conversion module

def check_map_functions(input_lines):
    """Extracts Earth Engine map function

    Args:
        input_lines (list): List of Earth Engine JavaScrips

    Returns:
        list: Output JavaScript with map function
    """
    output_lines = []
    for index, line in enumerate(input_lines):

        if (".map(function" in line) or (".map (function") in line:

            bracket_index = line.index("{")
            matching_line_index, matching_char_index = find_matching_bracket(
                input_lines, index, bracket_index
            )

            func_start_index = line.index("function")
            func_name = "func_" + random_string()
            func_header = line[func_start_index:].replace(
                "function", "function " + func_name
            )
            output_lines.append("\n")
            output_lines.append(func_header)

            for sub_index, tmp_line in enumerate(
                input_lines[index + 1 : matching_line_index]
            ):
                output_lines.append(tmp_line)
                input_lines[index + 1 + sub_index] = ""

            header_line = line[:func_start_index] + func_name
            header_line = header_line.rstrip()

            func_footer = input_lines[matching_line_index][: matching_char_index + 1]
            output_lines.append(func_footer)

            footer_line = input_lines[matching_line_index][
                matching_char_index + 1 :
            ].strip()
            if footer_line == ")" or footer_line == ");":
                header_line = header_line + footer_line
                footer_line = ""

            input_lines[matching_line_index] = footer_line

            output_lines.append(header_line)
            output_lines.append(footer_line)
        else:
            output_lines.append(line)

    return output_lines

def convert_for_loop(line):
    """Converts JavaScript for loop to Python for loop.

    Args:
        line (str): Input JavaScript for loop

    Returns:
        str: Converted Python for loop.
    """
    new_line = ""
    if "var " in line:
        line = line.replace("var ", "")
    start_index = line.index("(")
    end_index = line.index(")")

    prefix = line[:(start_index)]
    suffix = line[(end_index + 1) :]

    params = line[(start_index + 1) : end_index]

    if " in " in params and params.count(";") == 0:
        new_line = prefix + "{}:".format(params) + suffix
        return new_line

    items = params.split("=")
    param_name = items[0].strip()
    items = params.split(";")

    subitems = []

    for item in items:
        subitems.append(item.split(" ")[-1])

    start = subitems[0]
    end = subitems[1]
    step = subitems[2]

    if "++" in step:
        step = 1
    elif "--" in step:
        step = -1

    prefix = line[:(start_index)]
    suffix = line[(end_index + 1) :]
    new_line = (
        prefix
        + "{} in range({}, {}, {}):".format(param_name, start, end, step)
        + suffix
    )

    return new_line

def create_new_cell(contents, replace=False):
    """Create a new cell in Jupyter notebook based on the contents.

    Args:
        contents (str): A string of Python code.
    """
    from IPython.core.getipython import get_ipython

    shell = get_ipython()
    shell.set_next_input(contents, replace=replace)

def download_gee_app(url, out_file=None):
    """Downloads JavaScript source code from a GEE App

    Args:
        url (str): The URL of the GEE App.
        out_file (str, optional): The output file path for the downloaded JavaScript. Defaults to None.
    """
    cwd = os.getcwd()
    out_file_name = os.path.basename(url) + ".js"
    out_file_path = os.path.join(cwd, out_file_name)
    items = url.split("/")
    items[3] = "javascript"
    items[4] = items[4] + "-modules.json"
    json_url = "/".join(items)
    print("The json url: {}".format(json_url))

    if out_file is not None:
        out_file_path = out_file
        if not out_file_path.endswith("js"):
            out_file_path += ".js"

    out_dir = os.path.dirname(out_file_path)
    if not os.path.exists(out_dir):
        os.makedirs(out_dir)

    json_path = out_file_path + "on"

    try:
        urllib.request.urlretrieve(json_url, json_path)
    except:
        print("The URL is invalid. Please double check the URL.")
        return

    with open(out_file_path, "w") as f1:

        with open(json_path) as f2:
            lines = f2.readlines()
            for line in lines:
                # print(line)
                items = line.split("\\n")
                for index, item in enumerate(items):
                    if (index > 0) and (index < (len(items) - 1)):
                        item = item.replace('\\"', '"')
                        item = item.replace(r"\\", "\n")
                        item = item.replace("\\r", "")
                        f1.write(item + "\n")
    os.remove(json_path)
    print("The JavaScript is saved at: {}".format(out_file_path))

def execute_notebook(in_file):
    """Executes a Jupyter notebook and save output cells

