--

-- PostgreSQL database dump

--

SET statement_timeout = 0;

SET client_encoding = 'UTF8';

SET standard_conforming_strings = off;

SET check_function_bodies = false;

SET client_min_messages = warning;

SET escape_string_warning = off;

--

CREATE SCHEMA py_functions;

--

CREATE FUNCTION "__dateRangeEnd"() RETURNS trigger

    LANGUAGE plpgsql IMMUTABLE

    AS $$

BEGIN

    new.result := py_functions."_dateRangeEnd"(new.value);

    RETURN new;

END;

$$;

-- Name: __dateRangeStart(); Type: FUNCTION; Schema: py_functions; Owner: bien

--

CREATE FUNCTION "__dateRangeStart"() RETURNS trigger

    LANGUAGE plpgsql IMMUTABLE

    AS $$

BEGIN

    new.result := py_functions."_dateRangeStart"(new.value);

    RETURN new;

END;

$$;

-- Name: __namePart(); Type: FUNCTION; Schema: py_functions; Owner: bien

--

CREATE FUNCTION "__namePart"() RETURNS trigger

    LANGUAGE plpgsql IMMUTABLE

    AS $$

BEGIN

    new.result := py_functions."_namePart"(new.first, new.middle, new.last);

    RETURN new;

END;

$$;

    AS $$

global date, year, month, day

import datetime

import dateutil.tz

def e_str(e):

    msg = e.__class__.__name__+': '+e.args[0]

    return msg.rstrip()

class ExceptionWithCause(Exception):

    def __init__(self, msg, cause):

        msg += ': '+e_str(cause)

        Exception.__init__(self, msg)

utc = dateutil.tz.tzutc()

def naive2utc(datetime_):

    assert datetime_.tzinfo == None

    return datetime_.replace(tzinfo=utc)

def from_timestamp(utc_timestamp):

    return naive2utc(datetime.datetime.utcfromtimestamp(utc_timestamp))

epoch = from_timestamp(0)

def strtotime(str_, default=epoch):

    import dateutil.parser

    return dateutil.parser.parse(str_, default=default)

class FormatException(ExceptionWithCause):

    def __init__(self, cause):

        ExceptionWithCause.__init__(self, 'Invalid input value', cause)

if date != None:

    str_ = date

    try: year = float(str_)

    except ValueError:

        try: date = strtotime(str_)

        except ImportError: return str_

        except ValueError, e: raise FormatException(e)

    else: date = (datetime.date(int(year), 1, 1) +

        datetime.timedelta(round((year % 1.)*365)))

else:

    # Year is required

    if year == None:

        if month == None and day == None: return None # entire date is empty

        else: raise FormatException(ValueError('Year is required'))

    # Convert month name to number

    if month != None and not month.isdigit(): # month is name

        try: month = str(strtotime(month).month)

        except ValueError, e: raise FormatException(e)

    if month == None: month = 1

    if day == None: day = 1

    year, month, day = map(int, (year, month, day))

    for try_num in xrange(2):

        try:

            date = datetime.date(year, month, day)

            break

        except ValueError, e:

            if try_num > 0: raise FormatException(e)

                # exception still raised after retry

            msg = e_str(e)

            if msg == 'month must be in 1..12': # try swapping month and day

                month, day = day, month

            else: raise FormatException(e)

--

CREATE FUNCTION "_dateRangeEnd"(value text) RETURNS text

    LANGUAGE sql IMMUTABLE

    AS $_$

SELECT (py_functions.parse_date_range($1))[2]

$_$;

-- Name: _dateRangeStart(text); Type: FUNCTION; Schema: py_functions; Owner: bien

--

CREATE FUNCTION "_dateRangeStart"(value text) RETURNS text

    LANGUAGE sql IMMUTABLE

    AS $_$

SELECT (py_functions.parse_date_range($1))[1]

$_$;

--

CREATE FUNCTION "_namePart"(first text DEFAULT NULL::text, middle text DEFAULT NULL::text, last text DEFAULT NULL::text) RETURNS text

    AS $$

_name_parts_slices_items = [

    ('first', slice(None, 1)),

    ('middle', slice(1, -1)),

    ('last', slice(-1, None)),

]

name_parts_slices = dict(_name_parts_slices_items)

name_parts = [name for name, slice_ in _name_parts_slices_items]

def _name(items):

    items = dict(items)

    parts = []

    for part in name_parts:

        if part in items: parts.append(items[part])

    return ' '.join(parts)

out_items = []

    try: slice_ = name_parts_slices[part]

    except KeyError: pass # a non-value column

    else: out_items.append((part, ' '.join(value.split(' ')[slice_])))

--

CREATE FUNCTION parse_date_range(str_ text) RETURNS text[]

    LANGUAGE plpythonu IMMUTABLE STRICT

    AS $$

import re

def single_space(str_): return re.sub(r' {2,}', r' ', str_.strip())

def could_be_year(str_): return str_.isdigit() and len(str_) == 4

def could_be_day(str_): return str_.isdigit() and len(str_) <= 2

range_sep='-'

part_sep=' '

default = (str_, None)

# range_sep might be used as date part separator instead

if str_.find(part_sep) < 0: return default

start, sep, end = str_.partition(range_sep)

if sep == '': return default # not a range

start, end = (single_space(d).split(part_sep) for d in (start, end))

# Has form M D1-D2 or M D1-D2 Y (not M1 Y1-M2 Y2 or M1 D1-M2 D2)

if len(start) == 2 and (len(end) == 1 or (

        len(end) == 2 and could_be_day(start[-1]) and could_be_day(end[0])

        and could_be_year(end[-1])

    )):

    end.insert(0, start[0]) # make end fully specified

ct_diff = len(end) - len(start)

# Has form D1-D2 M Y, M1 D1-M2 D2 Y, M1-M2 Y, etc.

if ct_diff > 0: start += end[-ct_diff:] # make start fully specified

# Other forms are invalid and will be left as-is

return [part_sep.join(d) for d in (start, end)]

$$;

SET default_with_oids = false;

--

--

CREATE TABLE "_dateRangeEnd" (

    result text,

    not_null_col boolean DEFAULT true NOT NULL,

    value text

);

--

CREATE TABLE "_dateRangeStart" (

    result text,

    not_null_col boolean DEFAULT true NOT NULL,

    value text

);

--

CREATE TABLE "_namePart" (

    result text,

    not_null_col boolean DEFAULT true NOT NULL,

    first text,

    middle text,

    last text

);

--

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