feat: write to quarto(connect)-usable metadata

docs/_quarto.yml

@@ -48,6 +48,7 @@ quartodoc:
         - name: Email.write_preview_email
         - name: Email.write_email_message
         - name: Email.preview_send_email
+        - name: Email.write_quarto_json
     - title: Uploading emails
       desc: >
         Converting emails to Emails,

nbmail/ingress.py

@@ -69,7 +69,9 @@ def mjml_to_email(
         mjml_markup = processed_mjml._to_mjml()
     else:
         # String-based MJML, no preprocessing needed
-        warnings.warn("MJMLTag not detected; treating input as plaintext MJML markup", UserWarning)
+        warnings.warn(
+            "MJMLTag not detected; treating input as plaintext MJML markup", UserWarning
+        )
         mjml_markup = mjml_content
         inline_attachments = {}
 
@@ -78,8 +80,8 @@ def mjml_to_email(
     i_email = Email(
         html=email_content,
         subject="",
-        rsc_email_supress_report_attachment=False,
-        rsc_email_supress_scheduled=False,
+        email_suppress_report_attachment=False,
+        email_suppress_scheduled=False,
         inline_attachments=inline_attachments,
     )
 
@@ -173,33 +175,45 @@ def quarto_json_to_email(path: str) -> Email:
     with open(path, "r", encoding="utf-8") as f:
         metadata = json.load(f)
 
-    email_html = metadata.get("rsc_email_body_html", "")
-    email_subject = metadata.get("rsc_email_subject", "")
-    email_text = metadata.get("rsc_email_body_text", "")
-
-
+    # Support both rsc_-prefixed (Quarto standard) and non-prefixed formats
+    email_html = metadata.get("rsc_email_body_html", metadata.get("email_body_html", ""))
+    email_subject = metadata.get("rsc_email_subject", metadata.get("email_subject", ""))
+    email_text = metadata.get("rsc_email_body_text", metadata.get("email_body_text", ""))
 
     # This is a list of paths that connect dumps attached files into.
     # Should be in same output directory
     output_files = metadata.get("rsc_output_files", [])
-    output_files += metadata.get("rsc_email_attachments", [])
+    output_files += metadata.get("rsc_email_attachments", metadata.get("email_attachments", []))
 
     # Get email images (dictionary: {filename: base64_string})
-    email_images = metadata.get("rsc_email_images", {})
-
-    supress_report_attachment = metadata.get(
-        "rsc_email_supress_report_attachment", False
+    email_images = metadata.get("rsc_email_images", metadata.get("email_images", {}))
+
+    # Support both old (suppress) and new (suppress) spellings, with both prefixes
+    suppress_report_attachment = metadata.get(
+        "rsc_email_suppress_report_attachment",
+        metadata.get(
+            "rsc_email_suppress_report_attachment",
+            metadata.get("email_suppress_report_attachment", 
+                        metadata.get("email_suppress_report_attachment", False))
+        )
+    )
+    suppress_scheduled = metadata.get(
+        "rsc_email_suppress_scheduled",
+        metadata.get(
+            "rsc_email_suppress_scheduled",
+            metadata.get("email_suppress_scheduled",
+                        metadata.get("email_suppress_scheduled", False))
+        )
     )
-    supress_scheduled = metadata.get("rsc_email_supress_scheduled", False)
 
     i_email = Email(
         html=email_html,
         text=email_text,
         inline_attachments=email_images,
         external_attachments=output_files,
         subject=email_subject,
-        rsc_email_supress_report_attachment=supress_report_attachment,
-        rsc_email_supress_scheduled=supress_scheduled,
+        email_suppress_report_attachment=suppress_report_attachment,
+        email_suppress_scheduled=suppress_scheduled,
     )
 
     return i_email

nbmail/structs.py

@@ -1,6 +1,7 @@
 from __future__ import annotations
 from dataclasses import dataclass, field
 import re
+import json
 
 from email.message import EmailMessage
 
@@ -38,10 +39,10 @@ class Email:
     recipients
         Optional list of recipient email addresses.
 
-    rsc_email_supress_report_attachment
+    email_suppress_report_attachment
         Whether to suppress report attachments (used in some workflows).
 
-    rsc_email_supress_scheduled
+    email_suppress_scheduled
         Whether to suppress scheduled sending (used in some workflows).
 
