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Generate pdf file with prices

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Module name:

Package: reportlab
Cyrillic fonts:

In this module are `GeneratePdf` class, on every init

1) We give to attribute `table` of the class a list with lists of x1,x2,y1,y2 params
this params create table borders, there are two type of borders in, and out:

+------------------------+ <- out
|| <- in ||
|| ||
|| ||

# dont change values of table manualy in __init__: it is default params
to create first table borders in left top side of pdf page
# or change it if you know what do to
example : of params
table = [
[15,785,248,785], # top horizontal line
[15,660,248,660], # bottom horizontal line
[15,785,15,660], # left horizontal line
[248,785,248,660], # right horizontal line
[18,782,245,782], # top horizontal line
[18,663,245,663], # bottom horizontal line
[18,782,18,663], # left horizontal line
[245,782,245,663] # right horizontal line

2) We give to attribute `table_info` of the class params where will be setup our
table information

Default table information are in this position, also created in
left top side of the pdf page

# coords for table info
self.table_info = {
# key : value[x1,x2]
'name': [128, 750],
'price_str': [28, 700],
'currency': [220, 700],
'firm': [19, 667],
'barcode': [128, 687],
'date_str': [152, 667],
'date': [202, 667],
'price': [215, 702],
'total': [242, 677]

### Important ### this default values are in __init__ method, they are given by default when class are init,
don't move this default values from __init__ method to simple class attributes, because we will rewrite this values in gen() method
and if this values will be in class attributes but not in __init__ method wi will take not default params, but changed params that was
changed last time.

3) init params
3.1) path_dir: where to save PDF file
3.2) product_list: a list of product objects
product_lists example:
'name': 'Dorna',
'barcode': 2345,

4) call gen() method

How it works:
we use for loop statment to go through all `product_lists`,
draw first table_info with default params and also draw first table borders ( this will be on top left side )

in for statment we check if `x` # x is the number of current product object in for statment,
if `x % 12 == 0` this mean that if `x == 12` we already create 12 tables and we need to create another
pdf page to continue our table draws, for this we execute `canvas.showPage()` method, it will create another
clear pdf page where we need to draw() another tables,

another if is `x % 6 == 0` this means that if `x == 6` we need to create a table on the top, but how we know what
table we need to draw ? on the left side or on the right side, for this in this if statment we have another
if statment, where we check if `table[0][0] == 365` that means that we already created the top right side table
and now we need to create a left one, if `table[0][0] != 365` we create a table on top left side

after this checks on each iteration we go down and draw our table borders and table info

save() it and it is all.

Total: we have 6 table on the left side and 6 on ther right side

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