diff --git a/config.py b/config.py
new file mode 100644
index 0000000..5c7ae7b
--- /dev/null
+++ b/config.py
@@ -0,0 +1,13 @@
+import os
+
+from dotenv import load_dotenv
+
+load_dotenv()
+
+MENU_CRECHE_PDF_URL = os.environ.get("MENU_CRECHE_PDF_URL")
+MENU_TYPE = os.environ.get("MENU_KIND")
+SIGNAL_SENDER = os.environ.get("SIGNAL_SENDER")
+SIGNAL_RECIPIENTS = os.environ.get("SIGNAL_RECIPIENTS", default=SIGNAL_SENDER).split(
+    ","
+)
+SIGNAL_API_URL = os.environ.get("SIGNAL_API_URL")
diff --git a/main.py b/main.py
index d584fa0..73e71fc 100644
--- a/main.py
+++ b/main.py
@@ -1,128 +1,79 @@
 import base64
 import tempfile
 from pathlib import Path
-import os
+
 import requests
 from dotenv import load_dotenv
 from pdfminer.high_level import extract_text
 
+from config import (
+    MENU_CRECHE_PDF_URL,
+    MENU_TYPE,
+    SIGNAL_SENDER,
+    SIGNAL_RECIPIENTS,
+    SIGNAL_API_URL,
+)
+from menus import Menus, MenuMessageFormatter
+from message_sender import SignalMessager
+from pdf_downloader import download
+
 load_dotenv()
 
-def main():
-    menu_link = os.environ.get("MENU_CRECHE_PDF_URL")
-    menu_pdf = requests.get(menu_link).content
-
-    tmp_folder = Path(tempfile.mkdtemp())
-    menu_file = tmp_folder / "menu.pdf"
-    menu_file.write_bytes(menu_pdf)
-
-    text = extract_text(menu_file, page_numbers=[0])
-
-    previous_was_title = False
-    curated_text = ""
-    for line in text.splitlines():
-        if len(line) == 1:
-            previous_was_title = True
-        elif len(line) > 1 and line[1] == " ":
-            curated_text += f"{line[2:]}\n"
-            previous_was_title = True
-        elif len(line) > 0 and line[0].islower():
-            curated_text = curated_text.removesuffix("\n")
-            curated_text += f"{line}\n"
-            previous_was_title = False
-        elif line == '' and previous_was_title:
-            previous_was_title = False
-        else:
-            curated_text += f"{line}\n"
-            previous_was_title = False
-
-    cells = curated_text.split("\n\n")
-
-    # remove month
-    month = cells.pop(0)
-
-    # remove meals titles
-    for i in range(5):
-        cells.pop(0)
-
-    days = []
-    for i in range(5):
-        days.append(cells.pop(0))
-
-    menus = {
-        "introduction": {
-            days[0]: {"midi": cells[0], "gouter": cells[5]},
-            days[1]: {"midi": cells[1], "gouter": cells[6]},
-            days[2]: {"midi": cells[2], "gouter": cells[7]},
-            days[3]: {"midi": cells[3], "gouter": cells[8]},
-            days[4]: {"midi": cells[4], "gouter": cells[9]},
-        },
-        "diversification": {
-            days[0]: {"midi": cells[10], "gouter": cells[15]},
-            days[1]: {"midi": cells[11], "gouter": cells[16]},
-            days[2]: {"midi": cells[12], "gouter": cells[17]},
-            days[3]: {"midi": cells[13], "gouter": cells[18]},
-            days[4]: {"midi": cells[14], "gouter": cells[19]},
-        },
-        "petit musclé": {
-            days[0]: {"midi": cells[20], "gouter": cells[24]},
-            days[1]: {"midi": cells[21], "gouter": cells[25]},
-            days[2]: {"midi": cells[22], "gouter": cells[26]},
-            days[3]: {"midi": cells[23], "gouter": cells[27]},
-            days[4]: {"midi": cells[32], "gouter": cells[39]},
-        },
-        "petit lion": {
-            days[0]: {"midi": cells[28], "gouter": cells[35]},
-            days[1]: {"midi": cells[29], "gouter": cells[36]},
-            days[2]: {"midi": cells[30], "gouter": cells[37]},
-            days[3]: {"midi": cells[31], "gouter": cells[38]},
-            days[4]: {"midi": cells[34], "gouter": cells[33]},
-        }
-    }
-
-    menu = os.environ.get("MENU_KIND")
-
+def send_signal_message(
+    days: list[str], menu: dict[str, dict[str, str]], menu_pdf_file: Path
+) -> None:
     headers = {"Content-Type": "application/json"}
     message = f"""
 **Menu de la crèche** (message automatique)
 