    Args:
        in_file (str): Input Jupyter notebook.
    """
    # command = 'jupyter nbconvert --to notebook --execute ' + in_file + ' --inplace'
    command = 'jupyter nbconvert --to notebook --execute "{}" --inplace'.format(in_file)
    print(os.popen(command).read().rstrip())

def execute_notebook_dir(in_dir):
    """Executes all Jupyter notebooks in the given directory recursively and save output cells.

    Args:
        in_dir (str): Input folder containing notebooks.
    """
    print("Executing Earth Engine Jupyter notebooks ...\n")

    in_dir = os.path.abspath(in_dir)
    files = list(Path(in_dir).rglob("*.ipynb"))
    count = len(files)
    if files is not None:
        for index, file in enumerate(files):
            in_file = str(file)
            print("Processing {}/{}: {} ...".format(index + 1, count, file))
            execute_notebook(in_file)

def find_matching_bracket(lines, start_line_index, start_char_index, matching_char="{"):
    """Finds the position of the matching closing bracket from a list of lines.

    Args:
        lines (list): The input list of lines.
        start_line_index (int): The line index where the starting bracket is located.
        start_char_index (int): The position index of the starting bracket.
        matching_char (str, optional): The starting bracket to search for. Defaults to '{'.

    Returns:
        matching_line_index (int): The line index where the matching closing bracket is located.
        matching_char_index (int): The position index of the matching closing bracket.
    """
    matching_line_index = -1
    matching_char_index = -1

    matching_chars = {"{": "}", "(": ")", "[": "]"}
    if matching_char not in matching_chars.keys():
        print(
            "The matching character must be one of the following: {}".format(
                ", ".join(matching_chars.keys())
            )
        )
        return matching_line_index, matching_char_index

    # Create a deque to use it as a stack.
    d = deque()

    for line_index in range(start_line_index, len(lines)):
        line = lines[line_index]
        # deal with the line where the starting bracket is located.
        if line_index == start_line_index:
            line = lines[line_index][start_char_index:]

        for index, item in enumerate(line):
            # Pops a starting bracket for each closing bracket
            if item == matching_chars[matching_char]:
                d.popleft()
            # Push all starting brackets
            elif item == matching_char:
                d.append(matching_char)

            # If deque becomes empty
            if not d:
                matching_line_index = line_index
                if line_index == start_line_index:
                    matching_char_index = start_char_index + index
                else:
                    matching_char_index = index

                return matching_line_index, matching_char_index

    return matching_line_index, matching_char_index

def format_params(line, sep=":"):
    """Formats keys in a dictionary and adds quotes to the keys.
    For example, {min: 0, max: 10} will result in ('min': 0, 'max': 10)

    Args:
        line (str): A string.
        sep (str, optional): Separator. Defaults to ':'.

    Returns:
        [str]: A string with keys quoted
    """
    # print(line)
    new_line = line
    prefix = ""
    suffix = ""

    if line.strip().startswith("for"):  # skip for loop
        return line

    # find all occurrences of a substring
    def find_all(a_str, sub):
        start = 0
        while True:
            start = a_str.find(sub, start)
            if start == -1:
                return
            yield start
            start += len(sub)  # use start += 1 to find overlapping matches

    indices = list(find_all(line, sep))
    count = len(indices)

    if "{" in line:
        bracket_index = line.index("{")
        if bracket_index < indices[0]:
            prefix = line[: bracket_index + 1]
            line = line[bracket_index + 1 :]

    if count > 0:
        items = line.split(sep)

