/*
    Publish.js

    This script publish the blog post object to a static HTML into the webroot

    Require paramter:
    filepath //The filepath of the post object
    webroot //The webroot of the current ArozOS user
*/

requirelib("filelib");
requirelib("appdata");
includes("config.js");
includes("helper.js");
includes("indexManager.js");

//Inject content into template
function applyTemplate(templateFilepath, templateObjects){
    var templateContent = appdata.readFile(templateFilepath);
    if (templateContent == false){
        return false;
    }

    for (var i = 0; i < templateObjects.length; i++){
        var thisObject = templateObjects[i];
        templateContent = templateContent.split("{{" + thisObject.key + "}}").join(thisObject.value);
    }

    return templateContent;
}

function loadFooter(){
    var footerTemplate = appdata.readFile("Blog/template/footer.html");
    if (footerTemplate == false){
        return "Powered by ArozOS Blog Engine";
    }else{
        return footerTemplate;
    }
}

function loadBlogInfo(){
    return ["My Blog", "An amazing blog written by me!"]
}


//Main function to publish the file to webroot
function publish(){
    //Check if the blog post object exists
    if (!filelib.fileExists(filepath)){
        retrunErrorObject("Given post not exists: " + filepath);
        return
    }

    //Get its content. Validate it correctless
    var content = filelib.readFile(filepath);
    if (typeof(content) == "undefined" || typeof(content) == "null" || content == ""){
        retrunErrorObject("Invalid blog post object");
        return
    }

    //Get the modification time of the file as blog date
    var modtime = filelib.mtime(filepath, false);
    var blogInfo = loadBlogInfo();
    var blogObject = JSON.parse(content);

    //Apply template
    var renderedPage = applyTemplate("Blog/template/post.html", [
        {key: "blog_title", value: blogInfo[0]},
        {key: "blog_subtitle", value: blogInfo[1]},
        {key: "post_date", value: modtime},
        {key: "post_title", value: blogObject.Title},
        {key: "post_tags", value: blogObject.Tags.join(", ")},
        {key: "post_content", value: blogObject.Content},
        {key: "footer", value: loadFooter()}
    ]);

    //Create the posts folder if not exists
    if (!filelib.fileExists(webroot + "/blog/posts/")){
        filelib.mkdir(webroot + "/blog/posts/");
    }

    //Write out to the user web root
    webroot = filepathClean(webroot);
    var postObjectName = filepath.split("/").pop();
    postObjectName = postObjectName.replace(".json", "");

    var targetPostLocation = webroot + "/blog/posts/" + postObjectName + ".html";
    filelib.writeFile(targetPostLocation, renderedPage);

    //Update the index file
    injectTitleIntoPostList(webroot, postObjectName)

}

publish();