#!/bin/bash

# This script enables proper MTP suppoert for the Nexus 4 on Ubuntu. Credit to http://bernaerts.dyndns.org/linux/247-ubuntu-automount-nexus7-mtp for the actual guide
# NO WARRANTY AT ALL! THIS MAY WORK OR NOT! THIS MAY BREAK YOUR SYSTEM OR NOT!
# - jniklast on android-hilfe.de

echo "This script will automatically configure udev and go-mtpfs for use with Nexus 4 MTP"
read -p "Although this script should, at worst, overwrite any existing 99-Nexus4-rules.d file, THERE IS ABSOLUTELY NO WARRANTY! THIS MAY NOT WORK OR EVEN BREAK YOUR SYSTEM! PLEASE PRESS Ctrl+C IF YOU DON'T KNOW WHAT YOU ARE DOING!"

if [ -e "/media/Nexus4" ]
then
echo "Mountpoint /media/Nexus4 already exists!"
echo "It seems you have already run this script! If you haven't and you know what you are doing, please rmdir /media/Nexus4 and run this script again!"
exit 1
fi


echo "Please enter your login name:"
read username
echo "Adjusting fuse.conf..."
sudo chmod a+r /etc/fuse.conf
cat /etc/fuse.conf | sed 's/\#user_allow_other/user_allow_other/' > fuse.conf
sudo mv fuse.conf /etc/fuse.conf

echo "Installing dependencies..."
sudo apt-get install libmtp-dev git golang

echo "Getting go-mtpfs..."
mkdir /tmp/go
export GOPATH=/tmp/go
go get github.com/hanwen/go-mtpfs

echo "Installing go-mtpfs..."
sudo mv /tmp/go/bin/go-mtpfs /usr/local/sbin/go-mtpfs
sudo chmod a+x /usr/local/sbin/go-mtpfs

echo "Creating mountpoint /media/Nexus4..."
sudo mkdir /media/Nexus4
sudo chmod 777 /media/Nexus4

echo "Creating udev rules..."
echo "# Google Nexus 4 16 Gb MTP mode (multimedia device)
SUBSYSTEM==\"usb\", ATTR{idVendor}==\"18d1\", ATTR{idProduct}==\"4ee1\", MODE=\"0666\" # MTP media
SUBSYSTEM==\"usb\", ATTR{idVendor}==\"18d1\", ATTR{idProduct}==\"4ee2\", MODE=\"0666\" # MTP media with USB debug on

# Google Nexus 4 MTP mode : automatic mount when plugged
ENV{ID_MODEL}==\"Nexus_4\", ENV{ID_MODEL_ID}==\"4ee1\", ACTION==\"add\", RUN+=\"/usr/bin/sudo -u $username /usr/local/sbin/go-mtpfs -allow-other=true /media/Nexus4\"
ENV{ID_MODEL}==\"Nexus_4\", ENV{ID_MODEL_ID}==\"4ee2\", ACTION==\"add\", RUN+=\"/usr/bin/sudo -u $username /usr/local/sbin/go-mtpfs -allow-other=true /media/Nexus4\"

# Google Nexus 4 MTP mode : automatic unmount when unplugged
ENV{ID_MODEL}==\"Nexus_4\", ENV{ID_MODEL_ID}==\"4ee1\", ACTION==\"remove\", RUN+=\"/bin/umount /media/Nexus4\"
ENV{ID_MODEL}==\"Nexus_4\", ENV{ID_MODEL_ID}==\"4ee2\", ACTION==\"remove\", RUN+=\"/bin/umount /media/Nexus4\" " > 99-Nexus4-rules.d
sudo mv 99-Nexus4-rules.d /etc/udev/rules.d/99-Nexus4-rules.d

echo "Restarting udev..."
sudo service udev restart

echo "Adding Nexus 4 to fstab..."
cat /etc/fstab > fstab
echo "# Nexus 4
DeviceFs(Nexus\0404)    /media/Nexus4   fuse.DeviceFs(Nexus\0404)   allow_other,rw,user,noauto  0   0" >> fstab
sudo mv fstab /etc/fstab

echo "Finished!"