views.py

from dgenies import app, app_title, app_folder, config_reader, mailer, APP_DATA, MODE, DEBUG

import os
import time
import datetime
import shutil
import re
import threading
import traceback
from flask import render_template, request, url_for, jsonify, Response, abort, send_file, Markup
from pathlib import Path
from dgenies.lib.paf import Paf
from dgenies.lib.job_manager import JobManager
from dgenies.lib.functions import Functions, ALLOWED_EXTENSIONS
from dgenies.lib.upload_file import UploadFile
from dgenies.lib.fasta import Fasta
from dgenies.tools import Tools
from markdown import Markdown
from markdown.extensions.toc import TocExtension
if MODE == "webserver":
    from dgenies.database import Session, Gallery
    from peewee import DoesNotExist


@app.context_processor
def global_templates_variables():
    return {
        "title": app_title,
        "mode": MODE,
        "all_jobs": Functions.get_list_all_jobs(MODE),
        "debug": DEBUG
    }


# Main
@app.route("/", methods=['GET'])
def main():
    if MODE == "webserver":
        pict = Gallery.select().order_by("id")
        if len(pict) > 0:
            pict = pict[0].picture
        else:
            pict = None
    else:
        pict = None
    return render_template("index.html", menu="index", pict=pict)


@app.route("/run", methods=['GET'])
def run():
    tools = Tools().tools
    tools_names = sorted(list(tools.keys()), key=lambda x: (tools[x].order, tools[x].name))
    tools_ava = {}
    for tool_name, tool in tools.items():
        tools_ava[tool_name] = 1 if tool.all_vs_all is not None else 0
    if MODE == "webserver":
        with Session.connect():
            s_id = Session.new()
    else:
        upload_folder = Functions.random_string(20)
        tmp_dir = config_reader.upload_folder
        upload_folder_path = os.path.join(tmp_dir, upload_folder)
        while os.path.exists(upload_folder_path):
            upload_folder = Functions.random_string(20)
            upload_folder_path = os.path.join(tmp_dir, upload_folder)
        s_id = upload_folder
    id_job = Functions.random_string(5) + "_" + datetime.datetime.fromtimestamp(time.time()).strftime('%Y%m%d%H%M%S')
    if "id_job" in request.args:
        id_job = request.args["id_job"]
    email = ""
    if "email" in request.args:
        email = request.args["email"]
    return render_template("run.html", id_job=id_job, email=email,
                           menu="run", allowed_ext=ALLOWED_EXTENSIONS, s_id=s_id,
                           max_upload_file_size=config_reader.max_upload_file_size,
                           example=config_reader.example_target != "",
                           target=os.path.basename(config_reader.example_target),
                           query=os.path.basename(config_reader.example_query), tools_names=tools_names, tools=tools,
                           tools_ava=tools_ava)


@app.route("/run-test", methods=['GET'])
def run_test():
    if MODE == "webserver":
        print(config_reader.allowed_ip_tests)
        if request.remote_addr not in config_reader.allowed_ip_tests:
            return abort(404)
        with Session.connect():
            return Session.new()
    return abort(500)


# Launch analysis
@app.route("/launch_analysis", methods=['POST'])
def launch_analysis():
    if MODE == "webserver":
        try:
            with Session.connect():
                session = Session.get(s_id=request.form["s_id"])
        except DoesNotExist:
            return jsonify({"success": False, "errors": ["Session has expired. Please refresh the page and try again"]})
        upload_folder = session.upload_folder
        # Delete session:
        session.delete_instance()
    else:
        upload_folder = request.form["s_id"]

    id_job = request.form["id_job"]
    email = request.form["email"]
    file_query = request.form["query"]
    file_query_type = request.form["query_type"]
    file_target = request.form["target"]
    file_target_type = request.form["target_type"]
    tool = request.form["tool"] if "tool" in request.form else None
    alignfile = request.form["alignfile"] if "alignfile" in request.form else None
    alignfile_type = request.form["alignfile_type"] if "alignfile_type" in request.form else None

