From 0446ae6a093afbc72061d66c1de39a044ebc4921 Mon Sep 17 00:00:00 2001
From: Marek Baczynski <marekba@kth.se>
Date: Sat, 20 Jul 2019 22:01:25 +0200
Subject: [PATCH] first prototype

---
 data copy.json   |   1 +
 data.json        |   1 +
 inventory.py     | 178 +++++++++++++++++++++++++++++++++++++++++++++++
 static/script.js |  56 ++++++++-------
 4 files changed, 211 insertions(+), 25 deletions(-)
 create mode 100644 data copy.json
 create mode 100644 data.json
 create mode 100644 inventory.py

diff --git a/data copy.json b/data copy.json
new file mode 100644
index 0000000..33602b4
--- /dev/null
+++ b/data copy.json	
@@ -0,0 +1 @@
+[{"id": 1, "name": "Arduino Nano", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 18}, {"date": "2019-03-01", "type": "count", "value": 18}]}, {"id": 2, "name": "Arduino pro micro", "price": 5600, "events": [{"date": "2019-01-19", "type": "add", "value": 17}, {"date": "2019-03-01", "type": "count", "value": 17}]}, {"id": 3, "name": "Arduino Uno", "price": 3000, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}, {"date": "2019-06-30", "type": "count", "value": 2}, {"date": "2019-06-30", "type": "add", "value": 5}, {"date": "2019-06-30", "type": "count", "value": 0}, {"date": "2019-06-30", "type": "add", "value": 5}, {"date": "2019-06-30", "type": "add", "value": -1}]}, {"id": 4, "name": "ESP32", "price": 5000, "events": [{"date": "2019-01-19", "type": "add", "value": 2}, {"date": "2019-03-01", "type": "count", "value": 2}]}, {"id": 5, "name": "ESP8622", "price": 4000, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}, {"date": "2019-06-30", "type": "add", "value": 3}]}, {"id": 6, "name": "ESP12F", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 7, "name": "STM32 BluePill", "price": 3000, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}, {"date": "2019-06-30", "type": "add", "value": -3}]}, {"id": 8, "name": "STM32 Programmer", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 9, "name": "CSR8645", "price": 5000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 10, "name": "FTDI UART", "price": 1700, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 11, "name": "CP2102 UART", "price": 1700, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}]}, {"id": 12, "name": "microSD 4GB", "price": 2300, "events": [{"date": "2019-01-19", "type": "add", "value": 17}, {"date": "2019-03-01", "type": "count", "value": 17}]}, {"id": 13, "name": "microSD 8GB", "price": 2700, "events": [{"date": "2019-01-19", "type": "add", "value": 23}, {"date": "2019-03-01", "type": "count", "value": 23}]}, {"id": 14, "name": "Ultrasonic sensor", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 9}, {"date": "2019-03-01", "type": "count", "value": 9}]}, {"id": 15, "name": "Motion sensor", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 16, "name": "IR tracker", "price": 600, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}]}, {"id": 17, "name": "Acc/gyro/compas MPU950", "price": 3300, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 18, "name": "Laser TOF sensor", "price": 5500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}, {"date": "2019-06-30", "type": "add", "value": 5}]}, {"id": 19, "name": "Liquid level sensor", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 20, "name": "50A current sensor", "price": 5000, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 21, "name": "3A current/volt sensor", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 22, "name": "Soil moisture sensor", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 23, "name": "Sound level sensor", "price": 700, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 24, "name": "Microphone with amplifier", "price": 1800, "events": [{"date": "2019-01-19", "type": "add", "value": 9}, {"date": "2019-03-01", "type": "count", "value": 9}]}, {"id": 25, "name": "Touch sensor", "price": 300, "events": [{"date": "2019-01-19", "type": "add", "value": 27}, {"date": "2019-03-01", "type": "count", "value": 27}]}, {"id": 26, "name": "Rotary encode", "price": 1000, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}]}, {"id": 27, "name": "Vibration sensor", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 28, "name": "Relay", "price": 1400, "events": [{"date": "2019-01-19", "type": "add", "value": 11}, {"date": "2019-03-01", "type": "count", "value": 11}]}, {"id": 29, "name": "A4988 Stepper motor driver", "price": 1800, "events": [{"date": "2019-01-19", "type": "add", "value": 8}, {"date": "2019-03-01", "type": "count", "value": 8}, {"date": "2019-06-30", "type": "count", "value": 0}, {"date": "2019-06-30", "type": "add", "value": 5}, {"date": "2019-06-30", "type": "count", "value": 0}]}, {"id": 30, "name": "DRV8833 Motor driver", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 31, "name": "DFPlayer wav mp3 player", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 