From 4c291a3710486eab6edd97b5e0619241f5909173 Mon Sep 17 00:00:00 2001
From: Elena ``of Valhalla'' Grandi <valhalla@trueelena.org>
Date: Fri, 13 Sep 2019 14:28:38 +0200
Subject: New command to export data from a lesana collection to another one.

---
 lesana/command.py | 46 ++++++++++++++++++++++++++++++++++++++++++++++
 scripts/lesana    | 17 +++++++++--------
 2 files changed, 55 insertions(+), 8 deletions(-)

diff --git a/lesana/command.py b/lesana/command.py
index 6fb0f5f..15be857 100644
--- a/lesana/command.py
+++ b/lesana/command.py
@@ -3,6 +3,8 @@ import os
 import subprocess
 import sys
 
+import ruamel.yaml
+
 from . import Collection, Entry, TemplatingError
 
 
@@ -246,6 +248,50 @@ class Search(Command):
                     ))
 
 
+class Export(Command):
+    arguments = [
+        (['--collection', '-c'], dict(
+            help='The collection to work on (default .)'
+            )),
+        (['--query', '-q'], dict(
+            help='Xapian query to search in the collection',
+            )),
+        (['destination'], dict(
+            help='The collection to export entries to'
+            )),
+        (['template'], dict(
+            help='Template to convert entries',
+            )),
+        ]
+
+    def main(self):
+        collection = Collection(self.args.collection)
+        destination = Collection(self.args.destination)
+        if not self.args.query:
+            results = collection.get_all_documents()
+        else:
+            collection.start_search(' '.join(self.args.query))
+            results = collection.get_all_search_results()
+        for entry in results:
+            try:
+                template = collection.get_template(self.args.template)
+                rendered = template.render(entry=entry)
+                data = ruamel.yaml.load(
+                    template.render(entry=entry),
+                    ruamel.yaml.RoundTripLoader
+                    )
+            except TemplatingError as e:
+                logging.error("{}".format(e))
+                sys.exit(1)
+            try:
+                data = ruamel.yaml.load(rendered, ruamel.yaml.RoundTripLoader)
+            except ruamel.yaml.YAMLError as e:
+                logging.error("{}".format(e))
+                sys.exit(1)
+            e = Entry(destination, data=data)
+            destination.save_entries([e])
+
+
 class Init(Command):
     arguments = [
         (['--collection', '-c'], dict(
diff --git a/scripts/lesana b/scripts/lesana
index b8b9929..408aa2c 100755
--- a/scripts/lesana
+++ b/scripts/lesana
@@ -2,7 +2,7 @@
 
 import argparse
 
-from lesana.command import New, Edit, Show, Index, Search, Init, Remove
+import lesana.command
 
 class Lesana():
     """
@@ -10,13 +10,14 @@ class Lesana():
     """
 
     commands = (
-        ('new', New()),
-        ('edit', Edit()),
-        ('show', Show()),
-        ('index', Index()),
-        ('search', Search()),
-        ('init', Init()),
-        ('rm', Remove()),
+        ('new', lesana.command.New()),
+        ('edit', lesana.command.Edit()),
+        ('show', lesana.command.Show()),
+        ('index', lesana.command.Index()),
+        ('search', lesana.command.Search()),
+        ('export', lesana.command.Export()),
+        ('init', lesana.command.Init()),
+        ('rm', lesana.command.Remove()),
         )
 
     def _main(self):
-- 
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