#
# File: sf/htdocs/books/swift/app/form.py
#
# This file is designed to convert tree data from a 
# csv format (at opentrees.org) to a geojson format.
# This version generates a random subset of all geojson data objects from
# opentrees.data.geojson
#
# This effort is part of the earthtree ios swift app which is 
# designed to display and map trees in the entire world! one by one!
#
# This geojson data will need to be provided to the app via an "api"
# because the complete data is too big (currently 230 meg approximately).
# I will use the codable swift protocol to convert the geojson data
# to swift objects, and the UITableViews, MapKits etc to display it and 
# hopefully, to edit it, add to it. 
#
# History:
#  june 2019 
#    wrote this python formatter, which is the first python
#    thingy I have ever written. 
#  27 June 2019
#    various geojson schema bugs 

import csv
import random

with open('opentrees.data.csv', mode='r') as f:
  reader = csv.DictReader(f)
  s = """
{
  "type": "FeatureCollection",
  "features": [
"""
  print s

  # Output pretty printed geojson data. 
  for row in reader:
    if 2 == random.randint(1,100):
      s = """
  {{
    "type": "Feature",
    "geometry": {{
      "type": "Point",
      "coordinates": [{lat}, {lon}]
    }},
    "properties": {{
      "genus": "{genus}",
      "species": "{species}",
      "variety": "{variety}",
      "description": "{description}",
      "common": "{common}",
      "height": "{height}",
      "crown": "{crown}",
      "dbh": "{dbh}",
      "health": "{health}",
      "structure": "{structure}",
      "source": "{source}"
    }}
  }}, """.format(**row)
      print s

  print " ] } "


# Field names in original csv file by steve bennett, at opentrees.org
# Some of these fields, I wont use, eg scientific ....

## id,geom,tree_type,genus,species,scientific,variety,description,common,height,crown,dbh,health,structure,captured,planted,ule_min,ule_max,ref,location,maturity,lat,lon,source,s