From 20ae646561f204004960fb050a2f4bb189bce9ff Mon Sep 17 00:00:00 2001
From: Thomas Basler <thomas@familie-basler.net>
Date: Thu, 5 Jan 2023 01:44:38 +0100
Subject: [PATCH] webapp: Allow download of individual config files

---
 include/WebApi_config.h              |  1 +
 src/WebApi_config.cpp                | 40 +++++++++++++++++++++++++-
 webapp/src/types/Config.ts           |  7 +++++
 webapp/src/views/ConfigAdminView.vue | 43 ++++++++++++++++++++++------
 4 files changed, 82 insertions(+), 9 deletions(-)
 create mode 100644 webapp/src/types/Config.ts

diff --git a/include/WebApi_config.h b/include/WebApi_config.h
index 42bea04..e022af6 100644
--- a/include/WebApi_config.h
+++ b/include/WebApi_config.h
@@ -11,6 +11,7 @@ public:
 private:
     void onConfigGet(AsyncWebServerRequest* request);
     void onConfigDelete(AsyncWebServerRequest* request);
+    void onConfigListGet(AsyncWebServerRequest* request);
     void onConfigUploadFinish(AsyncWebServerRequest* request);
     void onConfigUpload(AsyncWebServerRequest* request, String filename, size_t index, uint8_t* data, size_t len, bool final);
 
diff --git a/src/WebApi_config.cpp b/src/WebApi_config.cpp
index bd08745..a2233d2 100644
--- a/src/WebApi_config.cpp
+++ b/src/WebApi_config.cpp
@@ -22,6 +22,7 @@ void WebApiConfigClass::init(AsyncWebServer* server)
 
     _server->on("/api/config/get", HTTP_GET, std::bind(&WebApiConfigClass::onConfigGet, this, _1));
     _server->on("/api/config/delete", HTTP_POST, std::bind(&WebApiConfigClass::onConfigDelete, this, _1));
+    _server->on("/api/config/list", HTTP_GET, std::bind(&WebApiConfigClass::onConfigListGet, this, _1));
     _server->on("/api/config/upload", HTTP_POST,
         std::bind(&WebApiConfigClass::onConfigUploadFinish, this, _1),
         std::bind(&WebApiConfigClass::onConfigUpload, this, _1, _2, _3, _4, _5, _6));
@@ -37,7 +38,17 @@ void WebApiConfigClass::onConfigGet(AsyncWebServerRequest* request)
         return;
     }
 
-    request->send(LittleFS, CONFIG_FILENAME, String(), true);
+    String requestFile = CONFIG_FILENAME;
+    if (request->hasParam("file")) {
+        String name = "/" + request->getParam("file")->value();
+        if (LittleFS.exists(name)) {
+            requestFile = name;
+        } else {
+            request->send(404);
+        }
+    }
+
+    request->send(LittleFS, requestFile, String(), true);
 }
 
 void WebApiConfigClass::onConfigDelete(AsyncWebServerRequest* request)
@@ -106,6 +117,33 @@ void WebApiConfigClass::onConfigDelete(AsyncWebServerRequest* request)
     ESP.restart();
 }
 
+void WebApiConfigClass::onConfigListGet(AsyncWebServerRequest* request)
+{
+    if (!WebApi.checkCredentials(request)) {
+        return;
+    }
+
+    AsyncJsonResponse* response = new AsyncJsonResponse();
+    JsonObject root = response->getRoot();
+    JsonArray data = root.createNestedArray(F("configs"));
+
+    File rootfs = LittleFS.open("/");
+    File file = rootfs.openNextFile();
+    while (file) {
+        if (file.isDirectory()) {
+            continue;
+        }
+        JsonObject obj = data.createNestedObject();
+        obj["name"] = String(file.name());
+
+        file = rootfs.openNextFile();
+    }
+    file.close();
+
+    response->setLength();
+    request->send(response);
+}
+
 void WebApiConfigClass::onConfigUploadFinish(AsyncWebServerRequest* request)
 {
     if (!WebApi.checkCredentials(request)) {
diff --git a/webapp/src/types/Config.ts b/webapp/src/types/Config.ts
new file mode 100644
index 0000000..74f8311
--- /dev/null
+++ b/webapp/src/types/Config.ts
@@ -0,0 +1,7 @@
+export interface ConfigFileInfo {
+    name: string;
+}
+
+export interface ConfigFileList {
+    configs: Array<ConfigFileInfo>;
+}
\ No newline at end of file
diff --git a/webapp/src/views/ConfigAdminView.vue b/webapp/src/views/ConfigAdminView.vue
index eb90a35..f3690cd 100644
--- a/webapp/src/views/ConfigAdminView.vue
+++ b/webapp/src/views/ConfigAdminView.vue
@@ -5,9 +5,22 @@
         </BootstrapAlert>
 
         <CardElement :text="$t('configadmin.BackupHeader')" textVariant="text-bg-primary" center-content>
-            {{ $t('configadmin.BackupConfig') }}
-            <button class="btn btn-primary" @click="downloadConfig">{{ $t('configadmin.Backup') }}
-            </button>
+            <div class="row g-3 align-items-center">
+                <div class="col-sm">
+                    {{ $t('configadmin.BackupConfig') }}
+                </div>
+                <div class="col-sm">
+                    <select class="form-select" v-model="backupFileSelect">
+                        <option v-for="(file) in fileList.configs" :key="file.name" :value="file.name">
+                            {{ file.name }}
+                        </option>
+                    </select>
+                </div>
+                <div class="col-sm">
+                    <button class="btn btn-primary" @click="downloadConfig">{{ $t('configadmin.Backup') }}
+                    </button>
+                </div>
+            </div>
         </CardElement>
 
         <CardElement :text="$t('configadmin.RestoreHeader')" textVariant="text-bg-primary" center-content add-space>
@@ -89,6 +102,7 @@
 import BasePage from '@/components/BasePage.vue';
 import BootstrapAlert from "@/components/BootstrapAlert.vue";
 import CardElement from '@/components/CardElement.vue';
+import type { ConfigFileList } from '@/types/Config';
 import { authHeader, handleResponse, isLoggedIn } from '@/utils/authentication';
 import * as bootstrap from 'bootstrap';
 import {
@@ -119,14 +133,15 @@ export default defineComponent({
             UploadError: "",
             UploadSuccess: false,
             file: {} as Blob,
+            fileList: {} as ConfigFileList,
+            backupFileSelect: "",
         };
     },
     mounted() {
-        if (!isLoggedIn()) {
-            this.$router.push({ path: "/login", query: { returnUrl: this.$router.currentRoute.value.fullPath } });
-        }
         this.modalFactoryReset = new bootstrap.Modal('#factoryReset');
-        this.loading = false;
+    },
+    created() {
+        this.getFileList();
     },
     methods: {
         onFactoryResetModal() {
@@ -154,8 +169,20 @@ export default defineComponent({
                 )
             this.modalFactoryReset.hide();
         },
+        getFileList() {
+            this.loading = true;
+            fetch("/api/config/list", { headers: authHeader() })
+                .then((response) => handleResponse(response, this.$emitter, this.$router))
+                .then((data) => {
+                    this.fileList = data;
+                    if (this.fileList.configs) {
+                        this.backupFileSelect = this.fileList.configs[0].name;
+                    }
+                    this.loading = false;
+                });
+        },
         downloadConfig() {
-            fetch("/api/config/get", { headers: authHeader() })
+            fetch("/api/config/get?file=" + this.backupFileSelect, { headers: authHeader() })
                 .then(res => res.blob())
                 .then(blob => {
                     var file = window.URL.createObjectURL(blob);