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refactor as an iterator class

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Johann Dreo 2017-11-26 16:34:01 +01:00
commit fcc485c8cd
1 changed files with 45 additions and 29 deletions
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74
flicksave.py
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@ -2,47 +2,63 @@ import os
import glob
import datetime
def make_flick(save_dir, name, date, ext):
# Current date with second precision (without micro-seconds).
tag = date.isoformat().split(".")[0]
flick = name + "_" + tag + ext
return os.path.join(save_dir, flick)
def last_of(us):
return us[-1]
def next_name(base, save_dir=".", delay=10):
full = os.path.expanduser(base)
head = os.path.basename(full)
name,ext = os.path.splitext(head)
class Flick:
def __init__(self, basename, save_dir=".", delay=10, stamp_sep='_', date_template="%Y-%m-%dT%H:%M:%S"):
self.base = basename
self.date_template = date_template
self.date_sep = stamp_sep
self.save_dir = save_dir
self.delay = delay
pattern = name+"_????-??-??T??:??:??"+ext
existing = glob.glob(os.path.join(save_dir,pattern))
# Make a glob search expression with the date template.
self.fields = {'Y':4,'m':2,'d':2,'H':2,'M':2,'S':2}
self.glob_template = self.date_template
for k in self.fields:
self.glob_template = self.glob_template.replace("%"+k,'?'*self.fields[k])
date_now = datetime.datetime.now()
#print(date_now)
def __iter__(self):
return self
if existing:
last = last_of(sorted(existing))
root,ext = os.path.splitext(last)
last_name = os.path.basename(root)
# As we globbed the pattern, no need for complex regexp.
last_tag = last_of(last_name.split("_"))
last_date = datetime.datetime.strptime(last_tag, "%Y-%m-%dT%H:%M:%S")
def make(self, save_dir, name, date, ext):
# Current date with second precision (without micro-seconds).
tag = date.isoformat().split(".")[0]
flick = name + self.date_sep + tag + ext
return os.path.join(save_dir, flick)
print("Last save:",last_date.isoformat())
def next(self):
full = os.path.expanduser(self.base)
head = os.path.basename(full)
name,ext = os.path.splitext(head)
assert(last_date <= date_now)
if date_now - last_date < datetime.timedelta(seconds=delay):
return make_flick(save_dir,name,last_date,ext)
pattern = name+self.date_sep+self.glob_template+ext
existing = glob.glob(os.path.join(self.save_dir,pattern))
return make_flick(save_dir,name,date_now,ext)
date_now = datetime.datetime.now()
#print(date_now)
if existing:
last = last_of(sorted(existing))
root,ext = os.path.splitext(last)
last_name = os.path.basename(root)
# As we globbed the pattern, no need for complex regexp.
last_tag = last_of(last_name.split(self.date_sep))
last_date = datetime.datetime.strptime(last_tag, self.date_template)
print("Last flick on:",last_date.isoformat())
assert(last_date <= date_now)
if date_now - last_date < datetime.timedelta(seconds=self.delay):
return self.make(self.save_dir,name,last_date,ext)
return self.make(self.save_dir,name,date_now,ext)
if __name__=="__main__":
import sys
print(next_name(sys.argv[1]))
f = Flick(sys.argv[1])
print(f.next())