
-    
-    client.AddDefaultHeader("Authorization", $"Bearer {newToken}");
-    tokenSet = true;
-  }
+
   public async Task<(T[]?, RestResponse)> GetManyAsync<T>(RestRequest request)
   {
-    await EnsureCanvasTokenSet();
     var response = await client.ExecuteGetAsync(request);
     return (Deserialize<T[]>(response), response);
   }
 
   public async Task<(T?, RestResponse)> GetAsync<T>(RestRequest request)
   {
-    await EnsureCanvasTokenSet();
     var response = await client.ExecuteGetAsync(request);
     return (Deserialize<T>(response), response);
   }
 
   public async Task<RestResponse> PostAsync(RestRequest request)
   {
-    await EnsureCanvasTokenSet();
     var response = await client.ExecutePostAsync(request);
     if (!response.IsSuccessful)
     {
@@ -56,7 +43,6 @@ public class WebRequestor : IWebRequestor
 
   public async Task<(T?, RestResponse)> PostAsync<T>(RestRequest request)
   {
-    await EnsureCanvasTokenSet();
     var response = await client.ExecutePostAsync(request);
     return (Deserialize<T>(response), response);
   }