Implemented HTML Tools (#240)

Co-authored-by: widlam <mikolaj.widla@gmail.com>
Reviewed-on: #240
Reviewed-by: Adam Bem <bema@noreply.example.com>
Co-authored-by: Mikolaj Widla <widlam@noreply.example.com>
Co-committed-by: Mikolaj Widla <widlam@noreply.example.com>

Backend-libXML/Parser.py

@@ -1,7 +1,28 @@
-from lxml import etree
+from lxml import etree, html
 from io import BytesIO
 
 
+def convertHTML(source: str, sourceFrom: str):
+    htmlParser = html.HTMLParser(remove_comments=True, remove_blank_text=True)
+    xmlParser = etree.XMLParser(remove_comments=True, remove_blank_text=True)
+
+    if sourceFrom == "xml":
+        xmldoc = etree.parse(BytesIO(source.encode("utf-8")), xmlParser)
+        return html.tostring(xmldoc, method="html", pretty_print=True).decode()
+    elif sourceFrom == "html":
+        htmldoc = html.parse(BytesIO(source.encode("utf-8")), htmlParser)
+        return etree.tostring(htmldoc, method="xml", pretty_print=True, doctype="", xml_declaration=True, encoding="utf-8").decode()
+    else:
+        return
+
+
+def formatHTML(source: str, prettify: bool) -> str:
+    parser = html.HTMLParser(remove_blank_text=True, remove_comments=True, remove_pis=True)
+    htmlDoc = html.parse(BytesIO(source.encode("utf-8")),parser=parser)
+    if not prettify:
+        return html.tostring(htmlDoc).decode().replace("\n", "").replace(">    ", ">")
+    return etree.tostring(htmlDoc, encoding='unicode', pretty_print=True)
+
 def formatXML(source: str, prettify: bool) -> str:
     """Method used to format XML
 

Backend-libXML/main.py

@@ -40,6 +40,12 @@ def process_xml(request: request, type: str) -> str:
             response_json['result'] = Parser.formatXML(data, True)
         elif (type == "minimize"):
             response_json['result'] = Parser.formatXML(data, False)
+        elif (type == "prettifyHtml"):
+            response_json['result'] = Parser.formatHTML(data, True)
+        elif (type == "minimizeHtml"):
+            response_json['result'] = Parser.formatHTML(data, False)
+        elif (type == "convertHTML"):
+            response_json['result'] = Parser.convertHTML(data, process)
         else:
             raise ValueError("Valid operation types are: xsd, xslt, xpath")
 
@@ -79,5 +85,17 @@ def prettify():
 def minimize():
     return process_xml(request, "minimize")
 
+@app.route("/html/prettify",methods=["POST"])
+def prettifyHtml():
+    return process_xml(request, "prettifyHtml")
+
+@app.route("/html/minimize",methods=["POST"])
+def minimizeHtml():
+    return process_xml(request, "minimizeHtml")
+
+@app.route("/html/convert",methods=["POST"])
+def XMLToHTMLConvertion():
+    return process_xml(request, "convertHTML")
+
 if __name__ == "__main__":
     app.run()