From 7f63453859c1d58871b58cc17d407a6563175b00 Mon Sep 17 00:00:00 2001
From: Benjamin Dauvergne <bdauvergne@entrouvert.com>
Date: Wed, 14 Oct 2015 00:18:44 +0200
Subject: [PATCH 3/4] wf/export_to_model: add opendocument support (#4292)

---
 tests/template-out.odt    | Bin 0 -> 31138 bytes
 tests/template.odt        | Bin 0 -> 9817 bytes
 tests/test_form_pages.py  |  90 ++++++++++++++++++++++++++++++++++++++++++++--
 wcs/wf/export_to_model.py |  87 ++++++++++++++++++++++++++++++++++++++++----
 4 files changed, 167 insertions(+), 10 deletions(-)
 create mode 100644 tests/template-out.odt
 create mode 100644 tests/template.odt

diff --git a/tests/template-out.odt b/tests/template-out.odt
new file mode 100644
index 0000000000000000000000000000000000000000..f1f1857eb6139d79a30cad0d385a601d89923d40
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diff --git a/tests/template.odt b/tests/template.odt
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diff --git a/tests/test_form_pages.py b/tests/test_form_pages.py
index 8a50a8d..33f3025 100644
--- a/tests/test_form_pages.py
+++ b/tests/test_form_pages.py
@@ -3,6 +3,7 @@ import hashlib
 import os
 import re
 import StringIO
+import zipfile
 from webtest import Upload
 
 from quixote.http_request import Upload as QuixoteUpload
@@ -23,6 +24,15 @@ from wcs.sessions import BasicSession
 
 from utilities import get_app, login, create_temporary_pub, clean_temporary_pub, emails
 
+
+def assert_equal_zip(stream1, stream2):
+    z1 = zipfile.ZipFile(stream1)
+    z2 = zipfile.ZipFile(stream2)
+    assert set(z1.namelist()) == set(z2.namelist())
+    for name in z1.namelist():
+        assert z1.read(name) == z2.read(name), 'file "%s" differs' % name
+
+
 def pytest_generate_tests(metafunc):
     if 'pub' in metafunc.fixturenames:
         metafunc.parametrize('pub', ['pickle', 'sql'], indirect=True)
@@ -1135,7 +1145,7 @@ def test_formdata_generated_document_download(pub):
     st1 = wf.add_status('Status1', 'st1')
     export_to = ExportToModel()
     export_to.label = 'create doc'
-    upload = QuixoteUpload('/foo/test.rtf', content_type='text/rtf')
+    upload = QuixoteUpload('/foo/test.rtf', content_type='application/rtf')
     upload.fp = StringIO.StringIO()
     upload.fp.write('HELLO WORLD')
     upload.fp.seek(0)
@@ -1178,11 +1188,11 @@ def test_formdata_generated_document_download(pub):
     resp = resp.click('test.rtf')
     assert resp.location.endswith('/test.rtf')
     resp = resp.follow()
-    assert resp.content_type == 'text/rtf'
+    assert resp.content_type == 'application/rtf'
     assert resp.body == 'HELLO WORLD'
 
     # change file content, same name
-    upload = QuixoteUpload('/foo/test.rtf', content_type='text/rtf')
+    upload = QuixoteUpload('/foo/test.rtf', content_type='application/rtf')
     upload.fp = StringIO.StringIO()
     upload.fp.write('HELLO NEW WORLD')
     upload.fp.seek(0)
@@ -1197,6 +1207,80 @@ def test_formdata_generated_document_download(pub):
     assert resp.click('test.rtf', index=0).follow().body == 'HELLO WORLD'
     assert resp.click('test.rtf', index=1).follow().body == 'HELLO NEW WORLD'
 
