Create datecount plugin

jrnl/plugins/__init__.py

@@ -3,11 +3,13 @@
 # Copyright (C) 2012-2021 jrnl contributors
 # License: https://www.gnu.org/licenses/gpl-3.0.html
 
+from jrnl.plugins.datecount_exporter import DatecountExporter
 from .fancy_exporter import FancyExporter
 from .jrnl_importer import JRNLImporter
 from .json_exporter import JSONExporter
 from .markdown_exporter import MarkdownExporter
 from .tag_exporter import TagExporter
+from .datecount_exporter import DatecountExporter
 from .template_exporter import __all__ as template_exporters
 from .text_exporter import TextExporter
 from .xml_exporter import XMLExporter
@@ -17,6 +19,7 @@ __exporters = [
     JSONExporter,
     MarkdownExporter,
     TagExporter,
+    DatecountExporter,
     TextExporter,
     XMLExporter,
     YAMLExporter,

jrnl/plugins/datecount_exporter.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python
+# encoding: utf-8
+# Copyright (C) 2012-2021 jrnl contributors
+# License: https://www.gnu.org/licenses/gpl-3.0.html
+
+from .text_exporter import TextExporter
+from .util import get_date_counts
+
+
+class DatecountExporter(TextExporter):
+    """This Exporter can lists the tags for entries and journals, exported as a plain text file."""
+
+    names = ["datecount"]
+    extension = "datecount"
+
+    @classmethod
+    def export_entry(cls, entry):
+        raise NotImplementedError
+
+    @classmethod
+    def export_journal(cls, journal):
+        """Returns dates and their frequencies for an entire journal."""
+        date_counts = get_date_counts(journal)
+        if not date_counts:
+            return "[No dates found in journal.]"
+        result = "\n".join(f"{date} {count}" for date, count in date_counts.items())
+        return result

jrnl/plugins/util.py

@@ -3,6 +3,19 @@
 # Copyright (C) 2012-2021 jrnl contributors
 # License: https://www.gnu.org/licenses/gpl-3.0.html
 
+from collections import Counter
+
+
+def get_date_counts(journal):
+    """Returns a collections.Counter object containing date counts"""
+    # Dates are normalized
+    date_counts = Counter()
+    for entry in journal.entries:
+        # entry.date.date() gets date without time
+        date = str(entry.date.date())
+        date_counts[date] += 1
+    return date_counts
+
 
 def get_tags_count(journal):
     """Returns a set of tuples (count, tag) for all tags present in the journal."""