export async function confirmOverwriteSettings()

in appservice/src/confirmOverwriteSettings.ts [11:80]
60 lines of code
17 McCabe index (conditional complexity)

export async function confirmOverwriteSettings(context: IActionContext, sourceSettings: { [key: string]: string }, destinationSettings: { [key: string]: string }, destinationName: string): Promise<void> {
    let suppressPrompt: boolean = false;
    let overwriteSetting: boolean = false;

    const addedKeys: string[] = [];
    const updatedKeys: string[] = [];
    const userIgnoredKeys: string[] = [];
    const matchingKeys: string[] = [];

    for (const srcKey of Object.keys(sourceSettings)) {
        // App setting keys are case insensitive, so find the destination key that matches
        const destKey = Object.keys(destinationSettings).find(dk => srcKey.toLowerCase() === dk.toLowerCase()) || srcKey;

        if (destinationSettings[destKey] === undefined) {
            addedKeys.push(destKey);
            destinationSettings[destKey] = sourceSettings[srcKey];
        } else if (destinationSettings[destKey] === sourceSettings[srcKey]) {
            matchingKeys.push(destKey);
        } else if (sourceSettings[srcKey]) { // ignore empty settings
            if (!suppressPrompt) {
                const yesToAll: MessageItem = { title: localize('yesToAll', 'Yes to all') };
                const noToAll: MessageItem = { title: localize('noToAll', 'No to all') };
                const message: string = localize('overwriteSetting', 'Setting "{0}" already exists in "{1}". Overwrite?', destKey, destinationName);
                const result: MessageItem = await context.ui.showWarningMessage(message, { modal: true, stepName: 'confirmOverwriteSetting' }, DialogResponses.yes, yesToAll, DialogResponses.no, noToAll);
                if (result === DialogResponses.yes) {
                    overwriteSetting = true;
                } else if (result === yesToAll) {
                    overwriteSetting = true;
                    suppressPrompt = true;
                } else if (result === DialogResponses.no) {
                    overwriteSetting = false;
                } else if (result === noToAll) {
                    overwriteSetting = false;
                    suppressPrompt = true;
                }
            }

            if (overwriteSetting) {
                updatedKeys.push(destKey);
                destinationSettings[destKey] = sourceSettings[srcKey];
            } else {
                userIgnoredKeys.push(destKey);
            }
        }
    }

    if (addedKeys.length > 0) {
        ext.outputChannel.appendLog(localize('addedKeys', 'Added the following settings:'));
        addedKeys.forEach(logKey);
    }

    if (updatedKeys.length > 0) {
        ext.outputChannel.appendLog(localize('updatedKeys', 'Updated the following settings:'));
        updatedKeys.forEach(logKey);
    }

    if (matchingKeys.length > 0) {
        ext.outputChannel.appendLog(localize('matchingKeys', 'Ignored the following settings that were already the same:'));
        matchingKeys.forEach(logKey);
    }

    if (userIgnoredKeys.length > 0) {
        ext.outputChannel.appendLog(localize('userIgnoredKeys', 'Ignored the following settings based on user input:'));
        userIgnoredKeys.forEach(logKey);
    }

    if (Object.keys(destinationSettings).length > Object.keys(sourceSettings).length) {
        ext.outputChannel.appendLog(localize('noDeleteKey', 'WARNING: This operation will not delete any settings in "{0}". You must manually delete settings if desired.', destinationName));
    }
}