Reset repo feature

backend/LexBoxApi/Controllers/ProjectController.cs

@@ -67,6 +67,22 @@ public async Task<ActionResult<int>> AddLexboxSuffix()
             .ExecuteUpdateAsync(_ => _.SetProperty(p => p.Code, p => p.Code + "-lexbox"));
     }
 
+    [HttpGet("backupProject/{code}")]
+    [AdminRequired]
+    public async Task<IActionResult> BackupProject(string code)
+    {
+        var filename = await _projectService.BackupProject(new Models.Project.ResetProjectByAdminInput(code));
+        var stream = System.IO.File.OpenRead(filename); // Do NOT use "using var stream = ..." as we need to let ASP.NET Core handle the disposal after the download completes
+        return File(stream, "application/zip", filename);
+    }
+
+    [HttpPost("resetProject/{code}")]
+    [AdminRequired]
+    public async Task<ActionResult<string>> ResetProject(string code)
+    {
+        return await _projectService.ResetProject(new Models.Project.ResetProjectByAdminInput(code));
+    }
+
     [HttpDelete("project/{id}")]
     [ProducesResponseType(StatusCodes.Status200OK)]
     [ProducesResponseType(StatusCodes.Status404NotFound)]

backend/LexBoxApi/Models/Project/ChangeProjectInputs.cs

@@ -5,3 +5,5 @@ public record ChangeProjectNameInput(Guid ProjectId, string Name);
 public record ChangeProjectDescriptionInput(Guid ProjectId, string Description);
 
 public record DeleteUserByAdminOrSelfInput(Guid UserId);
+
+public record ResetProjectByAdminInput(string Code);

backend/LexBoxApi/Services/HgService.cs

@@ -1,3 +1,6 @@
+using System.Globalization;
+using System.IO;
+using System.IO.Compression;
 using System.Text.Json;
 using System.Text.Json.Nodes;
 using LexBoxApi.Config;
@@ -39,6 +42,38 @@ public async Task DeleteRepo(string code)
         await Task.Run(() => Directory.Delete(Path.Combine(_options.Value.RepoPath, code), true));
     }
 
+    public async Task<string> BackupRepo(string code)
+    {
+        string tempPath = Path.GetTempPath();
+        string timestamp = DateTime.UtcNow.ToString(DateTimeFormatInfo.InvariantInfo.SortableDateTimePattern).Replace(':', '-');
+        string baseName = $"backup-{code}-{timestamp}.zip";
+        string filename = Path.Join(tempPath, baseName);
+        // TODO: Check if a backup has been taken within the past 30 minutes, and return that backup instead of making a new one
+        // This would allow resuming an interrupted download
+        await Task.Run(() => ZipFile.CreateFromDirectory(Path.Combine(_options.Value.RepoPath, code), filename));
+        return filename;
+    }
+
+    public async Task<string> ResetRepo(string code)
+    {
+        string timestamp = DateTimeOffset.UtcNow.ToString("yyyy_MM_dd_HHmmss");
+        // TODO: Make that "yyyy_MM_dd_HHmmss" string a constant somewhere, then reference it here and in ProjectMutations.SoftDeleteProject
+        await SoftDeleteRepo(code, timestamp);
+        await InitRepo(code);
+        return backupPath;
+    }
+
+    public async Task RevertRepo(string code, string revHash)
+    {
+        // Steps:
+        // 1. Rename repo to repo-backup-date (verifying first that it does not exist, adding -NNN at the end (001, 002, 003) if it does)
+        // 2. Make empty directory (NOT a repo yet) with this project code
+        // 3. Clone repo-backup-date-NNN into empty directory, passing "-r revHash" param
+        // 4. Copy .hg/hgrc from backup dir, overwriting the one in the cloned dir
+        //
+        // Will need an SSH key as a k8s secret, put it into authorized_keys on the hgweb side so that lexbox can do "ssh hgweb hg clone ..."
+    }
+
     public async Task SoftDeleteRepo(string code, string deletedRepoSuffix)
     {
         var deletedRepoName = $"{code}__{deletedRepoSuffix}";

backend/LexBoxApi/Services/ProjectService.cs

@@ -39,6 +39,18 @@ public async Task<Guid> CreateProject(CreateProjectInput input, Guid userId)
         return projectId;
     }
 
+    public async Task<string> BackupProject(ResetProjectByAdminInput input)
+    {
+        var backupFile = await _hgService.BackupRepo(input.Code);
+        return backupFile;
+    }
+
+    public async Task<string> ResetProject(ResetProjectByAdminInput input)
+    {
+        var backupPath = await _hgService.ResetRepo(input.Code);
+        return backupPath;
+    }
+
     public async Task<DateTimeOffset?> UpdateLastCommit(string projectCode)
     {
         var lastCommitFromHg = await _hgService.GetLastCommitTimeFromHg(projectCode);

backend/LexCore/ServiceInterfaces/IHgService.cs

@@ -9,4 +9,6 @@ public interface IHgService
     Task<Changeset[]> GetChangesets(string projectCode);
     Task DeleteRepo(string code);
     Task SoftDeleteRepo(string code, string deletedRepoSuffix);
+    Task<string> BackupRepo(string code);
+    Task<string> ResetRepo(string code);
 }