+def test_formdata_generated_document_odt_download(pub):
+    create_user(pub)
+    wf = Workflow(name='status')
+    st1 = wf.add_status('Status1', 'st1')
+    export_to = ExportToModel()
+    export_to.label = 'create doc'
+    template_filename = os.path.join(os.path.dirname(__file__), 'template.odt')
+    template = open(template_filename).read()
+    upload = QuixoteUpload('/foo/template.odt', content_type='application/octet-stream')
+    upload.fp = StringIO.StringIO()
+    upload.fp.write(template)
+    upload.fp.seek(0)
+    export_to.model_file = UploadedFile(pub.app_dir, None, upload)
+    export_to.id = '_export_to'
+    export_to.by = ['_submitter']
+    st1.items.append(export_to)
+    export_to.parent = st1
+    wf.store()
+
+    formdef = create_formdef()
+    formdef.workflow_id = wf.id
+    formdef.fields = []
+    formdef.store()
+    formdef.data_class().wipe()
+
+    resp = login(get_app(pub), username='foo', password='foo').get('/test/')
+    resp = resp.forms[0].submit('submit')
+    assert 'Check values then click submit.' in resp.body
+    resp = resp.forms[0].submit('submit')
+    assert resp.status_int == 302
+    form_location = resp.location
+    resp = resp.follow()
+    assert 'The form has been recorded' in resp.body
+
+    resp = resp.form.submit('button_export_to')
+
+    resp = resp.follow() # $form/$id/create_doc
+    resp = resp.follow() # $form/$id/create_doc/
+    with open(os.path.join(os.path.dirname(__file__), 'template-out.odt')) as f:
+        assert_equal_zip(StringIO.StringIO(resp.body), f)
+
+    export_to.attach_to_history = True
+    wf.store()
+
+    resp = login(get_app(pub), username='foo', password='foo').get(form_location)
+    resp = resp.form.submit('button_export_to')
+    assert resp.location == form_location
+    resp = resp.follow() # back to form page
+
+    resp = resp.click('template.odt')
+    assert resp.location.endswith('/template.odt')
+    resp = resp.follow()
+    assert resp.content_type == 'application/octet-stream'
+    with open(os.path.join(os.path.dirname(__file__), 'template-out.odt')) as f:
+        assert_equal_zip(StringIO.StringIO(resp.body), f)
+
+    # change file content, same name
+    upload = QuixoteUpload('/foo/test.rtf', content_type='application/rtf')
+    upload.fp = StringIO.StringIO()
+    upload.fp.write('HELLO NEW WORLD')
+    upload.fp.seek(0)
+    export_to.model_file = UploadedFile(pub.app_dir, None, upload)
+    wf.store()
+
+    resp = login(get_app(pub), username='foo', password='foo').get(form_location)
+    resp = resp.form.submit('button_export_to')
+    assert resp.location == form_location
+    resp = resp.follow() # back to form page
+
+    with open(os.path.join(os.path.dirname(__file__), 'template-out.odt')) as f:
+        body = resp.click('template.odt', index=0).follow().body
+        assert_equal_zip(StringIO.StringIO(body), f)
+    assert resp.click('test.rtf', index=0).follow().body == 'HELLO NEW WORLD'
+
 def test_formdata_form_file_download(pub):
     create_user(pub)
     wf = Workflow(name='status')
diff --git a/wcs/wf/export_to_model.py b/wcs/wf/export_to_model.py
index 8053b2d..66bff3b 100644
--- a/wcs/wf/export_to_model.py
+++ b/wcs/wf/export_to_model.py
@@ -16,6 +16,7 @@
 
 from StringIO import StringIO
 from xml.etree import ElementTree as ET
+import zipfile
 
 from quixote import get_response, get_request, get_publisher
 from quixote.directory import Directory
@@ -33,6 +34,35 @@ from wcs.workflows import (WorkflowStatusItem, AttachmentEvolutionPart,
                            template_on_formdata, register_item_class)
 