    # Check form:
    form_pass = True
    errors = []

    if alignfile is not None and alignfile_type is None:
        errors.append("Server error: no alignfile_type in form. Please contact the support")
        form_pass = False

    if tool is not None and tool not in Tools().tools:
        errors.append("Tool unavailable: %s" % tool)
        form_pass = False

    if id_job == "":
        errors.append("Id of job not given")
        form_pass = False

    if MODE == "webserver":
        if email == "":
            errors.append("Email not given")
            form_pass = False
        elif not re.match(r"^[\w.\-]+@[\w\-.]{2,}\.[a-z]{2,4}$", email):
            errors.append("Email is invalid")
            form_pass = False
    if file_target == "":
        errors.append("No target fasta selected")
        form_pass = False

    # Form pass
    if form_pass:
        # Get final job id:
        id_job = re.sub('[^A-Za-z0-9_\-]+', '', id_job.replace(" ", "_"))
        id_job_orig = id_job
        i = 2
        while os.path.exists(os.path.join(APP_DATA, id_job)):
            id_job = id_job_orig + ("_%d" % i)
            i += 1

        folder_files = os.path.join(APP_DATA, id_job)
        os.makedirs(folder_files)

        # Save files:
        query = None
        if file_query != "":
            example = False
            if file_query.startswith("example://"):
                example = True
                query_path = config_reader.example_query
                query_name = os.path.basename(query_path)
                file_query_type = "local"
            else:
                query_name = os.path.splitext(file_query.replace(".gz", ""))[0] if file_query_type == "local" else None
                query_path = os.path.join(app.config["UPLOAD_FOLDER"], upload_folder, file_query) \
                    if file_query_type == "local" else file_query
                if file_query_type == "local" and not os.path.exists(query_path):
                    errors.append("Query file not correct!")
                    form_pass = False
            query = Fasta(name=query_name, path=query_path, type_f=file_query_type, example=example)
        example = False
        if file_target.startswith("example://"):
            example = True
            target_path = config_reader.example_target
            target_name = os.path.basename(target_path)
            file_target_type = "local"
        else:
            target_name = os.path.splitext(file_target.replace(".gz", ""))[0] if file_target_type == "local" else None
            target_path = os.path.join(app.config["UPLOAD_FOLDER"], upload_folder, file_target) \
                if file_target_type == "local" else file_target
            if file_target_type == "local" and not os.path.exists(target_path):
                errors.append("Target file not correct!")
                form_pass = False
        target = Fasta(name=target_name, path=target_path, type_f=file_target_type, example=example)

        align = None
        if alignfile is not None:
            Path(os.path.join(folder_files, ".align")).touch()
            alignfile_name = os.path.splitext(alignfile)[0] if alignfile_type == "local" else None
            alignfile_path = os.path.join(app.config["UPLOAD_FOLDER"], upload_folder, alignfile) \
                if alignfile_type == "local" else alignfile
            if alignfile_type == "local" and not os.path.exists(alignfile_path):
                errors.append("Alignment file not correct!")
                form_pass = False
            align = Fasta(name=alignfile_name, path=alignfile_path, type_f=alignfile_type)

        if form_pass:
            # Launch job:
            job = JobManager(id_job=id_job,
                             email=email,
                             query=query,
                             target=target,
                             align=align,
                             mailer=mailer,
                             tool=tool)
            if MODE == "webserver":
                job.launch()
            else:
                job.launch_standalone()
            return jsonify({"success": True, "redirect": url_for(".status", id_job=id_job)})
    if not form_pass:
        return jsonify({"success": False, "errors": errors})