32, "name": "XPT8871 Amp", "price": 600, "events": [{"date": "2019-01-19", "type": "add", "value": 2}, {"date": "2019-03-01", "type": "count", "value": 2}]}, {"id": 33, "name": "PAM8403 Amp", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 14}, {"date": "2019-03-01", "type": "count", "value": 14}]}, {"id": 34, "name": "MP3 player", "price": 1500, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 35, "name": "Relay x4", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 36, "name": "Relay x8", "price": 4500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 37, "name": "Buck 5A XL4015", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 8}, {"date": "2019-03-01", "type": "count", "value": 8}]}, {"id": 38, "name": "Buck LM2576HV", "price": 3800, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}, {"date": "2019-06-30", "type": "add", "value": -3}]}, {"id": 39, "name": "Buck 1.5A", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 14}, {"date": "2019-03-01", "type": "count", "value": 14}]}, {"id": 40, "name": "Buck AXH005A0X", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 73}, {"date": "2019-03-01", "type": "count", "value": 73}]}, {"id": 41, "name": "Boost 3A", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 42, "name": "Boost 2A", "price": 600, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 43, "name": "USB 5V boost", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 44, "name": "USB Li-ion charger", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 34}, {"date": "2019-03-01", "type": "count", "value": 34}]}, {"id": 45, "name": "181650 holder", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 46, "name": "3S Battery BMS", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 47, "name": "2S Battery BMS", "price": 1000, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 48, "name": "4X AA battery", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}, {"date": "2019-06-30", "type": "add", "value": -2}]}, {"id": 49, "name": "Breadboard small", "price": 1500, "events": [{"date": "2019-01-19", "type": "add", "value": 34}, {"date": "2019-03-01", "type": "count", "value": 34}]}, {"id": 50, "name": "Breadboard large", "price": 3000, "events": [{"date": "2019-01-19", "type": "add", "value": 19}, {"date": "2019-03-01", "type": "count", "value": 19}]}, {"id": 51, "name": "Jumper 10cm 10pcs", "price": 30, "events": [{"date": "2019-01-19", "type": "add", "value": 200}, {"date": "2019-03-01", "type": "count", "value": 200}, {"date": "2019-06-30", "type": "count", "value": 0}, {"date": "2019-06-30", "type": "add", "value": 400}]}, {"id": 52, "name": "Jumper 20cm 10pcs", "price": 50, "events": [{"date": "2019-01-19", "type": "add", "value": 50}, {"date": "2019-03-01", "type": "count", "value": 50}]}, {"id": 53, "name": "SSD1306 OLED display", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 0}, {"date": "2019-03-01", "type": "count", "value": 0}]}, {"id": 54, "name": "6V 12V Cree", "price": 1000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 55, "name": "WS2812 bar", "price": 1300, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}]}, {"id": 56, "name": "Servo EMAX ES08A", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}]}, {"id": 57, "name": "Servo Hitec HS-425BB", "price": 10000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 58, "name": "Geared DC motor", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 59, "name": "XT60", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}, {"date": "2019-06-30", "type": "count", "value": 1}, {"date": "2019-06-30", "type": "add", "value": 12}]}, {"id": 60, "name": "XT30", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 9}, {"date": "2019-03-01", "type": "count", "value": 9}, {"date": "2019-06-30", "type": "count", "value": 1}, {"date": "2019-06-30", "type": "add", "value": 12}]}, {"id": 61, "name": "Mini USB", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 62, "name": "Micro USB", "price": 1500, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}, {"date": "2019-06-30", "type": "add", "value": -1}]}]
\ No newline at end of file
diff --git a/data.json b/data.json
new file mode 100644
index 0000000..33602b4
--- /dev/null
+++ b/data.json
@@ -0,0 +1 @@