 
+def transform_opendocument(instream, outstream, process):
+    '''Take a file-like object containing an ODT, ODS, or any open-office
+       format, parse context.xml with element tree and apply process to its root
+       node.
+    '''
+    zin = zipfile.ZipFile(instream, mode='r')
+    zout = zipfile.ZipFile(outstream, mode='w')
+    assert 'content.xml' in zin.namelist()
+    for filename in zin.namelist():
+        content = zin.read(filename)
+        if filename in ('meta.xml', 'content.xml'):
+            root = ET.fromstring(content)
+            process(root)
+            content = ET.tostring(root)
+        zout.writestr(filename, content)
+    zout.close()
+
+
+def is_opendocument(stream):
+    try:
+        with zipfile.ZipFile(stream) as z:
+            if 'mimetype' in z.namelist():
+                return z.read('mimetype').startswith('application/vnd.oasis.opendocument.')
+    except zipfile.BadZipfile:
+        return False
+    finally:
+        stream.seek(0)
+
+
 class TemplatingError(PublishError):
     def __init__(self, description):
         self.title = _('Templating Error')
@@ -151,17 +181,31 @@ class ExportToModel(WorkflowStatusItem):
             return base_url + self.get_directory_name()
 
     def model_file_validation(self, upload):
+        if hasattr(upload, 'fp'):
+            fp = upload.fp
+        elif hasattr(upload, 'get_file'):
+            fp = upload.get_file()
+        else:
+            raise Exception('unknown upload %r' % upload)
         if upload.content_type and upload.content_type == 'application/rtf':
-            return True, ''
+            return 'rtf', ''
         if (upload.content_type and upload.content_type == 'application/octet-stream') or \
                 upload.content_type is None:
             if upload.base_filename and upload.base_filename.endswith('.rtf'):
-                return True, ''
-        upload.fp.seek(0)
-        if upload.read(10).startswith('{\\rtf'):
-            upload.fp.seek(0)
-            return True, ''
-        return False, _('Only RTF files can be used')
+                return 'rtf', ''
+        if fp.read(10).startswith('{\\rtf'):
+            fp.seek(0)
+            return 'rtf', ''
+        fp.seek(0)
+        if upload.content_type and upload.content_type.startswith('application/vnd.oasis.opendocument.'):
+            return 'opendocument', ''
+        if (upload.content_type and upload.content_type == 'application/octet-stream') or \
+                upload.content_type is None:
+            if upload.base_filename and upload.base_filename.rsplit('.', 1) in ('odt', 'ods', 'odc', 'odb'):
+                return 'opendocument', ''
+        if is_opendocument(fp):
+            return 'opendocument', ''
+        return False, _('Only RTF and OpenDocument files can be used')
 
     def add_parameters_widgets(self, form, parameters, prefix='',
                                formdef=None):
@@ -222,6 +266,16 @@ class ExportToModel(WorkflowStatusItem):
     directory_name = property(get_directory_name)
 
     def apply_template_to_formdata(self, formdata):
+        assert self.model_file
+        kind, msg = self.model_file_validation(self.model_file)
+        if kind == 'rtf':
+            return self.apply_rtf_template_to_formdata(formdata)
+        elif kind == 'opendocument':
+            return self.apply_od_template_to_formdata(formdata)
+        else:
+            raise Exception('unsupported model kind %r' % kind)
+
+    def apply_rtf_template_to_formdata(self, formdata):
         process = None
         if self.model_file.base_filename.endswith('.rtf'):
             process = rtf_process
@@ -242,6 +296,25 @@ class ExportToModel(WorkflowStatusItem):
             raise TemplatingError(_('Unknown error in the '
                                     'template: %s') % str(e))
 
+
+    def apply_od_template_to_formdata(self, formdata):
+        def process_root(root):
+            def process_text(t):
+                if isinstance(t, unicode):
+                    t = t.encode(get_publisher().site_charset)
+                t = template_on_formdata(formdata, t)
+                return unicode(t, get_publisher().site_charset)
+            for node in root.iter():
+                if node.text:
+                    node.text = process_text(node.text)
+                if node.tail:
+                    node.tail = process_text(node.tail)
+        outstream = StringIO()
+        transform_opendocument(self.model_file.get_file(), outstream,
+                               process_root)
+        return outstream.getvalue()
+
+
     def get_parameters(self):
         return ('by', 'label', 'model_file', 'attach_to_history',
                 'backoffice_info_text')
-- 
2.1.4