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#!/usr/bin/python3
#***************************** LICENSE START ***********************************
#
# Copyright 2018 ECMWF and INPE. This software is distributed under the terms
# of the Apache License version 2.0. In applying this license, ECMWF does not
# waive the privileges and immunities granted to it by virtue of its status as
# an Intergovernmental Organization or submit itself to any jurisdiction.
#
# ***************************** LICENSE END *************************************
import json
import sys
import os
import datetime
script_command_prefix = {"macro": "","python": "mv."}
script_param_assign_char = {"macro": ":","python": "="}
script_translate_class_param = { "macro": "class", "python": "class_"}
script_file_suffix = {"macro": ".mv","python": ".py"}
def load_json_mars(mars_file):
""" Reads json file and returns dictionary """
with open(mars_file, 'r') as defs:
dictionary_of_defs = json.load(defs)
return dictionary_of_defs
def load_json_layer(layer_file):
""" Reads json file and returns dictionary """
with open(layer_file, 'r') as defs:
dictionary_of_defs = json.load(defs)
return dictionary_of_defs
def build_title_request(main_title, short_name):
""" Generate Metview request for title """
start_text = "<grib_info key=\\'base-date\\' format=\\'%d.%m.%Y. %H\\' where=\\'shortName=" \
+ short_name + "\\' /> UTC"
step_text = "<grib_info key=\\'step\\' where=\\'shortName=" + short_name + "\\' />h"
valid_text = "<grib_info key=\\'valid-date\\' format=\\'%d.%m.%Y. %H\\' where=\\'shortName=" + short_name \
+ "\\' /> UTC"
title = "MTEXT,\n" \
+ " TEXT_LINE_1 = '" + main_title + " START: " + start_text + " STEP: " + step_text \
+ " VALID FOR: " + valid_text + "',\n" \
+ " TEXT_COLOUR = CHARCOAL"
return title
def build_title_script(main_title, short_name, mode):
""" Generate script code for title """
start_text = "<grib_info key='base-date' format='%d.%m.%Y. %H' where='shortName=" \
+ short_name + "' /> UTC"
step_text = "<grib_info key='step' where='shortName=" + short_name + "' />h"
valid_text = "<grib_info key='valid-date' format='%d.%m.%Y. %H' where='shortName=" + short_name \
+ "' /> UTC"
sep = script_param_assign_char[mode]
title = script_command_prefix[mode] + "mtext(\n" \
+ " text_line_1 " + sep + " \"" + main_title + " START: " + start_text + " STEP: " + step_text \
+ " VALID FOR = " + valid_text + "\",\n" \
+ " text_colour " + sep + " \"charcoal\")"
return title
def build_visdef_request(style_name):
""" Generate Metview request for contouring """
visdef = "MCONT,\n" \
+ " CONTOUR_AUTOMATIC_SETTING = STYLE_NAME, \n" \
+ " CONTOUR_STYLE_NAME = " + style_name + ",\n" \
+ " LEGEND = ON"
return visdef
def build_visdef_script(style_name, mode):
""" Generate script code for contouring """
sep = script_param_assign_char[mode]
visdef = script_command_prefix[mode] + "mcont(\n" \
+ " contour_automatic_setting " + sep + " \"style_name\",\n" \
+ " contour_style_name " + sep + " \"" + style_name + "\",\n" \
+ " legend " + sep + " \"on\")"
return visdef
def build_legend_request():
""" Generate Metview request for legend """
legend_req = "MLEGEND,\n" \
+ " LEGEND_TEXT_COLOUR = CHARCOAL"
return legend_req
def build_legend_script(mode):
""" Generate script code for legend """
sep = script_param_assign_char[mode]
legend = script_command_prefix[mode] + "mlegend(\n" \
+ " legend_text_colour " + sep +" \"charcoal\")"
return legend
def build_mars_script(mars, mode):
""" Generate code for MARS request """
sep = script_param_assign_char[mode]
text_for_mars = script_command_prefix[mode] + 'retrieve(\n'
for key in mars:
v = mars[key]
if type(v) == str:
if not v.startswith('[') or not v.endswith(']'):
v = "'" + v + "'"
if key == "class" :
key = script_translate_class_param[mode]
text_for_mars += ' ' + str(key) + ' ' + sep + ' ' + str(v) + ',\n'
text_for_mars = text_for_mars[:-2]
text_for_mars += ')'
return text_for_mars
def build_pproc_script_call(mars, pproc_func, short_name, pproc_func_extra_args, mode):
""" Generate code for calling post-processing of retrieved fields """
params = mars["param"]
if type(params) == list:
params_str = ", ".join(['\"' + s + '\"' for s in params])