     Examples
@@ -58,8 +59,8 @@ class Email:
 
     html: str
     subject: str
-    rsc_email_supress_report_attachment: bool | None = None
-    rsc_email_supress_scheduled: bool | None = None
+    email_suppress_report_attachment: bool | None = None
+    email_suppress_scheduled: bool | None = None
 
     # is a list of files in path from current directory
     external_attachments: list[str] = field(default_factory=list)
@@ -224,3 +225,69 @@ def preview_send_email(self):
         ```
         """
         raise NotImplementedError
+
+    def write_quarto_json(self, out_file: str = ".output_metadata.json") -> None:
+        """
+        Write the Email to Quarto's output metadata JSON format.
+
+        This method serializes the Email object to JSON in the format expected by Quarto,
+        making it compatible with Quarto's email integration workflows. This is the inverse
+        of the `quarto_json_to_email()` ingress function.
+
+        Parameters
+        ----------
+        out_file
+            The file path to write the Quarto metadata JSON. Defaults to ".output_metadata.json".
+
+        Returns
+        -------
+        None
+
+        Examples
+        --------
+        ```python
+        email = Email(
+            html="<p>Hello world</p>",
+            subject="Test Email",
+        )
+        email.write_quarto_json("email_metadata.json")
+        ```
+
+        Notes
+        ------
+        The output JSON includes:\n
+        - email_subject: The subject line
+        - email_attachments: List of attachment file paths
+        - email_body_html: The HTML content of the email
+        - email_body_text: Plain text version (if present)
+        - email_images: Dictionary of base64-encoded inline images (only if not empty)
+        - email_suppress_report_attachment: Suppression flag for report attachments
+        - email_suppress_scheduled: Suppression flag for scheduled sending
+        """
+        metadata = {
+            "email_subject": self.subject,
+            "email_attachments": self.external_attachments or [],
+            "email_body_html": self.html,
+        }
+
+        # Add optional text field if present
+        if self.text:
+            metadata["email_body_text"] = self.text
+
+        # Add inline images only if not empty
+        if self.inline_attachments:
+            metadata["email_images"] = self.inline_attachments
+
+        # Add suppression flags if they are set (not None)
+        if self.email_suppress_report_attachment is not None:
+            metadata["email_suppress_report_attachment"] = (
+                self.email_suppress_report_attachment
+            )
+
+        if self.email_suppress_scheduled is not None:
+            metadata["email_suppress_scheduled"] = self.email_suppress_scheduled
+
+        with open(out_file, "w", encoding="utf-8") as f:
+            json.dump(metadata, f, indent=2)
+
+

nbmail/tests/test_egress.py

@@ -2,6 +2,10 @@
 
 
 import pytest
+import json
+import tempfile
+import os
+
 from nbmail.egress import (
     send_email_with_redmail,
     send_email_with_yagmail,
@@ -11,6 +15,7 @@
     send_quarto_email_with_gmail,
 )
 from nbmail.structs import Email
+from nbmail.ingress import quarto_json_to_email
 