+[{"id": 1, "name": "Arduino Nano", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 18}, {"date": "2019-03-01", "type": "count", "value": 18}]}, {"id": 2, "name": "Arduino pro micro", "price": 5600, "events": [{"date": "2019-01-19", "type": "add", "value": 17}, {"date": "2019-03-01", "type": "count", "value": 17}]}, {"id": 3, "name": "Arduino Uno", "price": 3000, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}, {"date": "2019-06-30", "type": "count", "value": 2}, {"date": "2019-06-30", "type": "add", "value": 5}, {"date": "2019-06-30", "type": "count", "value": 0}, {"date": "2019-06-30", "type": "add", "value": 5}, {"date": "2019-06-30", "type": "add", "value": -1}]}, {"id": 4, "name": "ESP32", "price": 5000, "events": [{"date": "2019-01-19", "type": "add", "value": 2}, {"date": "2019-03-01", "type": "count", "value": 2}]}, {"id": 5, "name": "ESP8622", "price": 4000, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}, {"date": "2019-06-30", "type": "add", "value": 3}]}, {"id": 6, "name": "ESP12F", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 7, "name": "STM32 BluePill", "price": 3000, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}, {"date": "2019-06-30", "type": "add", "value": -3}]}, {"id": 8, "name": "STM32 Programmer", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 9, "name": "CSR8645", "price": 5000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 10, "name": "FTDI UART", "price": 1700, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 11, "name": "CP2102 UART", "price": 1700, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}]}, {"id": 12, "name": "microSD 4GB", "price": 2300, "events": [{"date": "2019-01-19", "type": "add", "value": 17}, {"date": "2019-03-01", "type": "count", "value": 17}]}, {"id": 13, "name": "microSD 8GB", "price": 2700, "events": [{"date": "2019-01-19", "type": "add", "value": 23}, {"date": "2019-03-01", "type": "count", "value": 23}]}, {"id": 14, "name": "Ultrasonic sensor", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 9}, {"date": "2019-03-01", "type": "count", "value": 9}]}, {"id": 15, "name": "Motion sensor", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 16, "name": "IR tracker", "price": 600, "events": [{"date": "2019-01-19", "type": "add", "value": 7}, {"date": "2019-03-01", "type": "count", "value": 7}]}, {"id": 17, "name": "Acc/gyro/compas MPU950", "price": 3300, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 18, "name": "Laser TOF sensor", "price": 5500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}, {"date": "2019-06-30", "type": "add", "value": 5}]}, {"id": 19, "name": "Liquid level sensor", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 20, "name": "50A current sensor", "price": 5000, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 21, "name": "3A current/volt sensor", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 22, "name": "Soil moisture sensor", "price": 2500, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 23, "name": "Sound level sensor", "price": 700, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 24, "name": "Microphone with amplifier", "price": 1800, "events": [{"date": "2019-01-19", "type": "add", "value": 9}, {"date": "2019-03-01", "type": "count", "value": 9}]}, {"id": 25, "name": "Touch sensor", "price": 300, "events": [{"date": "2019-01-19", "type": "add", "value": 27}, {"date": "2019-03-01", "type": "count", "value": 27}]}, {"id": 26, "name": "Rotary encode", "price": 1000, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}]}, {"id": 27, "name": "Vibration sensor", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 28, "name": "Relay", "price": 1400, "events": [{"date": "2019-01-19", "type": "add", "value": 11}, {"date": "2019-03-01", "type": "count", "value": 11}]}, {"id": 29, "name": "A4988 Stepper motor driver", "price": 1800, "events": [{"date": "2019-01-19", "type": "add", "value": 8}, {"date": "2019-03-01", "type": "count", "value": 8}, {"date": "2019-06-30", "type": "count", "value": 0}, {"date": "2019-06-30", "type": "add", "value": 5}, {"date": "2019-06-30", "type": "count", "value": 0}]}, {"id": 30, "name": "DRV8833 Motor driver", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 31, "name": "DFPlayer wav mp3 player", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 32, "name": "XPT8871 Amp", "price": 600, "events": [{"date": "2019-01-19", "type": "add", "value": 2}, {"date": "2019-03-01", "type": "count", "value": 2}]}, {"id": 33, "name": "PAM8403 Amp", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 14}, {"date": "2019-03-01", "type": "count", "value": 14}]}, {"id": 34, "name": "MP3 player", "price": 1500, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 35, "name": "Relay x4", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 36, "name": "Relay x8", "price": 4500, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 37, "name": "Buck 5A XL4015", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 8}, {"date": "2019-03-01", "type": "count", "value": 8}]}, {"id": 38, "name": "Buck LM2576HV", "price": 3800, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}, {"date": "2019-06-30", "type": "add", "value": -3}]}, {"id": 39, "name": "Buck 1.5A", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 14}, {"date": "2019-03-01", "type": "count", "value": 14}]}, {"id": 40, "name": "Buck AXH005A0X", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 