From e74398cda112543aa6f19ed615001976ee89536f Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <valhalla@trueelena.org>
Date: Thu, 25 Mar 2021 17:33:49 +0100
Subject: New command: get-values

---
 lesana/command.py      | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++
 scripts/lesana         |  1 +
 tests/test_commands.py | 13 ++++++++++++
 3 files changed, 70 insertions(+)

diff --git a/lesana/command.py b/lesana/command.py
index 0054be7..9ff3533 100644
--- a/lesana/command.py
+++ b/lesana/command.py
@@ -321,6 +321,62 @@ class Search(Command):
                 print("{entry}".format(entry=entry,))
 
 
+class GetValues(Command):
+    """
+    List all values for one field, with entry counts.
+    """
+    arguments = [
+        (
+            ['--collection', '-c'],
+            {
+                'help': 'The collection to work on (default .)'
+            },
+        ),
+        (
+            ['--field', '-f'],
+            {
+                'help': 'Name of the field',
+                'required': True,
+            },
+        ),
+        (
+            ['--template', '-t'],
+            {
+                'help': 'Template to use when displaying results',
+            },
+        ),
+        (
+            ['query'],
+            {
+                'help': 'Xapian query to limit the count search " \
+                      + "in the collection',
+                'nargs': '*',
+                'default': '*'
+            },
+        ),
+    ]
+
+    def main(self):
+        collection = self.collection_class(self.args.collection)
+        counts = collection.get_field_values(
+            self.args.field,
+            ' '.join(self.args.query)
+        )
+        if self.args.template:
+            try:
+                template = collection.get_template(self.args.template)
+                print(template.render(counts=counts))
+            except TemplatingError as e:
+                logging.error("{}".format(e))
+                sys.exit(1)
+        else:
+            for v in counts:
+                print("{value}: {count}".format(
+                    value=v['value'],
+                    count=v['frequency']
+                ))
+
+
 class Export(Command):
     """
     Export entries to a different collection
diff --git a/scripts/lesana b/scripts/lesana
index 8e34179..a9778ab 100755
--- a/scripts/lesana
+++ b/scripts/lesana
@@ -19,6 +19,7 @@ class Lesana(lesana.command.MainCommand):
         ("show", lesana.command.Show()),
         ("index", lesana.command.Index()),
         ("search", lesana.command.Search()),
+        ("get-values", lesana.command.GetValues()),
         ("update", lesana.command.Update()),
         ("export", lesana.command.Export()),
         ("init", lesana.command.Init()),
diff --git a/tests/test_commands.py b/tests/test_commands.py
index 92b603f..99cc649 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -121,6 +121,19 @@ class testCommands(unittest.TestCase):
         )
         self.assertEqual(streams['stderr'].getvalue(), '')
 
+    def test_get_values(self):
+        args = {
+            'collection': self.tmpdir.name,
+            'git': True,
+            'template': False,
+            'query': '*',
+            'field': 'position',
+        }
+        streams = self._run_command(command.GetValues(), args)
+        print(streams['stdout'].getvalue())
+        self.assertIn('somewhere: 2', streams['stdout'].getvalue())
+        self.assertEqual(streams['stderr'].getvalue(), '')
+
     def test_export(self):
         dest_tmpdir = tempfile.TemporaryDirectory()
         utils.copytree(
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