        if count == 1:
            for i in range(0, count):
                item = items[i].strip()
                if ('"' not in item) and ("'" not in item):
                    new_item = "'" + item + "'"
                    items[i] = items[i].replace(item, new_item)
            new_line = ":".join(items)
        elif count > 1:
            for i in range(0, count):
                item = items[i]
                if "," in item:
                    subitems = item.split(",")
                    subitem = subitems[-1]
                    if ('"' not in subitem) and ("'" not in subitem):
                        new_subitem = "'" + subitem.strip() + "'"
                        subitems[-1] = subitems[-1].replace(subitem, new_subitem)
                        items[i] = ", ".join(subitems)
                else:
                    if ('"' not in item) and ("'" not in item):
                        new_item = "'" + item.strip() + "'"
                        padding = len(item) - len(item.strip())
                        items[i] = " " * padding + item.replace(item, new_item)

            new_line = ":".join(items)

    return prefix + new_line

def get_js_examples(out_dir=None):
    """Gets Earth Engine JavaScript examples from the geemap package.

    Args:
        out_dir (str, optional): The folder to copy the JavaScript examples to. Defaults to None.

    Returns:
        str: The folder containing the JavaScript examples.
    """
    pkg_dir = os.path.dirname(pkg_resources.resource_filename("geemap", "geemap.py"))
    example_dir = os.path.join(pkg_dir, "data")
    js_dir = os.path.join(example_dir, "javascripts")

    files = list(Path(js_dir).rglob("*.js"))
    if out_dir is None:
        out_dir = js_dir
    else:
        if not os.path.exists(out_dir):
            os.makedirs(out_dir)

        for file in files:
            basename = os.path.basename(file)
            out_path = os.path.join(out_dir, basename)
            shutil.copyfile(file, out_path)

    return out_dir

def get_nb_template(download_latest=False, out_file=None):
    """Get the Earth Engine Jupyter notebook template.

    Args:
        download_latest (bool, optional): If True, downloads the latest notebook template from GitHub. Defaults to False.
        out_file (str, optional): Set the output file path of the notebook template. Defaults to None.

    Returns:
        str: The file path of the template.
    """
    pkg_dir = os.path.dirname(pkg_resources.resource_filename("geemap", "geemap.py"))
    example_dir = os.path.join(pkg_dir, "data")
    template_dir = os.path.join(example_dir, "template")
    template_file = os.path.join(template_dir, "template.py")

    if out_file is None:
        out_file = template_file
        return out_file

    if not out_file.endswith(".py"):
        out_file = out_file + ".py"

    if not os.path.exists(os.path.dirname(out_file)):
        os.makedirs(os.path.dirname(out_file))

    if download_latest:
        template_url = "https://raw.githubusercontent.com/giswqs/geemap/master/examples/template/template.py"
        print("Downloading the latest notebook template from {}".format(template_url))
        urllib.request.urlretrieve(template_url, out_file)
    elif out_file is not None:
        shutil.copyfile(template_file, out_file)

    return out_file

def js_snippet_to_py(
    in_js_snippet, add_new_cell=True, import_ee=True, import_geemap=True, show_map=True
):
    """Converts an Earth Engine JavaScript snippet wrapped in triple quotes to Python directly on a Jupyter notebook.

    Args:
        in_js_snippet (str): Earth Engine JavaScript within triple quotes.
        add_new_cell (bool, optional): Whether add the converted Python to a new cell.
        import_ee (bool, optional): Whether to import ee. Defaults to True.
        import_geemap (bool, optional): Whether to import geemap. Defaults to True.
        show_map (bool, optional): Whether to show the map. Defaults to True.

