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creates ranges(toc) as prezi 2.0 #2

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creates ranges(toc) as prezi 2.0 #2

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67 changes: 64 additions & 3 deletions manifests/mets.py
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Original file line number Diff line number Diff line change
@@ -1,5 +1,4 @@
#!/usr/bin/python

from lxml import etree
import json, sys, re
import urllib2
Expand Down Expand Up @@ -254,6 +253,62 @@ def create_ranges(ranges, previous_id, manifest_uri):
create_range_json(new_ranges, manifest_uri, range_id, previous_id, label)
create_ranges(new_ranges, range_id, manifest_uri)


###################
#
# changes to create a prezi 2.0 table of contents
#
def translate_range(range_dict, prefix, manifest_uri):

# assume it's a dict, and it has only one item
k = list(range_dict.keys())[0]
v = range_dict[k]
parent_range = {
'@id': '{0}/range/range-{1}.json'.format(manifest_uri, prefix),
'@type': 'sc:Range',
'label': k,
'canvases': [],
'ranges': [],
}
range_list = [parent_range]

if isinstance(v, str): # one canvas
parent_range['canvases'].append('{0}/canvas/canvas-{1}.json'.format(
manifest_uri, v))

if isinstance(v, list): # v might be list of canvases or nested ranges
for i, item in enumerate(v): # assume v it's a list of str or dicts
new_prefix = '{}-{}'.format(prefix, i)
child_range, r_list = translate_range(item, new_prefix, manifest_uri)
parent_range['ranges'].append(child_range['@id'])
range_list += r_list

# remove empty lists
if not parent_range['canvases']:
del parent_range['canvases']
if not parent_range['ranges']:
del parent_range['ranges']
return parent_range, range_list


def translate_ranges(mets_ranges, manifest_uri):
"""
returns list of iiif ranges

mets_ranges: list of one dict
manifest_uri: includes protocol://hostname:port/path_prefix
"""
parent_range, child_range = translate_range(mets_ranges[0], '0', manifest_uri)
toc = child_range[0]
# per iiif prezi 2.0, table of contents should have viewingHint
toc['viewingHint'] = 'top'
return child_range
#
# changes to create a prezi 2.0 table of contents
#
###################


def main(data, document_id, source, host, cookie=None):

# clear global variables
Expand Down Expand Up @@ -397,10 +452,16 @@ def main(data, document_id, source, host, cookie=None):
canvases.append(cvsjson)

# build table of contents using Range and Structures
create_ranges(rangeInfo, manifest_uri, manifest_uri)
###########
# change for prezi 2.0 table of contents
#create_ranges(rangeInfo, manifest_uri, manifest_uri)
iiif2_toc = translate_ranges(rangeInfo, manifest_uri)

mfjson['sequences'][0]['canvases'] = canvases
mfjson['structures'] = rangesJsonList
#mfjson['structures'] = rangesJsonList
mfjson['structures'] = iiif2_toc
# change for prezi 2.0 table of contents
###########

output = json.dumps(mfjson, indent=4, sort_keys=True)
return output
Expand Down