# params_str = ", ".join(params)
params_str = '[' + params_str + ']'
else:
params_str = '[' + params + ']'
text_for_mars = pproc_func + '(' + params_str + ', data , \"' + short_name + "\""
for a in pproc_func_extra_args:
text_for_mars += ', ' + a
text_for_mars += ')'
return text_for_mars
def build_pproc_script_code(pproc_func, mode):
""" Generate code for post-processing of retrieved fields """
suffix = script_file_suffix[mode]
filename = os.environ["METVIEW_DIR_SHARE"] + "/eccharts/scripts/" + pproc_func + suffix
with open(filename, 'r') as fp:
return fp.read()
def steps_for_interval(step_str, interval, layer_name):
# define the available steps in MARS
if layer_name in {'mn2t', 'mx2t', '10m_fg_interval'}:
all_steps = list(range(0, 91))
all_steps.extend(list(range(93, 147, 3)))
all_steps.extend(list(range(150, 246, 6)))
else:
return ""
# convert the steps into an integer list
if not step_str.startswith('[') or not step_str.endswith(']'):
print("\'step\' is not formatted as a list:", step_str)
sys.exit(1)
steps = step_str[1:-1].split(",")
print("steps=", steps)
steps = [int(i) for i in steps]
print("steps=", steps)
# define the steps for the given interval
r_steps = []
for ts in steps:
step_start = ts - interval
step_end = ts
try:
idx_start = all_steps.index(step_start)
except ValueError:
print("Cannot retrieve data for interval ending at step:", ts, "h")
raise
try:
idx_end = all_steps.index(step_end)
except ValueError:
print("Cannot retrieve step:", step_end, "h for interval ending at step:", ts, "h")
raise
r_steps.extend(all_steps[idx_start+1:idx_end+1])
# print("r_steps=", r_steps)
# remove duplicates and sort
r_steps = sorted(list(set(r_steps)), key=int)
# return as a string
return "[" + ",".join([str(i) for i in r_steps]) + "]"
def main():
# get arguments
if len(sys.argv) < 8:
print("Too few arguments = " + str(len(sys.argv)) + ". Minimum number of arguments is 8.")
sys.exit(1)
mode = sys.argv[1]
if mode not in ("data", "macro", "python"):
print("Incorrect first argument: " + mode + " Allowed values: \"data\",\"macro\" or \"python\"")
sys.exit(1)
layer_def_file = sys.argv[2]
mars_def_file = sys.argv[3]
script_file = sys.argv[4]
request_file = sys.argv[5]
layer_name = sys.argv[6]
style_name = sys.argv[7]
need_title = sys.argv[8]
if need_title == "1":
need_title = True
else:
need_title = False
# Read json defs
layer_def = load_json_layer(layer_def_file)
mars_def = load_json_mars(mars_def_file)
# -----------------------------------
# Build macro code for MARS retrieval
# -----------------------------------
extra_mars_options = {}
interval = ""
# Read arguments for the mars request
arguments = sys.argv
for v in arguments[9:]:
try:
(key, val) = v.split('=')
except ValueError:
print("No key is defined in argument: ", v)
raise
# 'interval' is not a mars key. If it is defined we need to modify
# the steps so that a proper interval could be retrieved
if key != 'interval':
extra_mars_options[key] = val
else:
interval = val
# Get MARS request from layer definition
mars = mars_def[layer_name]['mars']
# Update it with the extra options
mars.update(extra_mars_options)
if interval:
steps = mars['step']
modified_steps = steps_for_interval(mars['step'], int(interval), layer_name)
if modified_steps:
mars['step'] = modified_steps
else:
print("Could not define steps for the specified interval=", interval)
sys.exit(1)
# print("name=", layer_name)
# print("title=", type(layer_def))
# print("mars=", mars)
# -----------------------------------
# Find out title and style
# -----------------------------------
# Get layer title
layer_title = layer_def[layer_name]['title']
# Get parameter shortName
short_name = mars_def[layer_name]['shortName']
# Get parameter post-processing option
pproc_func = mars_def[layer_name].get('proc', "")
# for certain layers we need to add extra parameters to the post processing
# script
pproc_func_extra_args = []
if interval:
pproc_func_extra_args.append(steps)
pproc_func_extra_args.append(interval)
# Get default style name if style is not defined
if style_name == "":
style_name = layer_def[layer_name]['style']
