From 0eb546dfc74080e4cd00772dafb0aa2a46bc4153 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Tue, 1 Aug 2023 16:56:40 +0200
Subject: Add quickmedia_html_node_find_child

---
 include/quickmedia/HtmlSearch.h |  8 ++++++++
 src/HtmlSearch.c                | 31 +++++++++++++++++++++++++++++++
 2 files changed, 39 insertions(+)

diff --git a/include/quickmedia/HtmlSearch.h b/include/quickmedia/HtmlSearch.h
index e2b0ecc..8ce7ff4 100644
--- a/include/quickmedia/HtmlSearch.h
+++ b/include/quickmedia/HtmlSearch.h
@@ -57,6 +57,14 @@ typedef struct {
 */
 QuickMediaStringView quickmedia_html_node_get_attribute_value(QuickMediaHtmlNode *self, const char *attribute_name);
 
+/*
+    Returns NULL if not found.
+    The result is only valid within the callback function scope.
+    This function is not recursive.
+    Case insensitive search.
+*/
+QuickMediaHtmlNode* quickmedia_html_node_find_child(QuickMediaHtmlNode *self, const char *tag_name, const char *attribute_name, const char *attribute_value);
+
 /*
     Returns an empty string if the node doesn't have any text or if there was an error creating the text.
     The result is only valid within the callback function scope.
diff --git a/src/HtmlSearch.c b/src/HtmlSearch.c
index 8449ac9..adf64bd 100644
--- a/src/HtmlSearch.c
+++ b/src/HtmlSearch.c
@@ -450,6 +450,37 @@ QuickMediaStringView quickmedia_html_node_get_attribute_value(QuickMediaHtmlNode
     }
 }
 
+QuickMediaHtmlNode* quickmedia_html_node_find_child(QuickMediaHtmlNode *self, const char *tag_name, const char *attribute_name, const char *attribute_value) {
+    QuickMediaStringView tag;
+    tag.data = tag_name;
+    tag.size = strlen(tag_name);
+
+    QuickMediaStringView attr_name;
+    attr_name.data = attribute_name;
+    attr_name.size = strlen(attribute_name);
+
+    QuickMediaStringView attr_value;
+    attr_value.data = attribute_value;
+    attr_value.size = strlen(attribute_value);
+
+    for(QuickMediaHtmlChildNode *child = self->first_child; child; child = child->next) {
+        if(!child->node.is_tag)
+            continue;
+
+        if(!string_views_equal_case_insensitive(child->node.name, tag))
+            continue;
+
+        QuickMediaHtmlAttribute *attr = get_attribute_by_name(child, attr_name);
+        if(!attr)
+            continue;
+
+        if(string_views_equal_case_insensitive(attr->value, attr_value))
+            return &child->node;
+    }
+
+    return NULL;
+}
+
 static int merge_inner_text(QuickMediaHtmlNode *node, QuickMediaString *str) {
     if(node->is_tag) {
         int newline = 0;
-- 
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