    Returns:
        list: A list of Python script.
    """
    work_dir = os.path.expanduser("~")
    in_js = os.path.join(work_dir, "tmp_js_snippet.js")
    out_py = os.path.join(work_dir, "tmp_py_snippet.py")

    try:
        with open(in_js, "w") as f:
            f.write(in_js_snippet)
        js_to_python(in_js, out_file=out_py, use_qgis=False)

        out_lines = []
        if import_ee:
            out_lines.append("import ee\n")
        if import_geemap:
            out_lines.append("import geemap\n\n")
            out_lines.append("Map = geemap.Map()\n")
        if import_ee:
            out_lines.append("ee.Initialize()\n")
        with open(out_py) as f:
            lines = f.readlines()
            for index, line in enumerate(lines):
                if index < (len(lines) - 1):
                    if line.strip() == "import ee":
                        continue
                    # elif import_ee and (line.strip() == 'import ee'):
                    #     out_lines.append(line)
                    #     out_lines.append('ee.Initialize()\n')
                    #     continue
                    next_line = lines[index + 1]
                    if line.strip() == "" and next_line.strip() == "":
                        continue
                    else:
                        out_lines.append(line)
                elif index == (len(lines) - 1) and lines[index].strip() != "":
                    out_lines.append(line)

        if show_map:
            out_lines.append("Map\n")

        os.remove(in_js)
        os.remove(out_py)

        if add_new_cell:
            contents = "".join(out_lines)
            create_new_cell(contents)
        else:
            return out_lines

    except Exception as e:
        print(e)

def js_to_python(in_file, out_file=None, use_qgis=True, github_repo=None):
    """Converts an Earth Engine JavaScript to Python script.

    Args:
        in_file (str): File path of the input JavaScript.
        out_file (str, optional): File path of the output Python script. Defaults to None.
        use_qgis (bool, optional): Whether to add "from ee_plugin import Map \n" to the output script. Defaults to True.
        github_repo (str, optional): GitHub repo url. Defaults to None.

    Returns:
        list : Python script
    """
    in_file = os.path.abspath(in_file)
    if out_file is None:
        out_file = in_file.replace(".js", ".py")

    root_dir = os.path.dirname(os.path.abspath(__file__))
    if not os.path.isfile(in_file):
        in_file = os.path.join(root_dir, in_file)
    if not os.path.isfile(out_file):
        out_file = os.path.join(root_dir, out_file)

    is_python = False
    add_github_url = False
    qgis_import_str = ""
    if use_qgis:
        qgis_import_str = "from ee_plugin import Map \n"

    github_url = ""
    if github_repo is not None:
        github_url = "# GitHub URL: " + github_repo + in_file + "\n\n"

    math_import = False
    math_import_str = ""

    lines = []
    with open(in_file) as f:
        lines = f.readlines()

        math_import = use_math(lines)

        for line in lines:
            line = line.strip()
            if line == "import ee":
                is_python = True

    if math_import:
        math_import_str = "import math\n"

    output = ""

    if is_python:  # only update the GitHub URL if it is already a GEE Python script
        output = github_url + "".join(map(str, lines))
    else:  # deal with JavaScript

        header = github_url + "import ee \n" + qgis_import_str + math_import_str
        function_defs = []
        output = header + "\n"

        with open(in_file) as f:
            lines = f.readlines()

            # print('Processing {}'.format(in_file))
            lines = check_map_functions(lines)

            for index, line in enumerate(lines):

                if ("/* color" in line) and ("*/" in line):
                    line = (
                        line[: line.index("/*")].lstrip()
                        + line[(line.index("*/") + 2) :]
                    )

                if (
                    ("= function" in line)
                    or ("=function" in line)
                    or line.strip().startswith("function")
                ):
                    bracket_index = line.index("{")
                    matching_line_index, matching_char_index = find_matching_bracket(
                        lines, index, bracket_index
                    )

                    line = line[:bracket_index] + line[bracket_index + 1 :]
                    if matching_line_index == index:
                        line = (
                            line[:matching_char_index] + line[matching_char_index + 1 :]
                        )
                    else:
                        tmp_line = lines[matching_line_index]
                        lines[matching_line_index] = (
                            tmp_line[:matching_char_index]
                            + tmp_line[matching_char_index + 1 :]
                        )

