feat: add image uploader settings import/export functionality (#6284)

Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/util/ImageUploader.cpp

@@ -0,0 +1,135 @@
+#include "util/ImageUploader.hpp"
+
+#include "singletons/Settings.hpp"
+
+#include <QJsonDocument>
+#include <QJsonObject>
+
+namespace chatterino::imageuploader::detail {
+
+namespace {
+
+QStringList parseHeaders(const QJsonObject &headersObj)
+{
+    QStringList headerLines;
+    for (auto it = headersObj.begin(); it != headersObj.end(); ++it)
+    {
+        if (it.value().isString())
+        {
+            headerLines.append(
+                QString("%1: %2").arg(it.key(), it.value().toString()));
+        }
+    }
+    return headerLines;
+}
+
+}  // namespace
+
+QJsonObject exportSettings(const Settings &s)
+{
+    QJsonObject settingsObj;
+    settingsObj["Version"] = "1.0.0";
+    settingsObj["Name"] = "Chatterino Image Uploader Settings";
+    settingsObj["RequestMethod"] = "POST";
+    settingsObj["RequestURL"] = s.imageUploaderUrl.getValue();
+    settingsObj["Body"] = "MultipartFormData";
+    settingsObj["FileFormName"] = s.imageUploaderFormField.getValue();
+    settingsObj["URL"] = s.imageUploaderLink.getValue();
+    settingsObj["DeletionURL"] = s.imageUploaderDeletionLink.getValue();
+
+    QString headers = s.imageUploaderHeaders.getValue();
+    if (!headers.isEmpty())
+    {
+        QJsonObject headersObj;
+        QStringList headerLines = headers.split('\n', Qt::SkipEmptyParts);
+        for (const QString &line : headerLines)
+        {
+            QStringList parts = line.split(':', Qt::SkipEmptyParts);
+            if (parts.size() >= 2)
+            {
+                QString key = parts[0].trimmed();
+                QString value = parts.mid(1).join(':').trimmed();
+                headersObj[key] = value;
+            }
+        }
+        if (!headersObj.isEmpty())
+        {
+            settingsObj["Headers"] = headersObj;
+        }
+    }
+
+    return settingsObj;
+}
+
+bool importSettings(const QJsonObject &settingsObj, Settings &s)
+{
+    if (!settingsObj.contains("RequestURL") ||
+        !settingsObj["RequestURL"].isString() ||
+        !settingsObj.contains("FileFormName") ||
+        !settingsObj["FileFormName"].isString() ||
+        !settingsObj.contains("URL") || !settingsObj["URL"].isString())
+    {
+        return false;
+    }
+
+    s.imageUploaderUrl = settingsObj["RequestURL"].toString();
+    s.imageUploaderFormField = settingsObj["FileFormName"].toString();
+    s.imageUploaderLink = settingsObj["URL"].toString();
+
+    if (settingsObj.contains("DeletionURL") &&
+        settingsObj["DeletionURL"].isString())
+    {
+        s.imageUploaderDeletionLink = settingsObj["DeletionURL"].toString();
+    }
+
+    if (settingsObj.contains("Headers") && settingsObj["Headers"].isObject())
+    {
+        QStringList headers = parseHeaders(settingsObj["Headers"].toObject());
+        if (!headers.isEmpty())
+        {
+            s.imageUploaderHeaders = headers.join('\n');
+        }
+    }
+
+    s.imageUploaderEnabled = true;
+
+    return true;
+}
+
+ExpectedStr<QJsonObject> validateImportJson(const QString &clipboardText)
+{
+    if (clipboardText.isEmpty())
+    {
+        return nonstd::make_unexpected("Clipboard must not be empty");
+    }
+
+    QJsonParseError parseError;
+    QJsonDocument doc =
+        QJsonDocument::fromJson(clipboardText.toUtf8(), &parseError);
+
+    if (parseError.error != QJsonParseError::NoError)
+    {
+        return nonstd::make_unexpected("Clipboard did not contain valid JSON");
+    }
+
+    if (!doc.isObject())
+    {
+        return nonstd::make_unexpected("JSON must be an object");
+    }
+
+    auto settingsObj = doc.object();
+
+    if (!settingsObj.contains("Version"))
+    {
+        return nonstd::make_unexpected("JSON must contain the 'Version' key");
+    }
+
+    if (!settingsObj.contains("Name"))
+    {
+        return nonstd::make_unexpected("JSON must contain the 'Name' key");
+    }
+
+    return settingsObj;
+}
+
+}  // namespace chatterino::imageuploader::detail