frontend/src/lib/i18n/locales/en.json

@@ -142,8 +142,16 @@
     "change_role_modal": {
       "title": "Choose role for {name}"
     },
+    "reset_project_modal": {
+      "title": "Reset project {name}",
+      "download_button": "Download backup file",
+      "confirm_downloaded": "I confirm that I have downloaded the backup file and verified that it works. I am ready to completely reset the repository history.",
+      "admin_required": "This action can only be performed by site admins",
+      "reset_project": "Reset project (NO UNDO)"
+    },
     "notifications": {
       "role_change": "Project role of {name} set to {role}.",
+      "reset_project": "Project {code} has been reset.",
       "user_delete": "{name} has been removed.",
       "rename_project": "Project name set to {name}.",
       "describe": "Project description has been updated.",

frontend/src/routes/(authenticated)/project/[project_code]/+page.svelte

@@ -17,6 +17,7 @@
   import { notifySuccess, notifyWarning } from '$lib/notify';
   import { DialogResponse } from '$lib/components/modals';
   import type { ErrorMessage } from '$lib/forms';
+  import ResetProjectModal from './ResetProjectModal.svelte';
   import Dropdown from '$lib/components/Dropdown.svelte';
   import { FormField } from '$lib/forms';
   import IconButton from '$lib/components/IconButton.svelte';
@@ -27,6 +28,7 @@
   import { goto } from '$app/navigation';
   import MoreSettings from '$lib/components/MoreSettings.svelte';
   import { Page } from '$lib/layout';
+  import AdminContent from '$lib/layout/AdminContent.svelte';
 
   export let data: PageData;
   $: user = data.user;
@@ -56,6 +58,22 @@
     }
   }
 
+  let resetProjectModal: ResetProjectModal;
+  async function resetProject(): Promise<void> {
+    const response = await resetProjectModal.open();
+    if (response === 'submit') {
+      const url = `/api/project/resetProject/${_project.code}`;
+      const resetResponse = await fetch(url, {method: 'post'});
+      if (resetResponse.ok) {
+        notifySuccess(
+          $t('project_page.notifications.reset_project', {
+            code: _project.code,
+          })
+      );
+      }
+    }
+  }
+
   let removeUserModal: DeleteModal;
   let userToDelete: ProjectUser | undefined;
   async function deleteProjectUser(projectUser: ProjectUser): Promise<void> {
@@ -242,6 +260,9 @@
           {/if}
 
           <ChangeMemberRoleModal projectId={project.id} bind:this={changeMemberRoleModal} />
+          <AdminContent>
+            <ResetProjectModal bind:this={resetProjectModal} code={data.code} />
+          </AdminContent>
 
           <DeleteModal
             bind:this={removeUserModal}
@@ -256,7 +277,6 @@
       </div>
 
       <div class="divider" />
-
       <div class="space-y-2">
         <p class="text-2xl mb-4 flex gap-4 items-baseline">
           {$t('project_page.history')}
@@ -276,10 +296,16 @@
 
         <MoreSettings>
           <button class="btn btn-error" on:click={softDeleteProject}>
-            {$t('delete_project_modal.submit')}<TrashIcon />
           </button>
         </MoreSettings>
       {/if}
+      <AdminContent>
+        <p class="text-2xl mb-4">
+          <button class="btn btn-accent" on:click={() => resetProject()}>
+            {$t('project_page.reset_project_modal.title', {name: project.name})}
+          </button>
+        </p>
+      </AdminContent>
 
       <ConfirmDeleteModal bind:this={deleteProjectModal} i18nScope="delete_project_modal" />
     {:else}

frontend/src/routes/(authenticated)/project/[project_code]/ResetProjectModal.svelte

@@ -0,0 +1,51 @@
+<script lang="ts">
+  import Modal, { DialogResponse } from '$lib/components/modals/Modal.svelte';
+  import Form from '$lib/forms/Form.svelte';
+  import t from '$lib/i18n';
+  import Button from '$lib/forms/Button.svelte';
+
+  let modal: Modal;
+  export let code: string;
+
+  export async function open(): Promise<DialogResponse> {
+    console.log('Opening modal', modal);
+    const x = await modal.openModal();
+    console.log('Response', x);
+    return x;
+  }
+
+  export function submit(): void {
+    modal.submitModal();
+    modal.close();
+  }
+
+  export function close(): void {
+    modal.close();
+  }
+
+  export function resetProject(): void {
+    alert('Would reset project');
+  }
+
+  let confirmCheck = false;
+</script>
+
+<Modal bind:this={modal} on:close={() => close()} bottom>
+  <Form id="modalForm">
+    <p>{$t('project_page.reset_project_modal.title', {code})}</p>
+    <a rel="external" target="_blank" href="/api/project/backupProject/{code}" download>
+        <span class="btn">{$t('project_page.reset_project_modal.download_button')}</span>
+    </a>
+    <div class="form-control">
+      <label class="label cursor-pointer">
+        <input type="checkbox" bind:checked={confirmCheck} class="checkbox" />
+        <span class="label-text ml-2">{$t('project_page.reset_project_modal.confirm_downloaded')}</span>
+      </label>
+    </div>
+  </Form>
+  <svelte:fragment slot="actions" let:submitting>
+    <Button type="submit" style="btn-primary" on:click={submit} loading={submitting} disabled={!confirmCheck}>
+      <span>{$t('project_page.reset_project_modal.reset_project')}</span>
+    </Button>
+  </svelte:fragment>
+</Modal>