template_converter.py

import re


def convert_into_html(template, data, columns, **kwargs):

    def get_media_file(media_name):
        # return the <img> tag for the media_name
        for i in range(len(kwargs['media_files']['media'])):

            contenttype = kwargs["media_files"]["media"][i]["content_type"]
            contenttype = contenttype.split("/")

            if kwargs['media_files']['media'][i]['filename'] == media_name and contenttype[0] == "image":
                media_name = media_name.replace(" ", "")
                output = '<p><img src="cid:'+media_name+'"></p>'
                return output

    output_data = {}
    for i in range(len(columns)):
        output_data[columns[i]] = data[i]

    lines = template.splitlines()
    output = []
    for line in lines:
        # search for ${ any words }
        results = re.findall("\${.+?}", line)
        if results:
            for result in results:
                # remove ${ }
                required_data = re.sub("\${", "", result, 1)
                required_data = re.sub("}", "", required_data, 1)

                # if its a media, [] exists
                if re.search('[.*]', result):
                    required_data = required_data.replace(
                        "[", "").replace("]", "")
                    media = get_media_file(required_data)
                    line = line.replace(result, media, 1)
                    if not re.findall("\${[.+?]}", line) and not re.findall("\${.+?}", line):
                        output.append(line)
                # see if the template required data matches in the dictionary passed down
                elif output_data.get(required_data, False) != False:
                    line = line.replace(result, output_data[required_data], 1)
                    # only append when there is no match anymore, to avoid duplicate
                    if not re.findall("\${.+?}", line) and not re.findall("\${[.+?]}", line):
                        output.append(line)
        else:
            output.append(line)
    output_html = ""
    for line in output:
        output_html += line+"<br>"
    return output_html