66 lines
2.1 KiB
PHP
66 lines
2.1 KiB
PHP
<?php
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/**
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* Expose active contexts as a context condition.
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*/
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class context_condition_context extends context_condition_path {
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function execute() {
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if ($this->condition_used()) {
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$active_contexts = array_keys(context_active_contexts());
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foreach ($this->get_contexts() as $context) {
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if (!in_array($context->name, $active_contexts, TRUE) && $values = $this->fetch_from_context($context, 'values')) {
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// Always check against the active contexts.
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if ($this->match(array_keys(context_active_contexts()), $values)) {
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$this->condition_met($context);
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}
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}
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}
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// If the list of active contexts has changed, we need to recurse.
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if ($active_contexts != array_keys(context_active_contexts())) {
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$this->execute();
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}
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}
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}
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/**
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* Retrieve all context conditions.
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*
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* This method is slightly adapted to context_condition::get_contexts() in
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* order to ensure that a context that is used as condition in another context
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* gets handled before.
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*/
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function get_contexts($value = NULL) {
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$map = context_condition_map();
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$map = isset($map[$this->plugin]) ? $map[$this->plugin] : array();
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$contexts = array();
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// Add the contexts that are needed for conditions in the other contexts
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// first. Start with the negated ones first, as we can not unset a met
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// condition afterwards.
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krsort($map);
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foreach ($map as $key => $submap) {
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// Negated context conditions start with a "~".
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if (substr($key, 0, 1) == "~") {
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$key = substr($key, 1);
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}
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if (!isset($contexts[$key])) {
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$context = context_load($key);
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// Check if context exists. This will fail for wildcards.
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if ($context) {
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$contexts[$context->name] = $context;
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}
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}
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}
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foreach ($map as $key => $submap) {
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foreach ($submap as $name) {
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if (!isset($contexts[$name])) {
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$context = context_load($name);
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$contexts[$context->name] = $context;
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}
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}
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}
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return $contexts;
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}
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}
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