# Status of a job
@app.route('/status/<id_job>', methods=['GET'])
def status(id_job):
    job = JobManager(id_job)
    j_status = job.status()
    mem_peak = j_status["mem_peak"] if "mem_peak" in j_status else None
    if mem_peak is not None:
        mem_peak = "%.1f G" % (mem_peak / 1024.0 / 1024.0)
    time_e = j_status["time_elapsed"] if "time_elapsed" in j_status else None
    if time_e is not None:
        if time_e < 60:
            time_e = "%d secs" % time_e
        else:
            minutes = time_e // 60
            seconds = time_e - minutes * 60
            time_e = "%d min %d secs" % (minutes, seconds)
    format = request.args.get("format")
    if format is not None and format == "json":
        return jsonify({
            "status": j_status["status"],
            "error": j_status["error"].replace("#ID#", ""),
            "id_job": id_job,
            "mem_peak": mem_peak,
            "time_elapsed": time_e
        })
    return render_template("status.html", status=j_status["status"],
                           error=j_status["error"].replace("#ID#", ""),
                           id_job=id_job, menu="results", mem_peak=mem_peak,
                           time_elapsed=time_e, do_align=job.do_align(),
                           query_filtered=job.is_query_filtered(), target_filtered=job.is_target_filtered())


# Results path
@app.route("/result/<id_res>", methods=['GET'])
def result(id_res):
    res_dir = os.path.join(APP_DATA, id_res)
    return render_template("result.html", id=id_res, menu="result", current_result=id_res,
                           is_gallery=Functions.is_in_gallery(id_res, MODE),
                           fasta_file=Functions.query_fasta_file_exists(res_dir))


@app.route("/gallery", methods=['GET'])
def gallery():
    if MODE == "webserver":
        return render_template("gallery.html", items=Functions.get_gallery_items(), menu="gallery")
    return abort(404)


@app.route("/gallery/<filename>", methods=['GET'])
def gallery_file(filename):
    if MODE == "webserver":
        try:
            return send_file(os.path.join(config_reader.app_data, "gallery", filename))
        except FileNotFoundError:
            abort(404)
    return abort(404)


def get_file(file, gzip=False):  # pragma: no cover
    try:
        # Figure out how flask returns static files
        # Tried:
        # - render_template
        # - send_file
        # This should not be so non-obvious
        return open(file, "rb" if gzip else "r").read()
    except FileNotFoundError:
        abort(404)
    except IOError as exc:
        print(exc.__traceback__)
        abort(500)


@app.route("/documentation/run", methods=['GET'])
def documentation_run():
    with open(os.path.join(app_folder, "doc_run.md" if MODE == "webserver" else "doc_run_standalone.md"), "r",
              encoding='utf-8') as install_instr:
        content = install_instr.read()
    md = Markdown(extensions=[TocExtension(baselevel=1)])
    max_upload_file_size = config_reader.max_upload_file_size
    if max_upload_file_size == -1:
        max_upload_file_size = "no limit"
    else:
        max_upload_file_size = Functions.get_readable_size(max_upload_file_size, 0)
    max_upload_size = config_reader.max_upload_size
    if max_upload_size == -1:
        max_upload_size = "no limit"
    else:
        max_upload_size = Functions.get_readable_size(max_upload_size, 0)
    max_upload_size_ava = config_reader.max_upload_size_ava
    if max_upload_size_ava == -1:
        max_upload_size_ava = "no limit"
    else:
        max_upload_size_ava = Functions.get_readable_size(max_upload_size_ava, 0)
    content = Markup(md.convert(content)).replace("###size###", max_upload_file_size)\
                                         .replace("###size_unc###", max_upload_size)\
                                         .replace("###size_ava###", max_upload_size_ava)
    toc = Markup(md.toc)
    return render_template("documentation.html", menu="documentation", content=content, toc=toc)


@app.route("/documentation/result", methods=['GET'])
def documentation_result():
    with open(os.path.join(app_folder, "user_manual.md"), "r",
              encoding='utf-8') as install_instr:
        content = install_instr.read()
    md = Markdown(extensions=[TocExtension(baselevel=1)])
    content = Markup(md.convert(content))
    toc = Markup(md.toc)
    return render_template("documentation.html", menu="documentation", content=content, toc=toc)


@app.route("/install", methods=['GET'])
def install():
    with open(os.path.join(app_folder, "INSTALL.md"), "r", encoding='utf-8') as install_instr:
        content = install_instr.read()
    md = Markdown(extensions=[TocExtension(baselevel=1)])
    content = Markup(md.convert(content))
    toc = Markup(md.toc)
    return render_template("documentation.html", menu="install", content=content, toc=toc)

