.functions

#!bin/bash

# This file constains some functions I've created using a bash script for my zsh 
# terminal.
#
# More information at: github.com/pblcc/dotfiles
#
# Follow me on Twitter: @pablcorbcon


# This function acts as a simple calculator, so that I don't have to open my
# calculator to calculate basic operations.
#
# Usage:
#   calc number1 operation number2
calc() {
  local result=""
  result="$(printf "scale=10;%s\\n" "$*" | bc --mathlib | tr -d '\\\n')"
  if [[ "$result" == *.* ]]; then
  printf "%s" "$result" |
    sed -e 's/^\./0./'  \
    -e 's/^-\./-0./' \
    -e 's/0*$//;s/\.$//'
  else
    printf "%s" "$result"
  fi
  printf "\\n"
}

# Source a configuration file (allways a dotfile) located at ~
#
# Usage:
#   config file
#
# Example
#   config zshrc == soure ~/.zshrc
config(){
  source "$HOME/.$1"
}

# Get the colors of the manual pages
#
# Usage:
#   man <command>
man() {
  env \
    LESS_TERMCAP_mb="$(printf '\e[1;31m')" \
    LESS_TERMCAP_md="$(printf '\e[1;31m')" \
    LESS_TERMCAP_me="$(printf '\e[0m')" \
    LESS_TERMCAP_se="$(printf '\e[0m')" \
    LESS_TERMCAP_so="$(printf '\e[1;44;33m')" \
    LESS_TERMCAP_ue="$(printf '\e[0m')" \
    LESS_TERMCAP_us="$(printf '\e[1;32m')" \
    man "$@"
}

# Query the wikipedia from the terminal to see the texts in the screen.
#
# Usage:
#   wiki <words>
#
# Example:
#   wiki Python programming language
wiki() {
  if ! [ -x "$(command -v links)" ]; then
    echo "Links package is not installed"
    sudo apt install links
  fi
  if ! [ -x "$(command -v wikipedia2text)" ]; then
    echo "Wikipedia to text is not installed"
    sudo apt-get install wikipedia2text
  fi
  wikipedia2text -p "$*"
}

# Create a new directory and move inside it
m() {
  mkdir -p "$@"
  cd "$@" || exit
}


# Determine tthe size of a file or the total size of a directory
# to avoid complex commands
#
# Usage:
#   fs [directory][file]
fs() {
  if du -b /dev/null > /dev/null 2>&1; then
    local arg=-sbh
  else
    local arg=-sh
  fi
  if [[ -n "$@" ]]; then
    du $arg -- "$@"
  else
    du $arg -- .[^.]* *
  fi
}

# Start an HTTP server from a directory, optionally specifying 
# the port of it
start-server(){
  local port="${1:-8000}"
  sleep 1
  open "https://localhost:$port/"
  # check if python is installed and open a socket on it. 
  if ! [[ -x "$(command -v python3)" ]]; then
    echo "Python is not installed"
    exit 1
  fi
	python -c $'\
import SimpleHTTPServer;\
map = SimpleHTTPServer.SimpleHTTPRequestHandler.extensions_map;\
map[""] = "text/plain";\
for key, value in map.items():\
  map[key] = value + ";charset=UTF-8";\
SimpleHTTPServer.test();' "$port"
}

# Run dig and display the most usefull information
#
# Usage:
#   digga <words>
digga(){
  dig +nocmd "$1" any +multiline +noall +answer
}

# `tre` is a shorthand for `tree` with hidden files and color enabled, ignoring
# the `.git` directory, listing directories first. The output gets piped into
# `less` with options to preserve color and line numbers, unless the output is
# small enough for one screen.
tre() {
	tree -aC -I '.git' --dirsfirst "$@" | less -FRNX
}

# This function is used for adding an alias to the .zshrc file. Then it will restart 
# ZSH to execute the alias.
#
# Usage: addalias name "command of the alias"
addalias() {
  filename="$HOME/alias.zsh"
  echo "alias $1='$2'" | tee -a $filename > /dev/null
  source "$filename"
}

# Is used to format a given location
format() {
  umount "$1"
  mkfs.vfat "$1"
}

# Moves to an specific project (located at $1), all
# the projects are located in the ~/projects/ folder
projects() {
  cd ~/projects/$1
  ls -la
}