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"""Generic routing utilities."""
import json
from json.decoder import JSONDecodeError
from flask import (flash,
url_for,
request,
redirect,
render_template,
current_app as app)
from gn_libs.mysqldb import database_connection
from uploader.datautils import base64_encode_dict, base64_decode_to_dict
from uploader.population.models import (populations_by_species,
population_by_species_and_id)
def generic_select_population(
# pylint: disable=[too-many-arguments, too-many-positional-arguments]
species: dict,
template: str,
population_id: str,
back_to: str,
forward_to: str,
activelink: str,
error_message: str = "No such population found!"
):
"""Handles common flow for 'select population' step."""
with database_connection(app.config["SQL_URI"]) as conn:
if not bool(population_id):
return render_template(
template,
species=species,
populations=populations_by_species(conn, species["SpeciesId"]),
activelink=activelink)
if population_id == "CREATE-POPULATION":
return redirect(url_for(
"species.populations.create_population",
species_id=species["SpeciesId"],
return_to=forward_to))
population = population_by_species_and_id(
conn, species["SpeciesId"], int(population_id))
if not bool(population):
flash(error_message, "alert-danger")
return redirect(url_for(back_to, species_id=species["SpeciesId"]))
return redirect(url_for(forward_to,
species_id=species["SpeciesId"],
population_id=population["Id"]))
def redirect_to_next(default: dict):
"""Redirect to the next uri if specified, else redirect to default."""
assert "uri" in default, "You must provide at least the 'uri' value."
try:
next_page = base64_decode_to_dict(request.args.get("next"))
return redirect(url_for(
next_page["uri"],
**{key:value for key,value in next_page.items()}))
except (TypeError, JSONDecodeError) as _err:
logger.debug("We could not decode the next value '%s'",
next_page,
exc_info=True)
return redirect(url_for(
default["uri"],
**{key:value for key,value in default.items()}))
def build_next_argument(uri: str, **kwargs) -> str:
"""Build the `next` URI argument from provided details."""
dumps_keywords = (
"skipkeys", "ensure_ascii", "check_circular", "allow_nan", "cls",
"indent", "separators", "default", "sort_keys")
return base64_encode_dict(
{
"uri": uri,
**{
key: val for key,val in kwargs.items()
if key not in dumps_keywords
}
},
**{
key: val for key,val in kwargs.items()
if key in dumps_keywords
})
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