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Base64 encode the image for the email attachment(s). #153

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Merged
MBARIMike merged 1 commit into from
Apr 13, 2026
Merged

Base64 encode the image for the email attachment(s). #153

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16 changes: 13 additions & 3 deletions src/data/lrauv_deployment_plots.py
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Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,7 @@
__copyright__ = "Copyright 2026, Monterey Bay Aquarium Research Institute"

import argparse # noqa: I001
import base64
import http
import logging
import os
Expand Down Expand Up @@ -364,6 +365,7 @@ def _build_and_write_html( # noqa: PLR0913
stoqs_url,
nc_files,
auv_name=dlist.split("/")[0],
png_file_path=Path(png_path),
)
self.logger.info("Per-PNG HTML written to %s", per_png_html)
archiver = Archiver(add_handlers=True, clobber=True)
Expand Down Expand Up @@ -564,11 +566,13 @@ def _write_per_png_html( # noqa: C901, PLR0913
stoqs_url: str | None,
nc_files: list[str],
auv_name: str = "",
png_file_path: Path | None = None,
) -> None:
"""Write a plain HTML page for one deployment PNG.

Embeds the full-size PNG (via fully-qualified *png_url*), links to the
STOQS database, then lists per-log image / data / STOQS links — no CSS.
Embeds the full-size PNG as a base64 data URI when *png_file_path* is
supplied (so the image works in email clients that block external URLs).
Falls back to the fully-qualified *png_url* otherwise.
"""
# Group nc_files by log directory (second-to-last path component)
grouped: dict[str, list[str]] = {}
Expand Down Expand Up @@ -608,6 +612,12 @@ def _write_per_png_html( # noqa: C901, PLR0913
db_label = after_scheme.split("/")[1] if "/" in after_scheme else after_scheme
stoqs_line = f'<p><a href="{stoqs_url}">View these data in {db_label}</a></p>\n'

if png_file_path is not None and png_file_path.exists():
b64 = base64.b64encode(png_file_path.read_bytes()).decode("ascii")
img_src = f"data:image/png;base64,{b64}"
else:
img_src = png_url

html_title_single = title.replace("\n", " \u2014 ")
script_github_url = get_script_github_url("src/data/lrauv_deployment_plots.py")
created_ts = datetime.now(tz=UTC).strftime("%Y-%m-%d %H:%M:%S UTC")
Expand All @@ -626,7 +636,7 @@ def _write_per_png_html( # noqa: C901, PLR0913
"</head>\n"
"<body>\n"
f" <h1>{html_title_single}</h1>\n"
f' <img src="{png_url}" alt="{png_name}">\n'
f' <img src="{img_src}" alt="{png_name}">\n'
f" {stoqs_line}"
" <h2>Log files</h2>\n"
" <ul>\n"
Expand Down
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