# -----------------------------------
# In data mode:
# -generate macro to retrieve data
# -define the title, contouring and legend as Metview requests
# -----------------------------------
if mode == "data":
# -----------------------------------
# Macro code to retrieve the data
# -----------------------------------
macro_text = "#Metview macro\n\n" \
+ "args=arguments()\n" \
+ "print(args)\n" \
+ "outputFile=args[1]\n" \
+ "data = " + build_mars_script(mars, "macro") + "\n\n"
if pproc_func:
macro_text += "data = " + build_pproc_script_call(mars, pproc_func, short_name, pproc_func_extra_args, "macro") + "\n\n"
macro_text += "write(outputFile,data)\n\n" \
+ "return(0)"
if pproc_func:
macro_text += "\n\n" + build_pproc_script_code(pproc_func, "macro")
req_text = ''
# --------------------------------
# Build title request
# --------------------------------
if need_title:
req_text += build_title_request(layer_title, short_name)
# --------------------------------
# Build visdef request
# --------------------------------
req_text += "\n\n" + build_visdef_request(style_name)
# --------------------------------
# Build legend request
# --------------------------------
req_text += "\n\n" + build_legend_request() + "\n"
# --------------------------------
# Save request into file
# --------------------------------
# print(req_text)
with open(request_file, 'w') as fp:
fp.write(req_text)
# -----------------------
# Save macro into file
# -----------------------
# print(macro_text)
with open(script_file, 'w') as fp:
fp.write(macro_text)
# -----------------------------------------------------------------------------
# In macro or python mode mode generate script to retrieve and plot the data
# -----------------------------------------------------------------------------
else:
if mode == "macro" :
script_text = "# Metview Macro\n\n"
else:
script_text = "import metview as mv\n\n"
# --------------------------------
# Add licence text
# --------------------------------
with open(os.environ["METVIEW_DIR_SHARE"] + "/etc/licence_for_macros.txt", 'r') as fp:
licence_text = fp.read().replace("[YEAR]", str(datetime.datetime.now().year))
for s in licence_text.split("\n"):
script_text += "# " + s + "\n"
# -------------------------------------
# Build post-processing code - Python
# -------------------------------------
if mode == "python" and pproc_func:
script_text += "\n# The post-processing function\n" + build_pproc_script_code(pproc_func, mode) + "\n\n"
# --------------------------------
# Build mars retrieval
# --------------------------------
script_text += "\n# Retrieve data from MARS\ndata = " + build_mars_script(mars, mode) + "\n\n"
# --------------------------------
# Build post-processing call
# --------------------------------
if pproc_func:
script_text += "# Perform post-processing on data\ndata = " \
+ build_pproc_script_call(mars, pproc_func, short_name, pproc_func_extra_args, mode) + "\n\n"
# --------------------------------
# Build title
# --------------------------------
if need_title:
script_text += "# Define title\ntitle = " + build_title_script(layer_title, short_name, mode) + "\n\n"
# --------------------------------
# Build visdef
# --------------------------------
script_text += "# Define contouring\ncont = " + build_visdef_script(style_name, mode) + "\n\n"
# --------------------------------
# Add legend
# --------------------------------
script_text += "# Define legend\nlegend = " + build_legend_script(mode) + "\n\n"
# ---------------------------------
# Plot command
# ---------------------------------
script_text += "# Generate plot\n" + script_command_prefix[mode]
if need_title:
script_text += "plot(data, title, cont, legend)\n\n"
else:
script_text += "plot(data, cont, legend)\n\n"
# -----------------------------------
# Build post-processing code - Macro
# -----------------------------------
if mode == "macro" and pproc_func:
script_text += "\n# The post-processing function\n" + build_pproc_script_code(pproc_func, mode) + "\n\n"
# -----------------------
# Save macro into file
# -----------------------
with open(script_file, 'w') as fp:
fp.write(script_text)
if __name__ == "__main__":
main()
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