-Menu {menu}:
+Menu {MENU_TYPE}:
 
 {days[0].upper()}:
-*Midi*: {menus[menu][days[0]]["midi"]}
-*Goûter*: {menus[menu][days[0]]["gouter"]}
+*Midi*: {menu[days[0]]["midi"]}
+*Goûter*: {menu[days[0]]["gouter"]}
 
 {days[1].upper()}:
-*Midi*: {menus[menu][days[1]]["midi"]}
-*Goûter*: {menus[menu][days[1]]["gouter"]}
+*Midi*: {menu[days[1]]["midi"]}
+*Goûter*: {menu[days[1]]["gouter"]}
 
 {days[2].upper()}:
-*Midi*: {menus[menu][days[2]]["midi"]}
-*Goûter*: {menus[menu][days[2]]["gouter"]}
+*Midi*: {menu[days[2]]["midi"]}
+*Goûter*: {menu[days[2]]["gouter"]}
 
 {days[3].upper()}:
-*Midi*: {menus[menu][days[3]]["midi"]}
-*Goûter*: {menus[menu][days[3]]["gouter"]}
+*Midi*: {menu[days[3]]["midi"]}
+*Goûter*: {menu[days[3]]["gouter"]}
 
 {days[4].upper()}:
-*Midi*: {menus[menu][days[4]]["midi"]}
-*Goûter*: {menus[menu][days[4]]["gouter"]}
+*Midi*: {menu[days[4]]["midi"]}
+*Goûter*: {menu[days[4]]["gouter"]}
 """
     text_mode = "styled"
-    sender = os.environ.get("SIGNAL_SENDER")
-    recipient = os.environ.get("SIGNAL_RECIPIENT")
-    attachment = base64.b64encode(menu_pdf)
+    attachment = base64.b64encode(menu_pdf_file.read_bytes())
     body = {
         "message": message,
         "text_mode": text_mode,
-        "number": sender,
-        "recipients": [recipient],
-        "base64_attachments": [f"data:application/pdf;filename=menu.pdf;base64,{attachment.decode()}"],
+        "number": SIGNAL_SENDER,
+        "recipients": SIGNAL_RECIPIENTS,
+        "base64_attachments": [
+            f"data:application/pdf;filename=menu.pdf;base64,{attachment.decode()}"
+        ],
     }
-    host = os.environ.get("SIGNAL_API_URL")
 
-    requests.post(host, headers=headers, json=body)
+    requests.post(SIGNAL_API_URL, headers=headers, json=body)
 
