def create_qrcode_record(self, author_id, content, eclevel, qrtypenumber,\
filename, alttag, titletag, creation_date):
# write a record to the QRCode table, returns record id
lid("start of create_qrcode_record")
con = sqlite.connect(settings.DB_FILE_PATH)
c = con.cursor()
c.execute("INSERT INTO QRCode VALUES (NULL,?,?,?,?,?,?,?,?)",(author_id, content, eclevel, qrtypenumber, filename, alttag, titletag,creation_date))
new_id = c.lastrowid
con.commit()
c.close()
return new_id
def create_qrcode(self, content, alttag, titletag, img_types=settings.QR_IMG_TYPES):
# determine the name of the QRCode file
lid("creating qrcode ...")
# HACK, just calling it something random [TODO] refactor
name = toolbox.random_identifier()
# first make the file(s)
def qrcode_files(qr_img_types):
for t in qr_img_types:
qrcode_filename, full_file_path = self.create_qrcode_file(content, t, name)
yield qrcode_filename, full_file_path
lid("before making qrcode_fullpaths")
qrcode_fullpaths = [y for x,y in qrcode_files(settings.QR_IMG_TYPES)]
lid("de qrcode full_paths:", qrcode_fullpaths)
# then make the qrcode record
qr_id = self.create_qrcode_record(self.author_id, content, self.eclevel, self.qrtypenumber, qrcode_fullpaths[0], alttag, titletag, datetime.datetime.now())
return qr_id, name
def create_qrcode_file(self, text, img_type, name):
# write qr code to filesystem
lid("create_qrcode_file start")
if img_type not in settings.QR_IMG_TYPES:
raise ImageTypeException("can't generate QR Code, not a valid image type (determined by extension) " + settings.QR_IMG_TYPES)
if not toolbox.string_has_content(text):
raise ValueError("can't generate QR Code without proper string content")
# determine the qrcode type based on amount of content to load
lid("looks like the image type check out ...")
content_length = len(text)
# [TODO] optimize best version determination, the best_fit method (called by default) of the QRCode lib is based on cathing DataOverflowErrors, determining version should be declarative lookup based
qr = qrcode.QRCode(self.qrtypenumber, self.eclevel)
qr.add_data(text)
qr.make()
im = qr.make_image()
qrcode_filename = name+img_type
full_file_path = os.path.join(settings.QR_FS_ROOT, qrcode_filename)
im.save(full_file_path)
lid("wrote file to filesystem: %s" % full_file_path)
return qrcode_filename, full_file_path
def __init__(self, path=settings.QR_FS_ROOT, author_id=0, eclevel=qrcode.ERROR_CORRECT_L, qrtypenumber=settings.DEFAULT_QRTYPENUMBER):
self.path = path
self.eclevel = int(eclevel)
self.author_id = author_id
self.qrtypenumber = qrtypenumber # [TODO] factor this member out, type or version are determined by the length of the content
lid("QRCodeMaker object created")