@app.route("/contact", methods=['GET'])
def contact():
    return render_template("contact.html", menu="contact")


@app.route("/paf/<id_res>", methods=['GET'])
def download_paf(id_res):
    map_file = os.path.join(APP_DATA, id_res, "map.paf.sorted")
    if not os.path.exists(map_file):
        map_file = os.path.join(APP_DATA, id_res, "map.paf")
    if not os.path.exists(map_file):
        abort(404)
    content = get_file(map_file)
    return Response(content, mimetype="text/plain")


# Get graph (ajax request)
@app.route('/get_graph', methods=['POST'])
def get_graph():
    id_f = request.form["id"]
    paf = os.path.join(APP_DATA, id_f, "map.paf")
    idx1 = os.path.join(APP_DATA, id_f, "query.idx")
    idx2 = os.path.join(APP_DATA, id_f, "target.idx")

    paf = Paf(paf, idx1, idx2)

    if paf.parsed:
        res = paf.get_d3js_data()
        res["success"] = True
        return jsonify(res)
    return jsonify({"success": False, "message": paf.error})


@app.route('/sort/<id_res>', methods=['POST'])
def sort_graph(id_res):
    if not os.path.exists(os.path.join(APP_DATA, id_res, ".all-vs-all")):
        paf_file = os.path.join(APP_DATA, id_res, "map.paf")
        idx1 = os.path.join(APP_DATA, id_res, "query.idx")
        idx2 = os.path.join(APP_DATA, id_res, "target.idx")
        paf = Paf(paf_file, idx1, idx2, False)
        paf.sort()
        if paf.parsed:
            res = paf.get_d3js_data()
            res["success"] = True
            return jsonify(res)
        return jsonify({"success": False, "message": paf.error})
    return jsonify({"success": False, "message": "Sort is not available for All-vs-All mode"})


@app.route('/reverse-contig/<id_res>', methods=['POST'])
def reverse_contig(id_res):
    contig_name = request.form["contig"]
    if not os.path.exists(os.path.join(APP_DATA, id_res, ".all-vs-all")):
        paf_file = os.path.join(APP_DATA, id_res, "map.paf")
        idx1 = os.path.join(APP_DATA, id_res, "query.idx")
        idx2 = os.path.join(APP_DATA, id_res, "target.idx")
        paf = Paf(paf_file, idx1, idx2, False)
        paf.reverse_contig(contig_name)
        if paf.parsed:
            res = paf.get_d3js_data()
            res["success"] = True
            return jsonify(res)
        return jsonify({"success": False, "message": paf.error})
    return jsonify({"success": False, "message": "Sort is not available for All-vs-All mode"})


@app.route('/freenoise/<id_res>', methods=['POST'])
def free_noise(id_res):
    paf_file = os.path.join(APP_DATA, id_res, "map.paf")
    idx1 = os.path.join(APP_DATA, id_res, "query.idx")
    idx2 = os.path.join(APP_DATA, id_res, "target.idx")
    paf = Paf(paf_file, idx1, idx2, False)
    paf.parse_paf(noise=request.form["noise"] == "1")
    if paf.parsed:
        res = paf.get_d3js_data()
        res["success"] = True
        return jsonify(res)
    return jsonify({"success": False, "message": paf.error})


