FreeMind nodes expander by keyword match

freemind-traverse-match.php

<?php

// Define an array of keywords to search for ... somehow
$keywords = array('term1', 'term2', 'term3');

// Define input & output
$input_file = 'input.mm';
// $output_file = 'output.mm';

// Load the FreeMind XML file
$doc = new DOMDocument();
$doc->load($input_file);

// Find all top-level nodes
$nodes = $doc->getElementsByTagName('node');

// Call expandNode on each top-level node
foreach ($nodes as $node) {
    traverseNode($node, $keywords);
}

// Output modified XML file
echo $doc->saveXML();

// Or save it 
// $doc->saveXML($output_file);


##
## Functions
##

// Expand all parent nodes
function traverseNode(&$node, &$keywords) {
    if (matchNode($node, $keywords)) {
        // Recursively expand this and all parent nodes
        expandNode($node);
    }

    // Recursively traverse child nodes
    foreach ($node->childNodes as $child) {
        if ($child->nodeName === 'node') {
            traverseNode($child, $keywords);
        }
        //  else {
        //     $node->setAttribute('FOLDED', 'true');
        // }
    }
}

function expandNode(&$node) {
    $node->setAttribute('FOLDED', 'false');
    if ($node->parentNode && $node->parentNode->nodeName === 'node') {
        expandNode($node->parentNode);
    }
}

// Check if any of the keywords are found in the node's text
function matchNode(&$node, &$keywords) {
    foreach ($keywords as $keyword) {
        if (stripos($node->getAttribute('TEXT'), $keyword) !== false) {
            return true;
        }
    }
    return false;
}