                    line = (
                        line.replace(" = function", "")
                        .replace("=function", "")
                        .replace("function ", "")
                    )
                    if line.lstrip().startswith("//"):
                        line = line.replace("//", "").lstrip()
                        line = (
                            " " * (len(line) - len(line.lstrip()))
                            + "# def "
                            + line.strip()
                            + ":"
                        )
                    else:
                        line = (
                            " " * (len(line) - len(line.lstrip()))
                            + "def "
                            + line.strip()
                            + ":"
                        )
                elif "{" in line:
                    bracket_index = line.index("{")
                    matching_line_index, matching_char_index = find_matching_bracket(
                        lines, index, bracket_index
                    )
                    if (matching_line_index == index) and (":" in line):
                        pass
                    elif ("for (" in line) or ("for(" in line):
                        line = convert_for_loop(line)
                        lines[index] = line
                        bracket_index = line.index("{")
                        (
                            matching_line_index,
                            matching_char_index,
                        ) = find_matching_bracket(lines, index, bracket_index)
                        tmp_line = lines[matching_line_index]
                        lines[matching_line_index] = (
                            tmp_line[:matching_char_index]
                            + tmp_line[matching_char_index + 1 :]
                        )
                        line = line.replace("{", "")

                if line is None:
                    line = ""

                line = line.replace("//", "#")
                line = line.replace("var ", "", 1)
                line = line.replace("/*", "#")
                line = line.replace("*/", "#")
                line = line.replace("true", "True").replace("false", "False")
                line = line.replace("null", "{}")
                line = line.replace(".or", ".Or")
                line = line.replace(".and", ".And")
                line = line.replace(".not", ".Not")
                line = line.replace("visualize({", "visualize(**{")
                line = line.replace("Math.PI", "math.pi")
                line = line.replace("Math.", "math.")
                line = line.replace("= new", "=")
                line = line.rstrip()

                if line.endswith("+"):
                    line = line + " \\"
                elif line.endswith(";"):
                    line = line[:-1]

                if line.lstrip().startswith("*"):
                    line = line.replace("*", "#")

                if (
                    (":" in line)
                    and (not line.strip().startswith("#"))
                    and (not line.strip().startswith("def"))
                    and (not line.strip().startswith("."))
                ):
                    line = format_params(line)

                if (
                    index < (len(lines) - 1)
                    and line.lstrip().startswith("#")
                    and lines[index + 1].lstrip().startswith(".")
                ):
                    line = ""

                if line.lstrip().startswith("."):
                    if "#" in line:
                        line = line[: line.index("#")]
                    output = output.rstrip() + " " + "\\" + "\n" + line + "\n"
                else:
                    output += line + "\n"

    out_dir = os.path.dirname(out_file)
    if not os.path.exists(out_dir):
        os.makedirs(out_dir)

    with open(out_file, "w") as f:
        f.write(output)

    return output

def js_to_python_dir(in_dir, out_dir=None, use_qgis=True, github_repo=None):
    """Converts all Earth Engine JavaScripts in a folder recursively to Python scripts.

    Args:
        in_dir (str): The input folder containing Earth Engine JavaScripts.
        out_dir (str, optional): The output folder containing Earth Engine Python scripts. Defaults to None.
        use_qgis (bool, optional): Whether to add "from ee_plugin import Map \n" to the output script. Defaults to True.
        github_repo (str, optional): GitHub repo url. Defaults to None.
    """
    print("Converting Earth Engine JavaScripts to Python scripts...\n")
    in_dir = os.path.abspath(in_dir)
    if out_dir is None:
        out_dir = in_dir
    elif not os.path.exists(out_dir):
        out_dir = os.path.abspath(out_dir)
        os.makedirs(out_dir)
    else:
        out_dir = os.path.abspath(out_dir)

    files = list(Path(in_dir).rglob("*.js"))

    for index, in_file in enumerate(files):
        print("Processing {}/{}: {}".format(index + 1, len(files), in_file))
        out_file = os.path.splitext(in_file)[0] + "_qgis.py"
        out_file = out_file.replace(in_dir, out_dir)
        js_to_python(in_file, out_file, use_qgis, github_repo)

def py_to_ipynb(
    in_file, template_file, out_file=None, github_username=None, github_repo=None
):
    """Converts Earth Engine Python script to Jupyter notebook.