@app.route('/get-fasta-query/<id_res>', methods=['POST'])
def build_fasta(id_res):
    res_dir = os.path.join(APP_DATA, id_res)
    lock_query = os.path.join(res_dir, ".query-fasta-build")
    is_sorted = os.path.exists(os.path.join(res_dir, ".sorted"))
    compressed = request.form["gzip"].lower() == "true"
    query_fasta = Functions.get_fasta_file(res_dir, "query", is_sorted)
    if query_fasta is not None:
        if is_sorted and not query_fasta.endswith(".sorted"):
            # Do the sort
            Path(lock_query).touch()
            if not compressed or MODE == "standalone":  # If compressed, it will took a long time, so not wait
                Path(lock_query + ".pending").touch()
            index_file = os.path.join(res_dir, "query.idx.sorted")
            if MODE == "webserver":
                thread = threading.Timer(1, Functions.sort_fasta, kwargs={
                    "job_name": id_res,
                    "fasta_file": query_fasta,
                    "index_file": index_file,
                    "lock_file": lock_query,
                    "compress": compressed,
                    "mailer": mailer,
                    "mode": MODE
                })
                thread.start()
            else:
                Functions.sort_fasta(job_name=id_res,
                                     fasta_file=query_fasta,
                                     index_file=index_file,
                                     lock_file=lock_query,
                                     compress=compressed,
                                     mailer=None,
                                     mode=MODE)
            if not compressed or MODE == "standalone":
                if MODE == "webserver":
                    i = 0
                    time.sleep(5)
                    while os.path.exists(lock_query) and (i < 2 or MODE == "standalone"):
                        i += 1
                        time.sleep(5)
                os.remove(lock_query + ".pending")
                if os.path.exists(lock_query):
                    return jsonify({"success": True, "status": 1, "status_message": "In progress"})
                return jsonify({"success": True, "status": 2, "status_message": "Done",
                                "gzip": compressed})
            else:
                return jsonify({"success": True, "status": 1, "status_message": "In progress"})
        elif is_sorted and os.path.exists(lock_query):
            # Sort is already in progress
            return jsonify({"success": True, "status": 1, "status_message": "In progress"})
        else:
            # No sort to do or sort done
            if compressed and not query_fasta.endswith(".gz.fasta"):
                # If compressed file is asked, we must compress it now if not done before...
                Path(lock_query).touch()
                thread = threading.Timer(1, Functions.compress_and_send_mail, kwargs={
                    "job_name": id_res,
                    "fasta_file": query_fasta,
                    "index_file": os.path.join(res_dir, "query.idx.sorted"),
                    "lock_file": lock_query,
                    "compressed": compressed,
                    "mailer": mailer
                })
                thread.start()
                return jsonify({"success": True, "status": 1, "status_message": "In progress"})
            return jsonify({"success": True, "status": 2, "status_message": "Done",
                            "gzip": query_fasta.endswith(".gz") or query_fasta.endswith(".gz.sorted")})
    else:
        return jsonify({"success": False,
                        "message": "Unable to get fasta file for query. Please contact us to report the bug"})


def build_query_as_reference(id_res):
    paf_file = os.path.join(APP_DATA, id_res, "map.paf")
    idx1 = os.path.join(APP_DATA, id_res, "query.idx")
    idx2 = os.path.join(APP_DATA, id_res, "target.idx")
    paf = Paf(paf_file, idx1, idx2, False, mailer=mailer, id_job=id_res)
    paf.parse_paf(False, True)
    if MODE == "webserver":
        thread = threading.Timer(0, paf.build_query_chr_as_reference)
        thread.start()
        return True
    return paf.build_query_chr_as_reference()


@app.route('/build-query-as-reference/<id_res>', methods=['POST'])
def post_query_as_reference(id_res):
    build_query_as_reference(id_res)
    return jsonify({"success": True})


@app.route('/get-query-as-reference/<id_res>', methods=['GET'])
def get_query_as_reference(id_res):
    if MODE != "standalone":
        return abort(404)
    return send_file(build_query_as_reference(id_res))


@app.route('/download/<id_res>/<filename>')
def download_file(id_res, filename):
    file_dl = os.path.join(APP_DATA, id_res, filename)
    if os.path.isfile(file_dl):
        return send_file(file_dl)
    return abort(404)


