{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import pandas as pd\n",
    "import matplotlib.pyplot as plt\n",
    "import numpy as np"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# You need to use the parser before to get the csv file.\n",
    "my_data = pd.read_csv('bretzel.csv', index_col='date', dtype=str)\n",
    "my_data = my_data.replace(to_replace=[np.NaN], value='')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "btz_core_id = {\n",
    "            'Nathan':   'user502298447',\n",
    "            'Louison':  'user435924815',\n",
    "            'Clément':  'user451690413',\n",
    "            'Théo':     'user490556008',\n",
    "            'Léopold':  'user483543500',\n",
    "            'Arnaud':   'user469821944',\n",
    "            }"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def words_frequency(data):\n",
    "    words_freq = data['msg_text']\n",
    "    words_freq = words_freq.astype(str)\n",
    "    remove_list = [',', '.', '(', ')', '{', '}', '[', ']', '-']\n",
    "    for char in remove_list:\n",
    "        words_freq = words_freq.str.replace(char, '')\n",
    "\n",
    "    # Replace apostrophes with spaces for word counting purposes\n",
    "    words_freq = words_freq.astype(str).str.replace('\\'', ' ')\n",
    "    words_freq = words_freq.str.lower().str.split(expand=True).stack().value_counts()\n",
    "    return words_freq"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "def plot_message_count(data):\n",
    "    for name in btz_core_id:\n",
    "        idx = data['sender_id']==btz_core_id.get(name)\n",
    "        time_range = pd.to_datetime(data.index[idx], yearfirst=True).to_series().dt.date\n",
    "        cumulative_count = 1+np.arange(time_range.shape[0])\n",
    "        plt.plot(time_range, cumulative_count, label=name)\n",
    "    plt.legend()\n",
    "    plt.xlabel('Date')\n",
    "    plt.ylabel('Nombre de messages')\n",
    "    plt.show()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "wf = words_frequency(my_data)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "plot_message_count(my_data)"
   ]
  }
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