 
-if __name__ == '__main__':
+def main():
+    menu_pdf_file = download(MENU_CRECHE_PDF_URL, file_name="menu.pdf")
+
+    menus = Menus(menu_pdf_file)
+
+    message_formatter = MenuMessageFormatter()
+    message = message_formatter.create_message(menus, MENU_TYPE)
+
+    signal_messager = SignalMessager(SIGNAL_API_URL, SIGNAL_SENDER)
+    signal_messager.send_message(message, menu_pdf_file, SIGNAL_RECIPIENTS)
+
+
+if __name__ == "__main__":
     main()
diff --git a/menus.py b/menus.py
new file mode 100644
index 0000000..4811bc5
--- /dev/null
+++ b/menus.py
@@ -0,0 +1,144 @@
+import base64
+from pathlib import Path
+
+from pdfminer.high_level import extract_text
+
+
+class Menus:
+    def __init__(self, menu_pdf_file: Path):
+        self.menu_pdf_file = menu_pdf_file
+
+        self._cells = self.extract_cells()
+        self.month = self.extract_month()
+        self.days = self.extract_days()
+
+        self.introduction = self.extract_introduction_menu()
+        self.diversification = self.extract_diversification_menu()
+        self.petit_muscle = self.extract_petit_muscle_menu()
+        self.petit_lion = self.extract_petit_lion_menu()
+
+    def extract_cells(self) -> list[str]:
+        text = extract_text(self.menu_pdf_file, page_numbers=[0])
+
+        previous_was_title = False
+        curated_text = ""
+        for element in text.splitlines():
+            line = Line(element)
+            if line.is_glitch():
+                previous_was_title = True
+            elif line.starts_with_glitch():
+                curated_text += f"{line.text[2:]}\n"
+                previous_was_title = True
+            elif line.is_part_of_previous_line():
+                curated_text = curated_text.removesuffix("\n")
+                curated_text += f"{line.text}\n"
+                previous_was_title = False
+            elif line.text == "" and previous_was_title:
+                previous_was_title = False
+            else:
+                curated_text += f"{line.text}\n"
+                previous_was_title = False
+
+        return curated_text.split("\n\n")
+
+    def extract_month(self) -> str:
+        return self._cells[0]
+
+    def extract_days(self) -> list[str]:
+        return self._cells[6:11]
+
+    def extract_introduction_menu(self) -> dict[str, dict[str, str]]:
+        return {
+            self.days[0]: self.build_menu_of_day(11, 16),
+            self.days[1]: self.build_menu_of_day(12, 17),
+            self.days[2]: self.build_menu_of_day(13, 18),
+            self.days[3]: self.build_menu_of_day(14, 19),
+            self.days[4]: self.build_menu_of_day(15, 20),
+        }
+
+    def extract_diversification_menu(self) -> dict[str, dict[str, str]]:
+        return {
+            self.days[0]: self.build_menu_of_day(21, 26),
+            self.days[1]: self.build_menu_of_day(22, 27),
+            self.days[2]: self.build_menu_of_day(23, 28),
+            self.days[3]: self.build_menu_of_day(24, 29),
+            self.days[4]: self.build_menu_of_day(25, 30),
+        }
+
+    def extract_petit_muscle_menu(self) -> dict[str, dict[str, str]]:
+        return {
+            self.days[0]: self.build_menu_of_day(31, 35),
+            self.days[1]: self.build_menu_of_day(32, 36),
+            self.days[2]: self.build_menu_of_day(33, 37),
+            self.days[3]: self.build_menu_of_day(34, 38),
+            self.days[4]: self.build_menu_of_day(43, 50),
+        }
+
+    def extract_petit_lion_menu(self):
+        return {
+            self.days[0]: self.build_menu_of_day(39, 46),
+            self.days[1]: self.build_menu_of_day(40, 47),
+            self.days[2]: self.build_menu_of_day(41, 48),
+            self.days[3]: self.build_menu_of_day(42, 49),
+            self.days[4]: self.build_menu_of_day(45, 44),
+        }
+