73}, {"date": "2019-03-01", "type": "count", "value": 73}]}, {"id": 41, "name": "Boost 3A", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 42, "name": "Boost 2A", "price": 600, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 43, "name": "USB 5V boost", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 12}, {"date": "2019-03-01", "type": "count", "value": 12}]}, {"id": 44, "name": "USB Li-ion charger", "price": 1200, "events": [{"date": "2019-01-19", "type": "add", "value": 34}, {"date": "2019-03-01", "type": "count", "value": 34}]}, {"id": 45, "name": "181650 holder", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 46, "name": "3S Battery BMS", "price": 2000, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}]}, {"id": 47, "name": "2S Battery BMS", "price": 1000, "events": [{"date": "2019-01-19", "type": "add", "value": 5}, {"date": "2019-03-01", "type": "count", "value": 5}]}, {"id": 48, "name": "4X AA battery", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}, {"date": "2019-06-30", "type": "add", "value": -2}]}, {"id": 49, "name": "Breadboard small", "price": 1500, "events": [{"date": "2019-01-19", "type": "add", "value": 34}, {"date": "2019-03-01", "type": "count", "value": 34}]}, {"id": 50, "name": "Breadboard large", "price": 3000, "events": [{"date": "2019-01-19", "type": "add", "value": 19}, {"date": "2019-03-01", "type": "count", "value": 19}]}, {"id": 51, "name": "Jumper 10cm 10pcs", "price": 30, "events": [{"date": "2019-01-19", "type": "add", "value": 200}, {"date": "2019-03-01", "type": "count", "value": 200}, {"date": "2019-06-30", "type": "count", "value": 0}, {"date": "2019-06-30", "type": "add", "value": 400}]}, {"id": 52, "name": "Jumper 20cm 10pcs", "price": 50, "events": [{"date": "2019-01-19", "type": "add", "value": 50}, {"date": "2019-03-01", "type": "count", "value": 50}]}, {"id": 53, "name": "SSD1306 OLED display", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 0}, {"date": "2019-03-01", "type": "count", "value": 0}]}, {"id": 54, "name": "6V 12V Cree", "price": 1000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 55, "name": "WS2812 bar", "price": 1300, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}]}, {"id": 56, "name": "Servo EMAX ES08A", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 6}, {"date": "2019-03-01", "type": "count", "value": 6}]}, {"id": 57, "name": "Servo Hitec HS-425BB", "price": 10000, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 58, "name": "Geared DC motor", "price": 3500, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}]}, {"id": 59, "name": "XT60", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 4}, {"date": "2019-03-01", "type": "count", "value": 4}, {"date": "2019-06-30", "type": "count", "value": 1}, {"date": "2019-06-30", "type": "add", "value": 12}]}, {"id": 60, "name": "XT30", "price": 500, "events": [{"date": "2019-01-19", "type": "add", "value": 9}, {"date": "2019-03-01", "type": "count", "value": 9}, {"date": "2019-06-30", "type": "count", "value": 1}, {"date": "2019-06-30", "type": "add", "value": 12}]}, {"id": 61, "name": "Mini USB", "price": 800, "events": [{"date": "2019-01-19", "type": "add", "value": 10}, {"date": "2019-03-01", "type": "count", "value": 10}]}, {"id": 62, "name": "Micro USB", "price": 1500, "events": [{"date": "2019-01-19", "type": "add", "value": 3}, {"date": "2019-03-01", "type": "count", "value": 3}, {"date": "2019-06-30", "type": "add", "value": -1}]}]
\ No newline at end of file
diff --git a/inventory.py b/inventory.py
new file mode 100644
index 0000000..a63fb12
--- /dev/null
+++ b/inventory.py
@@ -0,0 +1,178 @@
+import json, csv, datetime, copy
+import requests
+from flask import Flask
+from flask import render_template, send_from_directory, request, Response, send_file, session
+app = Flask(__name__)
+
+class Item():
+    items = {}
+    def __init__(self, name, price, itemid=None):
+        self.id = itemid if itemid != None else 0
+        self.name = name
+        self.price = price
+        self.events = []
+        Item.items[self.id] = self
+
+    def newEvent(self, type, value, date=None):
+        event = {}
+        if date==None:
+            # date = datetime.datetime.now().strftime('%Y-%m-%d')
+            print ("no date given, using now")
+            date = datetime.datetime.now()
+        event['date'] = date
+        event['type'] = type
+        event['value'] = value
+        self.events.append(event)
+
+    def recount(self, count, date=None):
+        if count < 0:
+            return False
+        self.newEvent('count', count, date)
+        Item.fileSave()
+        return True
+
+    def add(self, count, date=None):
+        self.newEvent('add', count, date)
+        Item.fileSave()
+        return True
+
+    def howMany(self):
+        count = 0
+        for event in self.events:
+            if event['type']=='add':