@app.route('/fasta-query/<id_res>', defaults={'filename': ""}, methods=['GET'])
@app.route('/fasta-query/<id_res>/<filename>', methods=['GET'])  # Use fake URL in mail to set download file name
def dl_fasta(id_res, filename):
    res_dir = os.path.join(APP_DATA, id_res)
    lock_query = os.path.join(res_dir, ".query-fasta-build")
    is_sorted = os.path.exists(os.path.join(res_dir, ".sorted"))
    if not os.path.exists(lock_query) or not is_sorted:
        query_fasta = Functions.get_fasta_file(res_dir, "query", is_sorted)
        if query_fasta is not None:
            if query_fasta.endswith(".gz") or query_fasta.endswith(".gz.sorted"):
                content = get_file(query_fasta, True)
                return Response(content, mimetype="application/gzip")
            content = get_file(query_fasta)
            return Response(content, mimetype="text/plain")
    abort(404)


@app.route('/qt-assoc/<id_res>', methods=['GET'])
def qt_assoc(id_res):
    res_dir = os.path.join(APP_DATA, id_res)
    if os.path.exists(res_dir) and os.path.isdir(res_dir):
        paf_file = os.path.join(APP_DATA, id_res, "map.paf")
        idx1 = os.path.join(APP_DATA, id_res, "query.idx")
        idx2 = os.path.join(APP_DATA, id_res, "target.idx")
        try:
            paf = Paf(paf_file, idx1, idx2, False)
            paf.parse_paf(False)
        except FileNotFoundError:
            print("Unable to load data!")
            abort(404)
            return False
        csv_content = paf.build_query_on_target_association_file()
        return Response(csv_content, mimetype="text/plain")
    abort(404)


@app.route('/no-assoc/<id_res>', methods=['POST'])
def no_assoc(id_res):
    """
    Get contigs that match with None target
    :param id_res: id of the result
    """
    res_dir = os.path.join(APP_DATA, id_res)
    if os.path.exists(res_dir) and os.path.isdir(res_dir):
        paf_file = os.path.join(APP_DATA, id_res, "map.paf")
        idx1 = os.path.join(APP_DATA, id_res, "query.idx")
        idx2 = os.path.join(APP_DATA, id_res, "target.idx")
        try:
            paf = Paf(paf_file, idx1, idx2, False)
        except FileNotFoundError:
            print("Unable to load data!")
            abort(404)
            return False
        file_content = paf.build_list_no_assoc(request.form["to"])
        empty = file_content == "\n"
        return jsonify({
            "file_content": file_content,
            "empty": empty
        })
    abort(404)


@app.route('/summary/<id_res>', methods=['POST'])
def summary(id_res):
    paf_file = os.path.join(APP_DATA, id_res, "map.paf")
    idx1 = os.path.join(APP_DATA, id_res, "query.idx")
    idx2 = os.path.join(APP_DATA, id_res, "target.idx")
    try:
        paf = Paf(paf_file, idx1, idx2, False)
    except FileNotFoundError:
        return jsonify({
            "success": False,
            "message": "Unable to load data!"
        })
    percents = None
    s_status = "waiting"  # Accepted values: waiting, done, fail
    status_file = os.path.join(APP_DATA, id_res, ".summarize")
    fail_file = status_file + ".fail"
    if not os.path.exists(status_file):  # The job is finished or not started
        if not os.path.exists(fail_file):  # The job has not started yet or has successfully ended
            percents = paf.get_summary_stats()
            if percents is None:  # The job has not started yet
                Path(status_file).touch()
                thread = threading.Timer(0, paf.build_summary_stats, kwargs={"status_file": status_file})
                thread.start()
            else:  # The job has successfully ended
                s_status = "done"
        else:  # The job has failed
            s_status = "fail"

    if s_status == "waiting":  # The job is running
        # Check if the job end in the next 30 seconds
        nb_iter = 0
        while os.path.exists(status_file) and not os.path.exists(fail_file) and nb_iter < 10:
            time.sleep(3)
            nb_iter += 1
        if not os.path.exists(status_file):  # The job has ended
            percents = paf.get_summary_stats()
            if percents is None:  # The job has failed
                s_status = "fail"
            else:  # The job has successfully ended
                s_status = "done"

    if s_status == "fail":
        return jsonify({
            "success": False,
            "message": "Build of summary failed. Please contact us to report the bug"
        })
    return jsonify({
        "success": True,
        "percents": percents,
        "status": s_status
    })


def get_filter_out(id_res, type_f):
    filter_file = os.path.join(APP_DATA, id_res, ".filter-" + type_f)
    return Response(get_file(filter_file), mimetype="text/plain")