    Args:
        in_file (str): Input Earth Engine Python script.
        template_file (str): Input Jupyter notebook template.
        out_file (str, optional)): Output Jupyter notebook.
        github_username (str, optional): GitHub username. Defaults to None.
        github_repo (str, optional): GitHub repo name. Defaults to None.
    """
    in_file = os.path.abspath(in_file)
    if out_file is None:
        out_file = os.path.splitext(in_file)[0].replace("_qgis", "") + ".ipynb"

    out_py_file = os.path.splitext(out_file)[0] + ".py"

    out_dir = os.path.dirname(out_file)
    if not os.path.exists(out_dir):
        os.makedirs(out_dir)
    if out_dir == os.path.dirname(in_file):
        out_py_file = os.path.splitext(out_file)[0] + ".py"

    content = remove_qgis_import(in_file)
    header = template_header(template_file)
    footer = template_footer(template_file)

    if (github_username is not None) and (github_repo is not None):

        out_py_path = str(out_file).split("/")
        index = out_py_path.index(github_repo)
        out_py_relative_path = "/".join(out_py_path[index + 1 :])
        out_ipynb_relative_path = out_py_relative_path.replace(".py", ".ipynb")

        new_header = []
        for index, line in enumerate(header):
            if index < 9:  # Change Google Colab and binder URLs
                line = line.replace("giswqs", github_username)
                line = line.replace("geemap", github_repo)
                line = line.replace(
                    "examples/template/template.ipynb", out_ipynb_relative_path
                )
            new_header.append(line)
        header = new_header

    if content != None:
        out_text = header + content + footer
    else:
        out_text = header + footer

    if not os.path.exists(os.path.dirname(out_py_file)):
        os.makedirs(os.path.dirname(out_py_file))

    with open(out_py_file, "w") as f:
        f.writelines(out_text)

    try:
        # command = 'ipynb-py-convert ' + out_py_file + ' ' + out_file
        command = 'ipynb-py-convert "{}" "{}"'.format(out_py_file, out_file)
        print(os.popen(command).read().rstrip())
        # os.popen(command)
    except:
        print("Please install ipynb-py-convert using the following command:\n")
        print("pip install ipynb-py-convert")

def py_to_ipynb_dir(
    in_dir, template_file, out_dir=None, github_username=None, github_repo=None
):
    """Converts Earth Engine Python scripts in a folder recursively to Jupyter notebooks.

    Args:
        in_dir (str): Input folder containing Earth Engine Python scripts.
        template_file (str): Input jupyter notebook template file.
        out_dir str, optional): Output folder. Defaults to None.
        github_username (str, optional): GitHub username. Defaults to None.
        github_repo (str, optional): GitHub repo name. Defaults to None.
    """
    print("Converting Earth Engine Python scripts to Jupyter notebooks ...\n")

    in_dir = os.path.abspath(in_dir)
    files = []
    qgis_files = list(Path(in_dir).rglob("*_qgis.py"))
    py_files = list(Path(in_dir).rglob("*.py"))

    if len(qgis_files) == len(py_files) / 2:
        files = qgis_files
    else:
        files = py_files

    if out_dir is None:
        out_dir = in_dir
    elif not os.path.exists(out_dir):
        out_dir = os.path.abspath(out_dir)
        os.makedirs(out_dir)
    else:
        out_dir = os.path.abspath(out_dir)

    for index, file in enumerate(files):
        in_file = str(file)
        out_file = (
            in_file.replace(in_dir, out_dir)
            .replace("_qgis", "")
            .replace(".py", ".ipynb")
        )
        print("Processing {}/{}: {}".format(index + 1, len(files), in_file))
        py_to_ipynb(in_file, template_file, out_file, github_username, github_repo)

def remove_qgis_import(in_file):
    """Removes 'from ee_plugin import Map' from an Earth Engine Python script.

    Args:
        in_file (str): Input file path of the Python script.