+                count += event['value']
+            if event['type']=='count':
+                count = event['value']
+        return count
+
+    def countSold(self, fromDate=None, verbose=False):
+        count = 0
+        totalSold = 0
+        lastDate = 'the start'
+        for event in self.events:
+            if event['type']=='add':
+                count += event['value']
+            if event['type']=='count':
+                newCount = event['value']
+                if newCount<count:
+                    sold = count - newCount
+                    totalSold += sold
+                    if verbose:
+                        print("sold {} between {} and {}".format(sold, lastDate, event['date'].strftime('%Y-%m-%d')))
+                    lastDate = event['date']
+                count = newCount
+        return totalSold
+    
+    def soldValue(self, fromDate=None):
+        return self.countSold() * self.price
+
+    @staticmethod
+    def fileSave():
+        fileContent = []
+        for key, item in Item.items.items():
+            itemEntity = {}
+            itemEntity['id'] = item.id
+            itemEntity['name'] = item.name
+            itemEntity['price'] = item.price
+            itemEntity['events'] = copy.deepcopy(item.events)
+            for event in itemEntity['events']:
+                event['date'] = event['date'].strftime('%Y-%m-%d')
+            fileContent.append(itemEntity)
+        with open('data.json', 'w') as outfile:
+            json.dump(fileContent, outfile)
+            print ("Saved to file.")
+
+    @staticmethod
+    def fileLoad():
+        with open('data.json', 'r') as f:
+            fileContent = json.load(f)
+            for itemEntry in fileContent:
+                item = Item(itemEntry['name'], itemEntry['price'], itemid=itemEntry['id'])
+                for event in itemEntry['events']:
+                    item.newEvent(event['type'], event['value'], datetime.datetime.strptime(event['date'], '%Y-%m-%d'))
+        print ("Loaded from file")
+
+@app.route('/')
+def index():
+    return render_template('inventory.html')
+
+@app.route('/recount', methods=['POST'])
+def recount():
+    if 'id' not in request.form or 'count' not in request.form:
+        return "bad request"
+    itemid = int(request.form['id'])
+    count = int(request.form['count'])
+    if itemid in Item.items:
+        if Item.items[itemid].recount(count):
+            return 'ok'
+        else:
+            return 'error'
+    else:
+        return 'item not found'
+
+@app.route('/restock', methods=['POST'])
+def restock():
+    if 'id' not in request.form or 'count' not in request.form:
+        return "bad request"
+    itemid = int(request.form['id'])
+    count = int(request.form['count'])
+    if itemid in Item.items:
+        if Item.items[itemid].add(count):
+            return 'ok'
+        else:
+            return 'error'
+    else:
+        return 'item not found'
+
+@app.route('/getdata')
+def data():
+    jsonContent = []
+    for key, item in Item.items.items():
+        itemEntity = {}
+        itemEntity['id'] = item.id
+        itemEntity['name'] = item.name
+        itemEntity['price'] = str(item.price/100) + '.00'
+        itemEntity['quantity'] = item.howMany()
+        jsonContent.append(itemEntity)
+    return json.dumps(jsonContent)
+
+@app.route('/salestats/<startDate>')
+def saleStats(startDate = 0):
+    if startDate !=0:
+        try:
+            startDate = datetime.datetime.strptime(startDate, '%Y-%m-%d')
+        except:
+            return "invalid date format"
+    jsonContent = {}
+    jsonContent['totalCount'] = 0
+    jsonContent['totalValue'] = 0
+    itemTable = []
+    for key, item in Item.items.items():
+        itemEntity = {}
+        itemEntity['id'] = item.id
+        itemEntity['name'] = item.name
+        itemEntity['price'] = str(item.price/100) + '.00'
+        if startDate != 0:
+            itemEntity['soldQuantity'] = item.countSold(startDate)
+        else:
+            itemEntity['soldQuantity'] = item.countSold()
+        itemEntity['soldValue'] = str(itemEntity['soldQuantity'] * item.price / 100) + '.00'
+        jsonContent['totalCount'] += itemEntity['soldQuantity']
+        jsonContent['totalValue'] += itemEntity['soldQuantity'] * item.price/100
+        itemTable.append(itemEntity)
+    jsonContent['items'] = itemTable
+    jsonContent['startDate'] = startDate.strftime('%Y-%m-%d') if startDate != 0 else "2018-09-01"
+    jsonContent['endDate'] = datetime.datetime.now().strftime('%Y-%m-%d')
+    return json.dumps(jsonContent)
+
+
+@app.route('/salestats')
+def saleStatsNoDate():
+    return saleStats()
+
+if __name__ == '__main__':
+    # app.secret_key = 'asuiygdiahsdo[ainsfl]asfkjnb;asklnj'
+    # app.config['SESSION_TYPE'] = 'memcached'
+    print("is this the work?")