@app.route('/filter-out/<id_res>/query')
def get_filter_out_query(id_res):
    return get_filter_out(id_res=id_res, type_f="query")


@app.route('/filter-out/<id_res>/target')
def get_filter_out_target(id_res):
    return get_filter_out(id_res=id_res, type_f="target")


@app.route("/ask-upload", methods=['POST'])
def ask_upload():
    if MODE == "standalone":
        return jsonify({
            "success": True,
            "allowed": True
        })
    try:
        s_id = request.form['s_id']
        with Session.connect():
            session = Session.get(s_id=s_id)
            allowed = session.ask_for_upload(True)
        return jsonify({
            "success": True,
            "allowed": allowed
        })
    except DoesNotExist:
        return jsonify({"success": False, "message": "Session not initialized. Please refresh the page."})


@app.route("/ping-upload", methods=['POST'])
def ping_upload():
    if MODE == "webserver":
        s_id = request.form['s_id']
        with Session.connect():
            session = Session.get(s_id=s_id)
            session.ping()
    return "OK"


@app.route("/upload", methods=['POST'])
def upload():
    try:
        s_id = request.form['s_id']
        if MODE == "webserver":
            try:
                with Session.connect():
                    session = Session.get(s_id=s_id)
                    if session.ask_for_upload(False):
                        folder = session.upload_folder
                    else:
                        return jsonify({"files": [], "success": "ERR", "message": "Not allowed to upload!"})
            except DoesNotExist:
                return jsonify(
                    {"files": [], "success": "ERR", "message": "Session not initialized. Please refresh the page."})
        else:
            folder = s_id

        files = request.files[list(request.files.keys())[0]]

        if files:
            filename = files.filename
            folder_files = os.path.join(app.config["UPLOAD_FOLDER"], folder)
            if not os.path.exists(folder_files):
                os.makedirs(folder_files)
            filename = Functions.get_valid_uploaded_filename(filename, folder_files)
            mime_type = files.content_type

            if not Functions.allowed_file(files.filename, request.form['formats'].split(",")):
                result = UploadFile(name=filename, type_f=mime_type, size=0, not_allowed_msg="File type not allowed")
                shutil.rmtree(folder_files)

            else:
                # save file to disk
                uploaded_file_path = os.path.join(folder_files, filename)
                files.save(uploaded_file_path)

                # get file size after saving
                size = os.path.getsize(uploaded_file_path)

                # return json for js call back
                result = UploadFile(name=filename, type_f=mime_type, size=size)

            return jsonify({"files": [result.get_file()], "success": "OK"})

        return jsonify({"files": [], "success": "404", "message": "No file provided"})
    except:  # Except all possible exceptions to prevent crashes
        traceback.print_exc()
        return jsonify({"files": [], "success": "ERR", "message": "An unexpected error has occurred on upload. "
                                                                  "Please contact the support."})


@app.route("/send-mail/<id_res>", methods=['POST'])
def send_mail(id_res):
    allowed = False
    key_file = None
    if "key" in request.form:
        key = request.form["key"]
        res_dir = os.path.join(APP_DATA, id_res)
        key_file = os.path.join(res_dir, ".key")
        if os.path.exists(key_file):
            with open(key_file) as k_f:
                true_key = k_f.readline().strip("\n")
                allowed = key == true_key
    if allowed:
        os.remove(key_file)
        job_mng = JobManager(id_job=id_res, mailer=mailer)
        job_mng.set_inputs_from_res_dir()
        job_mng.send_mail()
        return "OK"
    else:
        abort(403)


@app.route("/delete/<id_res>", methods=['POST'])
def delete_job(id_res):
    job = JobManager(id_job=id_res)
    success, error = job.delete()
    return jsonify({
        "success": success,
        "error": error
    })