    Returns:
        list: List of lines  'from ee_plugin import Map' removed.
    """
    in_file = os.path.abspath(in_file)
    start_index = 0
    with open(in_file) as f:
        lines = f.readlines()
        for index, line in enumerate(lines):
            if "from ee_plugin import Map" in line:
                start_index = index

                i = 1
                while True:
                    line_tmp = lines[start_index + i].strip()
                    if line_tmp != "":
                        return lines[start_index + i :]
                    else:
                        i = i + 1

def template_footer(in_template):
    """Extracts footer from the notebook template.

    Args:
        in_template (str): Input notebook template file path.

    Returns:
        list: List of lines.
    """
    footer = []
    template_lines = []
    footer_start_index = 0

    with open(in_template) as f:
        template_lines = f.readlines()
        for index, line in enumerate(template_lines):
            if "## Display Earth Engine data layers" in line:
                footer_start_index = index - 3

    footer = ["\n"] + template_lines[footer_start_index:]

    return footer

def template_header(in_template):
    """Extracts header from the notebook template.

    Args:
        in_template (str): Input notebook template file path.

    Returns:
        list: List of lines.
    """
    header = []
    template_lines = []
    header_end_index = 0

    with open(in_template) as f:
        template_lines = f.readlines()
        for index, line in enumerate(template_lines):
            if "## Add Earth Engine Python script" in line:
                header_end_index = index + 5

    header = template_lines[:header_end_index]

    return header

def update_nb_header(in_file, github_username=None, github_repo=None):
    """Updates notebook header (binder and Google Colab URLs).

    Args:
        in_file (str): The input Jupyter notebook.
        github_username (str, optional): GitHub username. Defaults to None.
        github_repo (str, optional): GitHub repo name. Defaults to None.
    """
    if github_username is None:
        github_username = "giswqs"
    if github_repo is None:
        github_repo = "geemap"

    index = in_file.index(github_repo)
    file_relative_path = in_file[index + len(github_repo) + 1 :]

    output_lines = []

    with open(in_file) as f:
        lines = f.readlines()
        start_line_index = 2
        start_char_index = lines[start_line_index].index("{")
        matching_line_index, matching_char_index = find_matching_bracket(
            lines, start_line_index, start_char_index
        )

        header = lines[:matching_line_index]
        content = lines[matching_line_index:]

        new_header = []
        search_string = ""
        for line in header:
            line = line.replace("giswqs", github_username)
            line = line.replace("geemap", github_repo)
            if "master?filepath=" in line:
                search_string = "master?filepath="
                start_index = line.index(search_string) + len(search_string)
                end_index = line.index(".ipynb") + 6
                relative_path = line[start_index:end_index]
                line = line.replace(relative_path, file_relative_path)
            elif "/master/" in line:
                search_string = "/master/"
                start_index = line.index(search_string) + len(search_string)
                end_index = line.index(".ipynb") + 6
                relative_path = line[start_index:end_index]
                line = line.replace(relative_path, file_relative_path)
            new_header.append(line)

        output_lines = new_header + content

        with open(in_file, "w") as f:
            f.writelines(output_lines)

def update_nb_header_dir(in_dir, github_username=None, github_repo=None):
    """Updates header (binder and Google Colab URLs) of all notebooks in a folder .

    Args:
        in_dir (str): The input directory containing Jupyter notebooks.
        github_username (str, optional): GitHub username. Defaults to None.
        github_repo (str, optional): GitHub repo name. Defaults to None.
    """
    files = list(Path(in_dir).rglob("*.ipynb"))
    for index, file in enumerate(files):
        file = str(file)
        if ".ipynb_checkpoints" in file:
            del files[index]
    count = len(files)
    if files is not None:
        for index, file in enumerate(files):
            in_file = str(file)
            print("Processing {}/{}: {} ...".format(index + 1, count, file))
            update_nb_header(in_file, github_username, github_repo)

def use_math(lines):
    """Checks if an Earth Engine uses Math library

    Args:
        lines (list): An Earth Engine JavaScript.

    Returns:
        [bool]: Returns True if the script contains 'Math.'. For example 'Math.PI', 'Math.pow'
    """
    math_import = False
    for line in lines:
        if "Math." in line:
            math_import = True

    return math_import