Going in circles with a function

[Joss]

I Have a working function (Yippeee!) 

Well, it should work, I just stole it from sitemap.

Basiclally, I am using it to display all the children from any point in my page tree, downwards.

The function (which is in an included page) goes:

function getChildCategories($page) {
    echo "<ul>";
    echo "<li><a href='{$page->url}'>{$page->title}</a> ";    

    if($page->numChildren) {        
        foreach($page->children as $child) getChildCategories($child);         
    }
    echo "</li>";
    echo "</ul>";
}

and I call it like:

getChildCategories($page); 
 

I want to do a couple of things to change it, and that is where I get stuck.

One

For my other functions, I am using wire("page") rather than $page as suggested by Soma.

But I cant get that to work here. For consistency, how can I change it so I don't need to pass the $page variable?

Two

I want to wrap it in a div as part of the function. This is also to be consistent with what I am doing elsewhere. I am assuming I need to get an output somehow and then return it with divs wrapped round the output. I tried changing echos to $out .= , but I think I got stuck in a never ending loop!

Anyway, my lack of knowledge has defeated me.

Three

(oh, I meant three)

I want to do something similar for calling posts.

So, I have three pages in my tree which are being used as categories - each the child of the other.

My posts use a page field for the category and I grab the posts simply by comparing the page field with the current $page - normal stuff.

I want to now find all the posts that match the children of the current page, all the way down the tree till I fall off the end. And then, return the 10 most recent ones, or something like that.

But initially, just get hold of them. 

I am assuming something recursive has to happen to return an array that I can then use find() with?

Again, lack of knowledge .....

Thanks to any of the usual Gurus!

Joss

[Soma]

Not really sure if it's exactly what you looking for but these should get you there.

// recursively get all children from current page

function getChildCategories($page=null, $level=0) {
    if(!$page) $page = wire('page');
    $level++;
    $out = '';
    $out .= "\n\t<li><a href='{$page->url}'>{$page->title}</a>";
    if($page->children->count()){
        $out .= "\n\t<ul>";
        foreach($page->children as $child){
            $out .= str_replace("\n\t", "\n\t\t", getChildCategories($child, $level));
        }
        $out .= "\n\t</ul>\n\t";
    }
    $out .= "</li>";
    if($level == 1) return "<div><ul>$out\n</ul>\n</div>";
        else return $out;
}

echo getChildCategories();
 

 

And from your point 3. "has_parent" is the key here I think to find all children recursively from a certain page, then get all posts that has at  least one of those selected

// get all children categories of a parent and get most recent posts from all those

function getChildCategoriesPosts($page=null) {
    if(!$page) $page = wire('page');
    $out = '';
    $categories = wire("pages")->find("has_parent=$page,template=category");
    $posts = wire("pages")->find("category=$categories, sort=-modified, limit=10");
    if($posts->count()){
        foreach($page->children as $child) $out .= "<li><a href='{$child->url}'>{$child->title}</a></li>";
    } else {
        return "<li>No Posts found/p>";
    }
   return "<div><ul>$out</ul></div>";
}

echo getChildCategoriesPosts();
 

[Joss]

Thanks Soma, I will go and play with those!

Joss

[Joss]

HI Soma

First works perfectly - and I have learned a lot from that, thanks

Second one was more problematic.

It didn't do anything initially, but I have changed is slightly because in your foreach I think you mean $posts not $page->children?

Changing it worked but I ran into a problem when I tried it on a page that is at the end of branch - it kind of listed everything including most of the contents of the British library!

So I added an IF which I think is right?

Anyway, here is the final

function getChildCategoriesPosts($page=null) {
    if(!$page) $page = wire('page');
    $out = '';
    $categories = wire("pages")->find("has_parent=$page,template=category");
    if($categories->count()){
        $posts = wire("pages")->find("post_category_select=$categories, sort=-modified, limit=10");
        if($posts->count()){
            foreach($posts as $post) $out .= "<li><a href='{$post->url}'>{$post->title}</a></li>";
        } else {
            return "<li>No Posts found/p>";
        }
    }
   return "<div><ul>$out</ul></div>";
}

Thanks again!