def initialize_dictionaries(service):
'''
Initialize id_name_parents and name_id dictionaries
These two dictionaries are data in memory that helps traveser the path
of any given file/directory. The in-memory data increases efficiency, especially
when a lot of commands are processed,
requiring to find IDs of a lot of files/directores
'''
root=service.files().get(fileId='root').execute()
name_id[root['title']]=[root['id']]
id_name_parents[root['id']]=idR(root['id'],"My Drive",None)
results=service.files().list(q="trashed=false",
spaces='drive',
fields='items(id,title,parents,mimeType)').execute()
items=results.get('items',[])
if not items:
print ('No files exist in your drive')
else:
for item in items:
fileID=item['id']
fileName=item['title']
if not (name_id.has_key(fileName)):
name_id[fileName]=[fileID]
else:
name_id[fileName].append(fileID)
parent_list=item['parents']
fileParents=[]
for parent in parent_list:
fileParents.append(parent['id'])
id_name_parents[fileID]=idR(fileID,fileName,fileParents)
def add_id_name_parents(fileID,name,parent):
'''
@param: fileID: file id of the file to be added into id_name_parents dictionary
name: name of the file to be added
parent: id (string) of the parent directory of the file in Google Drive
@return: add an entry to the id_name_parents dictionary.
This function is called when a file is uploaded into Google Drive
'''
if not (fileID in id_name_parents):
id_name_parents[fileID]=idR(fileID,name,[parent])
else:
id_name_parents[fileID].add_parent(parent)