import jsl

import json

iso_dates = ['YYYYMMDD', 'YYYY-MM-DD', 'YYYY-MM']

iso_times = ['hh:mm', 'hhmm']

all_iso = iso_dates + iso_times + ['{d}T{t}'.format(d=d, t=t)

for d in iso_dates[:2]

for t in iso_times]

class MOBaseField(jsl.Document):

name = jsl.StringField(required=True, description='Title of the header row of this field')

description = jsl.StringField(description='Data dictionary entry for this field')

nullable = jsl.BooleanField(description='Must be present and set to False for this field to be blank')

class MOStringField(MOBaseField):

type = jsl.StringField(enum=['string'], required=True, description='Data type identifier')

size = jsl.IntField(minimum=1, required=True, description='Maximum number of code points in string')

class MODateField(MOBaseField):

type = jsl.StringField(enum=['date'], required=True, description='Data type identifier')

pattern = jsl.StringField(enum=all_iso,

description="subset of ISO 8601 allowed formats date format")

class MOIntegerField(MOBaseField):

description='Number of bytes needed to store value. Not the number of bytes/characters of text')

class MOBooleanField(MOBaseField):

false_value = jsl.StringField(required=True, description='The textual representation of FALSE')

class MODecimalField(MOBaseField):

'E.g. 123.45 has a scale of 2')

class MOForeignKeyMetaData(jsl.Document):

field = jsl.StringField(required=True, description='The name of the field in the foreign table')

class MOForeignKeyField(jsl.Document):

name = jsl.StringField(required=True, description='Title of the header row of this field')

foreign_key = jsl.DocumentField(MOForeignKeyMetaData)

class MOTable(jsl.Document):

description='The ordered list of fields as they will appear in the file')

class MediaOceanFileExtractSchema(jsl.Document):

description='A list of files and the associated tables within this schema')

with open("mediaocean_fileschemas.json", mode='wt') as fout:

json.dump(MediaOceanFileExtractSchema.get_schema(), fout)