From 1785da36f068b66d29998b177f9f71722459c704 Mon Sep 17 00:00:00 2001
From: Nicolas Vanvyve <nicolas.vanvyve@student.uclouvain.be>
Date: Tue, 3 Dec 2019 00:10:57 +0100
Subject: [PATCH] Extract data from JSON

---
 ihatemoney/utils.py | 19 +++++++++++++++++++
 ihatemoney/web.py   | 38 +++++++++++++++++++++++++++++++++++---
 2 files changed, 54 insertions(+), 3 deletions(-)

diff --git a/ihatemoney/utils.py b/ihatemoney/utils.py
index cdc11c9c..50a4eef5 100644
--- a/ihatemoney/utils.py
+++ b/ihatemoney/utils.py
@@ -234,3 +234,22 @@ def eval_arithmetic_expression(expr):
         raise ValueError("Error evaluating expression: {}".format(expr))
 
     return result
+
+def get_members(file):
+    members_list = list()
+    for item in file:
+        if (item['payer_name'], item['payer_weight']) not in members_list:
+            members_list.append((item['payer_name'], item['payer_weight']))
+    for item in file:
+        for ower in item['owers']:
+            if ower not in [i[0] for i in members_list]:
+                members_list.append((ower,1))
+
+    return members_list
+
+def same_bill(bill1,bill2):
+    attr = ["what", "payer_name", "payer_weight", "amount", "date", "owers"]
+    for a in attr:
+        if bill1[a] != bill2[a]:
+            return False
+    return True
diff --git a/ihatemoney/web.py b/ihatemoney/web.py
index 7692673a..abad2a2c 100644
--- a/ihatemoney/web.py
+++ b/ihatemoney/web.py
@@ -8,7 +8,7 @@ Basically, this blueprint takes care of the authentication and provides
 some shortcuts to make your life better when coding (see `pull_project`
 and `add_project_id` for a quick overview)
 """
-
+import json
 import os
 from flask import (
     abort,
@@ -49,6 +49,8 @@ from ihatemoney.utils import (
     list_of_dicts2json,
     list_of_dicts2csv,
     LoginThrottler,
+    get_members,
+    same_bill
 )
 
 main = Blueprint("main", __name__)
@@ -396,15 +398,45 @@ def upload_json():
     form = UploadForm()
     pid = g.project.id
     if form.validate_on_submit():
-        filename = pid+"_uploaded_bills.json"
+        filename = pid + "_uploaded_bills.json"
         form.file.data.save(filename)
-        return redirect(url_for('upload'))
+        import_project(filename)
         os.remove(filename)
+        flash(_("Project successfully uploaded"))
         return redirect(url_for('main.list_bills'))
 
     return render_template('upload_json.html', form=form)
 
 
+def import_project(file):
+    # From json : export list of members
+    json_file = json.load(open(file))
+    members = get_members(json_file)
+    active_members = g.project.active_members
+    members_already_here = list()
+    for m in active_members:
+        members_already_here.append(str(m))
+
+    # List all members not in the project and weight associated
+    # List of tuples (name,weight)
+    members_to_add = list()
+    for i in members:
+        if str(i[0]) not in members_already_here:
+            members_to_add.append(i)
+
+    # List bills not in the project
+    # Same format than JSON element
+    project_bills = g.project.get_pretty_bills()
+    bill_to_add = list()
+    for j in json_file:
+        same = False
+        for p in project_bills:
+            if same_bill(p, j):
+                same = True
+                break
+        if not same:
+            bill_to_add.append(j)
+
 @main.route("/<project_id>/delete")
 def delete_project():
     g.project.remove_project()