+    def build_menu_of_day(self, midi: int, gouter: int) -> dict[str, str]:
+        return {"midi": self._cells[midi], "gouter": self._cells[gouter]}
+
+
+class Line:
+    def __init__(self, text: str):
+        self.text = text
+
+    def is_glitch(self) -> bool:
+        return len(self.text) == 1
+
+    def starts_with_glitch(self) -> bool:
+        return len(self.text) > 1 and self.text[1] == " "
+
+    def is_part_of_previous_line(self) -> bool:
+        return len(self.text) > 0 and self.text[0].islower()
+
+
+class MenuMessageFormatter:
+    @staticmethod
+    def create_message(menus: Menus, menu_type: str) -> str:
+        days = menus.days
+        if menu_type.lower() == "introduction":
+            menu = menus.introduction
+        elif menu_type.lower() == "diversification":
+            menu = menus.diversification
+        elif menu_type.lower() == "petit muscle":
+            menu = menus.petit_muscle
+        elif menu_type.lower() == "petit lion":
+            menu = menus.petit_lion
+        else:
+            raise Exception(f"Unknown menu type: {menu_type}")
+
+        return f"""
+**Menu de la crèche** (message automatique)
+
+Menu {menu_type}:
+
+{days[0].upper()}:
+*Midi*: {menu[days[0]]["midi"]}
+*Goûter*: {menu[days[0]]["gouter"]}
+
+{days[1].upper()}:
+*Midi*: {menu[days[1]]["midi"]}
+*Goûter*: {menu[days[1]]["gouter"]}
+
+{days[2].upper()}:
+*Midi*: {menu[days[2]]["midi"]}
+*Goûter*: {menu[days[2]]["gouter"]}
+
+{days[3].upper()}:
+*Midi*: {menu[days[3]]["midi"]}
+*Goûter*: {menu[days[3]]["gouter"]}
+
+{days[4].upper()}:
+*Midi*: {menu[days[4]]["midi"]}
+*Goûter*: {menu[days[4]]["gouter"]}
+"""
+
diff --git a/message_sender.py b/message_sender.py
new file mode 100644
index 0000000..c97feaa
--- /dev/null
+++ b/message_sender.py
@@ -0,0 +1,36 @@
+import base64
+from pathlib import Path
+
+import requests
+
+from menus import MenuMessageFormatter, Menus
+
+
+class SignalMessager:
+    def __init__(self, api_url: str, user_number: str):
+        self.api_url = api_url
+        self.user_number = user_number
+
+    @staticmethod
+    def create_headers() -> dict[str, str]:
+        return {"Content-Type": "application/json"}
+
+    @staticmethod
+    def create_attachment(pdf: Path):
+        return base64.b64encode(pdf.read_bytes())
+
+    def send_message(self, message: str, pdf_file: Path, recipients: list[str]):
+        headers = self.create_headers()
+        attachment = self.create_attachment(pdf_file)
+
+        body = {
+            "message": message,
+            "text_mode": "styled",
+            "number": self.user_number,
+            "recipients": recipients,
+            "base64_attachments": [
+                f"data:application/pdf;filename=menu.pdf;base64,{attachment.decode()}"
+            ],
+        }
+
+        requests.post(self.api_url, headers=headers, json=body)
diff --git a/pdf_downloader.py b/pdf_downloader.py
new file mode 100644
index 0000000..a9ccd72
--- /dev/null
+++ b/pdf_downloader.py
@@ -0,0 +1,18 @@
+import tempfile
+from pathlib import Path
+
+import requests
+
+
+def download(
+    url: str,
+    destination_folder: Path = Path(tempfile.mkdtemp()),
+    file_name: str = "file.pdf",
+) -> Path:
+    response = requests.get(url)
+    response.raise_for_status()
+
+    output_file = destination_folder / file_name
+    output_file.write_bytes(response.content)
+
+    return output_file
diff --git a/requirements-dev.txt b/requirements-dev.txt
new file mode 100644
index 0000000..40cd4be
--- /dev/null
+++ b/requirements-dev.txt
@@ -0,0 +1,2 @@
+-r requirements.txt
+ruff
\ No newline at end of file
diff --git a/requirements.txt b/requirements.txt
index 7bbec04..105fdb4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,3 @@
 requests~=2.32.3
-pdfminer.six~=20250506
+pdfminer.six==20250506
 python-dotenv~=1.1.0