+    Item.fileLoad()
+    app.run('0.0.0.0')
diff --git a/static/script.js b/static/script.js
index 7bf25b0..b3cd321 100644
--- a/static/script.js
+++ b/static/script.js
@@ -3,24 +3,7 @@ var data_filtered = [];
 var current_selection = -1;
 var is_editing = false;
 
-data = [
-    {
-        id : 1,
-        name : "Arduino",
-        price : 25,
-        quantity : 4
-    }, {
-        id : 2,
-        name : "Buck converter",
-        price : 30,
-        quantity : 6
-    }, {
-        id : 3,
-        name : "Line driver",
-        price : 10,
-        quantity : 12
-    }
-]
+data = []
 
 function populate_table(data) {
     data.forEach(function(d) {
@@ -61,10 +44,21 @@ function recount_confirm(id, previous_value) {
     $('#inventory-item-' + id + ' > #item-recount > div').text('Recount');
     $('#inventory-item-' + id + ' > #item-recount > div').attr('onclick', 'recount(' + id + ')')
     $('#inventory-item-' + id + ' > #item-quantity').empty();
-    // TODO: Perform ajax to set new quantity
+   
     // If you got an ok:
     if (quantity.length > 0) {
+        data = {};
+        data['id'] = id;
+        data['count'] = quantity;
         $('#inventory-item-' + id + ' > #item-quantity').text(quantity);
+         $.post( "recount", data,  function( data ) {
+            if(data=="ok"){
+                //nothing on success
+            }else{
+                alert("Something went wrong :(");
+                $('#inventory-item-' + id + ' > #item-quantity').text(previous_value);
+            }
+         });
         // TODO: Also refresh the 'data' array
     } else {
         $('#inventory-item-' + id + ' > #item-quantity').text(previous_value);
@@ -100,12 +94,22 @@ function restock_confirm(id) {
     $('#inventory-item-' + id + ' > #item-restock > div').removeClass('button-confirm');
     $('#inventory-item-' + id + ' > #item-restock > div').text('Restock');
     $('#inventory-item-' + id + ' > #item-restock > div').attr('onclick', 'restock(' + id + ')');
-    // TODO: Perform ajax to send restock info
+   
     // If you got an ok:
+    data = {};
+    data['id'] = id;
+    data['count'] = quantity;
     var previous_q = parseInt($('#inventory-item-' + id + ' > #item-quantity').text());
     if (quantity.length > 0) {
         $('#inventory-item-' + id + ' > #item-quantity').text(previous_q + parseInt(quantity));
-        // TODO: Also refresh the 'data' array
+        $.post( "restock", data,  function( data ) {
+            if(data=="ok"){
+                //nothing on success
+            }else{
+                alert("Something went wrong :(");
+                $('#inventory-item-' + id + ' > #item-quantity').text(previous_q);
+            }
+        })
     } else {
         $('#inventory-item-' + id + ' > #item-quantity').text(previous_q);
     }
@@ -152,10 +156,12 @@ function default_keypress_handler(e) {
 }
 
 $( document ).ready(function(){
-    // $.getJSON( "ajax/test.json", function( data ) {
-        populate_table(data);
-        data_filtered = data;
-    // });
+    $.getJSON( "getdata", function( result ) {
+        populate_table(result);
+        data_filtered = result;
+        data=result;
+    });
+
 
     $('#filter-textbox').on('keyup', function() {
         data_filtered = []