| 1 |
86
|
aaronmk
|
# XML "function" nodes that evaluate their contents to text
|
| 2 |
|
|
|
| 3 |
111
|
aaronmk
|
import datetime
|
| 4 |
|
|
|
| 5 |
818
|
aaronmk
|
import dates
|
| 6 |
300
|
aaronmk
|
import exc
|
| 7 |
86
|
aaronmk
|
import xml_dom
|
| 8 |
|
|
|
| 9 |
789
|
aaronmk
|
class SyntaxException(exc.ExceptionWithCause):
|
| 10 |
797
|
aaronmk
|
def __init__(self, cause):
|
| 11 |
|
|
exc.ExceptionWithCause.__init__(self, 'Invalid XML function syntax',
|
| 12 |
|
|
cause)
|
| 13 |
278
|
aaronmk
|
|
| 14 |
86
|
aaronmk
|
def map_items(func, items):
|
| 15 |
|
|
return [(name, func(value)) for name, value in items]
|
| 16 |
|
|
|
| 17 |
278
|
aaronmk
|
def conv_items(type_, items):
|
| 18 |
787
|
aaronmk
|
def conv(val):
|
| 19 |
|
|
try: return type_(val)
|
| 20 |
|
|
except ValueError, e: raise SyntaxException(e)
|
| 21 |
793
|
aaronmk
|
return map_items(conv, xml_dom.TextEntryOnlyIter(items))
|
| 22 |
278
|
aaronmk
|
|
| 23 |
113
|
aaronmk
|
def alt(items):
|
| 24 |
|
|
items = list(items)
|
| 25 |
|
|
items.sort()
|
| 26 |
|
|
return items[0][1] # value of lowest-numbered item
|
| 27 |
|
|
|
| 28 |
86
|
aaronmk
|
def range_(items):
|
| 29 |
278
|
aaronmk
|
items = dict(conv_items(float, items))
|
| 30 |
326
|
aaronmk
|
try:
|
| 31 |
|
|
to = items['to']
|
| 32 |
|
|
from_ = items['from']
|
| 33 |
|
|
except KeyError, e: raise SyntaxException(e)
|
| 34 |
|
|
return str(to - from_)
|
| 35 |
86
|
aaronmk
|
|
| 36 |
|
|
def avg(items):
|
| 37 |
|
|
count = 0
|
| 38 |
|
|
sum_ = 0.
|
| 39 |
278
|
aaronmk
|
for name, value in conv_items(float, items):
|
| 40 |
86
|
aaronmk
|
count += 1
|
| 41 |
|
|
sum_ += value
|
| 42 |
|
|
return str(sum_/count)
|
| 43 |
|
|
|
| 44 |
|
|
def date(items):
|
| 45 |
794
|
aaronmk
|
items = conv_items(str, items) # Get items *once* from iter and check types
|
| 46 |
786
|
aaronmk
|
try: str_ = dict(items)['date']
|
| 47 |
|
|
except KeyError:
|
| 48 |
|
|
items = dict(filter(lambda (k, v): v != 0, conv_items(int, items)))
|
| 49 |
|
|
items.setdefault('year', 1900)
|
| 50 |
|
|
items.setdefault('month', 1)
|
| 51 |
|
|
items.setdefault('day', 1)
|
| 52 |
|
|
try: date = datetime.date(**items)
|
| 53 |
|
|
except ValueError, e: raise SyntaxException(e)
|
| 54 |
|
|
else:
|
| 55 |
324
|
aaronmk
|
try: year = float(str_)
|
| 56 |
|
|
except ValueError:
|
| 57 |
|
|
try: import dateutil.parser
|
| 58 |
|
|
except ImportError: return str_
|
| 59 |
|
|
try: date = dateutil.parser.parse(str_)
|
| 60 |
|
|
except ValueError, e: raise SyntaxException(e)
|
| 61 |
|
|
else: date = (datetime.date(int(year), 1, 1) +
|
| 62 |
|
|
datetime.timedelta(round((year % 1.)*365)))
|
| 63 |
818
|
aaronmk
|
try: return dates.strftime('%Y-%m-%d', date)
|
| 64 |
721
|
aaronmk
|
except ValueError, e: raise SyntaxException(e)
|
| 65 |
86
|
aaronmk
|
|
| 66 |
328
|
aaronmk
|
_name_parts_slices_items = [
|
| 67 |
|
|
('first', slice(None, 1)),
|
| 68 |
|
|
('middle', slice(1, -1)),
|
| 69 |
|
|
('last', slice(-1, None)),
|
| 70 |
|
|
]
|
| 71 |
|
|
name_parts_slices = dict(_name_parts_slices_items)
|
| 72 |
|
|
name_parts = [name for name, slice_ in _name_parts_slices_items]
|
| 73 |
|
|
|
| 74 |
89
|
aaronmk
|
def name(items):
|
| 75 |
|
|
items = dict(items)
|
| 76 |
102
|
aaronmk
|
parts = []
|
| 77 |
328
|
aaronmk
|
for part in name_parts:
|
| 78 |
|
|
if part in items: parts.append(items[part])
|
| 79 |
102
|
aaronmk
|
return ' '.join(parts)
|
| 80 |
|
|
|
| 81 |
328
|
aaronmk
|
def name_part(items):
|
| 82 |
|
|
out_items = []
|
| 83 |
|
|
for part, value in items:
|
| 84 |
|
|
try: slice_ = name_parts_slices[part]
|
| 85 |
|
|
except KeyError, e: raise SyntaxException(e)
|
| 86 |
|
|
else: out_items.append((part, ' '.join(value.split(' ')[slice_])))
|
| 87 |
|
|
return name(out_items)
|
| 88 |
|
|
|
| 89 |
86
|
aaronmk
|
# Function names must start with _ to avoid collisions with real tags
|
| 90 |
144
|
aaronmk
|
# Functions take arguments (items)
|
| 91 |
113
|
aaronmk
|
funcs = {'_alt': alt, '_range': range_, '_avg': avg, '_date': date,
|
| 92 |
328
|
aaronmk
|
'_name': name, '_namePart': name_part}
|
| 93 |
86
|
aaronmk
|
|
| 94 |
447
|
aaronmk
|
def process(node, on_error=exc.raise_):
|
| 95 |
457
|
aaronmk
|
for child in xml_dom.NodeElemIter(node): process(child, on_error)
|
| 96 |
139
|
aaronmk
|
name = node.tagName
|
| 97 |
280
|
aaronmk
|
if name.startswith('_') and name in funcs:
|
| 98 |
|
|
try: value = funcs[name](xml_dom.NodeTextEntryIter(node))
|
| 99 |
288
|
aaronmk
|
except SyntaxException, e:
|
| 100 |
448
|
aaronmk
|
str_ = str(node)
|
| 101 |
|
|
exc.add_msg(e, 'function:\n'+str_)
|
| 102 |
|
|
xml_dom.replace(node, node.ownerDocument.createComment('\n'+str_))
|
| 103 |
447
|
aaronmk
|
on_error(e)
|
| 104 |
280
|
aaronmk
|
else: xml_dom.replace_with_text(node, value)
|