 
 def make_basic_email():
@@ -286,3 +291,142 @@ def test_not_implemented_functions(send_func):
     email = make_basic_email()
     with pytest.raises(NotImplementedError):
         send_func(email)
+
+
+# Tests for Email.write_quarto_json() method
+def test_email_write_quarto_json_basic():
+    email = Email(
+        html="<html><body><p>Test email</p></body></html>",
+        subject="Test Subject",
+        text="Plain text version",
+        external_attachments=["file1.pdf", "file2.csv"],
+        inline_attachments={"img1": "base64data123"},
+        email_suppress_report_attachment=True,
+        email_suppress_scheduled=False,
+    )
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        json_path = os.path.join(tmpdir, "test.json")
+        email.write_quarto_json(json_path)
+
+        with open(json_path, "r") as f:
+            data = json.load(f)
+
+        # Check that all expected fields are present (with  prefix for Quarto compatibility)
+        assert data["email_subject"] == "Test Subject"
+        assert data["email_body_html"] == "<html><body><p>Test email</p></body></html>"
+        assert data["email_body_text"] == "Plain text version"
+        assert data["email_attachments"] == ["file1.pdf", "file2.csv"]
+        assert data["email_images"] == {"img1": "base64data123"}
+        assert data["email_suppress_report_attachment"] is True
+        assert data["email_suppress_scheduled"] is False
+
+
+def test_email_write_quarto_json_minimal():
+    """Test writing a minimal email to Quarto JSON format."""
+    email = Email(
+        html="<html><body>Minimal</body></html>",
+        subject="Minimal Subject",
+    )
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        json_path = os.path.join(tmpdir, "minimal.json")
+        email.write_quarto_json(json_path)
+
+        with open(json_path, "r") as f:
+            data = json.load(f)
+
+        # Check minimal fields
+        assert data["email_subject"] == "Minimal Subject"
+        assert data["email_body_html"] == "<html><body>Minimal</body></html>"
+        assert data["email_attachments"] == []
+
+        # Optional fields should not be present
+        assert "email_body_text" not in data
+        assert "email_images" not in data
+        assert "email_suppress_report_attachment" not in data
+        assert "email_suppress_scheduled" not in data
+
+
+def test_email_write_quarto_json_round_trip():
+    """Test writing and reading back a Quarto JSON email."""
+    original_email = Email(
+        html="<html><body><p>Quarto email</p></body></html>",
+        subject="Quarto Test",
+        text="Plain text version",
+        external_attachments=["output.pdf"],
+        inline_attachments={"img1": "base64encodedstring"},
+        email_suppress_report_attachment=True,
+        email_suppress_scheduled=False,
+    )
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        json_path = os.path.join(tmpdir, "roundtrip.json")
+        original_email.write_quarto_json(json_path)
+
+        # Read it back
+        read_email = quarto_json_to_email(json_path)
+
+        # Verify all fields match
+        assert read_email.subject == original_email.subject
+        assert read_email.html == original_email.html
+        assert read_email.text == original_email.text
+        assert read_email.external_attachments == original_email.external_attachments
+        assert read_email.inline_attachments == original_email.inline_attachments
+        assert read_email.email_suppress_report_attachment == original_email.email_suppress_report_attachment
+        assert read_email.email_suppress_scheduled == original_email.email_suppress_scheduled
+
+
+def test_email_write_quarto_json_no_attachments():
+    """Test writing an email without attachments or images."""
+    email = Email(
+        html="<html><body>No attachments</body></html>",
+        subject="No Attachments",
+    )
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        json_path = os.path.join(tmpdir, "no_attachments.json")
+        email.write_quarto_json(json_path)
+
+        with open(json_path, "r") as f:
+            data = json.load(f)
+
+        # Check that attachments and images are empty
+        assert data["email_attachments"] == []
+        assert "email_images" not in data
+
+
+def test_email_write_quarto_json_no_text():
+    """Test writing an email without plain text version."""
+    email = Email(
+        html="<html><body>HTML only</body></html>",
+        subject="HTML Only",
+    )
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        json_path = os.path.join(tmpdir, "html_only.json")
+        email.write_quarto_json(json_path)
+
+        with open(json_path, "r") as f:
+            data = json.load(f)
+
+        # Plain text should not be present
+        assert "email_body_text" not in data
+
+
+def test_email_write_quarto_json_custom_filename():
+    email = Email(
+        html="<html><body>Custom</body></html>",
+        subject="Custom Filename",
+    )
+
+    with tempfile.TemporaryDirectory() as tmpdir:
+        custom_path = os.path.join(tmpdir, "my_custom_file.json")
+        email.write_quarto_json(custom_path)
+
+        assert os.path.exists(custom_path)
+
+        with open(custom_path, "r") as f:
+            data = json.load(f)
+
+        assert data["email_subject"] == "Custom Filename"

nbmail/tests/test_ingress.py

@@ -225,8 +225,8 @@ def test_quarto_json_to_email_basic(tmp_path):
         "rsc_output_files": ["output.pdf"],
         "rsc_email_attachments": ["attachment.csv"],
         "rsc_email_images": {"img1": "base64encodedstring"},
-        "rsc_email_supress_report_attachment": True,
-        "rsc_email_supress_scheduled": False,
+        "rsc_email_suppress_report_attachment": True,
+        "rsc_email_suppress_scheduled": False,
     }
 
     json_file = tmp_path / "metadata.json"
@@ -240,8 +240,8 @@ def test_quarto_json_to_email_basic(tmp_path):
     assert result.text == "Plain text version"
     assert result.external_attachments == ["output.pdf", "attachment.csv"]
     assert result.inline_attachments == {"img1": "base64encodedstring"}
-    assert result.rsc_email_supress_report_attachment is True
-    assert result.rsc_email_supress_scheduled is False
+    assert result.email_suppress_report_attachment is True
+    assert result.email_suppress_scheduled is False
 
 
 def test_quarto_json_to_email_minimal(tmp_path):
@@ -261,8 +261,8 @@ def test_quarto_json_to_email_minimal(tmp_path):
     assert result.text == ""
     assert result.external_attachments == []
     assert result.inline_attachments == {}
-    assert result.rsc_email_supress_report_attachment is False
-    assert result.rsc_email_supress_scheduled is False
+    assert result.email_suppress_report_attachment is False
+    assert result.email_suppress_scheduled is False
 
 
 def test_quarto_json_to_email_empty_lists(tmp_path):

nbmail/tests/test_structs.py

@@ -37,8 +37,8 @@ def test_subject_inserts_after_body(tmp_path):
     email = Email(
         html=html,
         subject="Test Subject",
-        rsc_email_supress_report_attachment=False,
-        rsc_email_supress_scheduled=False,
+        email_suppress_report_attachment=False,
+        email_suppress_scheduled=False,
     )
     out_file = tmp_path / "preview.html"