conditional example skeleton

Author: juleswg23

examples/conditional.py

@@ -1,8 +1,63 @@
-# This feels like it's more contingent on setting up a cron job or automated
-# workflow. The logic on whether or not to send (or who to sent to, etc.) is 
-# outside of the email workflow in my eyes. So this example feel better suited for
-# a set of OS directives or other script with somewhere to have a conditional send action.
-# 
-# In the context of Quarto and Connect, if it existed in the output metadata, that seems
-# to be only because Connect expects to fire an email, so you have to actively trigger the
-# "no email" state. 
+import os
+from dotenv import load_dotenv
+import redmail
+import random
+
+import sys
+
+sys.path.insert(0, os.path.abspath(os.path.dirname(__file__) + "/.."))
+from data_polars import sp500
+
+
+load_dotenv()
+gmail_address = os.environ["GMAIL_ADDRESS"]
+gmail_app_password = os.environ["GMAIL_APP_PASSWORD"]
+
+
+email_subject = "Report on Cars"
+
+# Randomly select 10 sequential days
+num_rows = sp500.shape[0]
+if num_rows < 10:
+    raise ValueError("sp500 must have at least 10 rows")
+start_idx = random.randint(0, num_rows - 10)
+df_slice = sp500.slice(start_idx, 10).reverse()
+
+# Compare first and last closing prices
+first_close = df_slice[0, "close"]
+last_close = df_slice[-1, "close"]
+bg_color = "#fbeaea" if first_close > last_close else "#e6f4ea"  # red if first > last, green otherwise
+
+intro = """
+<div style='font-family: sans-serif; font-size: 1.05em; color: #222; margin-bottom: 1em;'>
+    <h2 style='color: #0074D9; margin-top: 0;'>Welcome to Your S&P 500 Mini Report!</h2>
+    <p>Hi there,<br><br>
+    Here's a quick look at 10 sequential days from the S&P 500. The table background color reflects whether the closing price increased (green) or decreased (red) over the period.</p>
+</div>
+"""
+salutation = """
+<div style='font-family: sans-serif; font-size: 1em; color: #444; margin-top: 2em;'>
+    <p>Thanks for reading!<br>Best regards,<br>Jules</p>
+</div>
+"""
+
+# Render table with background color
+table_html = (
+    df_slice.style
+    .tab_options(table_background_color=bg_color)
+    .as_raw_html(inline_css=True)
+)
+
+email_body = intro + table_html + salutation
+
+# This is here to emphasize the sender does not have to be the same as the receiver
+email_receiver = gmail_address
+
+redmail.gmail.username = gmail_address
+redmail.gmail.password = gmail_app_password
+
+redmail.gmail.send(
+    subject=email_subject,
+    receivers=["jules.walzergoldfeld@posit.co"],
+    html=email_body,
+)