#!/bin/bash

#=================================================
# COMMON VARIABLES
#=================================================
# dependencies used by the app
YNH_PHP_VERSION="7.4"

extra_php_dependencies="php${YNH_PHP_VERSION}-sqlite3 hp${YNH_PHP_VERSION}-gd php${YNH_PHP_VERSION}-imagick php${YNH_PHP_VERSION}-imap php${YNH_PHP_VERSION}-intl  php${YNH_PHP_VERSION}-cli"

#=================================================
# PERSONAL HELPERS
#=================================================

#=================================================
# EXPERIMENTAL HELPERS
#=================================================
# Install another version of php.
#
# usage: ynh_install_php --phpversion=phpversion [--package=packages]
# | arg: -v, --phpversion - Version of php to install.
# | arg: -p, --package - Additionnal php packages to install
ynh_install_php () {
  # Declare an array to define the options of this helper.
  local legacy_args=vp
  declare -Ar args_array=( [v]=phpversion= [p]=package= )
  local phpversion
  local package
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  package=${package:-}

  # Store phpversion into the config of this app
  ynh_app_setting_set $app phpversion $phpversion

  if [ "$phpversion" == "7.3" ]
  then
    ynh_die "Do not use ynh_install_php to install php7.3"
  fi

  # Store the ID of this app and the version of php requested for it
  echo "$YNH_APP_INSTANCE_NAME:$phpversion" | tee --append "/etc/php/ynh_app_version"
  # Add an extra repository for those packages
  ynh_install_extra_repo --repo="https://packages.sury.org/php/ $(lsb_release -sc) main" --key="https://packages.sury.org/php/apt.gpg" --priority=995 --name=extra_php_version

  # Install requested dependencies from this extra repository.
  # Install php-fpm first, otherwise php will install apache as a dependency.
  ynh_add_app_dependencies --package="php${phpversion}-fpm"
  ynh_add_app_dependencies --package="php$phpversion php${phpversion}-common $package"

  # Set php7.3 back as the default version for php-cli.
  update-alternatives --set php /usr/bin/php7.3

  # Pin this extra repository after packages are installed to prevent sury of doing shit
  ynh_pin_repo --package="*" --pin="origin \"packages.sury.org\"" --priority=200 --name=extra_php_version
  ynh_pin_repo --package="php7.3*" --pin="origin \"packages.sury.org\"" --priority=600 --name=extra_php_version --append
  # Advertise service in admin panel
  yunohost service add php${phpversion}-fpm --log "/var/log/php${phpversion}-fpm.log"
}
# Remove the specific version of php used by the app.
#
# usage: ynh_install_php
ynh_remove_php () {
  # Get the version of php used by this app
  local phpversion=$(ynh_app_setting_get $app phpversion)
  if [ "$phpversion" == "7.3" ] || [ -z "$phpversion" ]
  then
    if [ "$phpversion" == "7.3" ]
    then
      ynh_print_err "Do not use ynh_remove_php to install php7.3"
    fi
    return 0
  fi
  # Remove the line for this app
  sed --in-place "/$YNH_APP_INSTANCE_NAME:$phpversion/d" "/etc/php/ynh_app_version"
  # If no other app uses this version of php, remove it.
  if ! grep --quiet "$phpversion" "/etc/php/ynh_app_version"
  then
    # Purge php dependences for this version.
    ynh_package_autopurge "php$phpversion php${phpversion}-fpm php${phpversion}-common"
    # Remove the service from the admin panel
    yunohost service remove php${phpversion}-fpm
  fi
  # If no other app uses alternate php versions, remove the extra repo for php
  if [ ! -s "/etc/php/ynh_app_version" ]
  then
    ynh_secure_remove /etc/php/ynh_app_version
  fi
}
#=================================================
# FUTURE OFFICIAL HELPERS
#=================================================
# Pin a repository.
#
# usage: ynh_pin_repo --package=packages --pin=pin_filter [--priority=priority_value] [--name=name] [--append]
# | arg: -p, --package - Packages concerned by the pin. Or all, *.
# | arg: -i, --pin - Filter for the pin.
# | arg: -p, --priority - Priority for the pin
# | arg: -n, --name - Name for the files for this repo, $app as default value.
# | arg: -a, --append - Do not overwrite existing files.
#
# See https://manpages.debian.org/stretch/apt/apt_preferences.5.en.html for information about pinning.
#
ynh_pin_repo () {
  # Declare an array to define the options of this helper.
  local legacy_args=pirna
  declare -Ar args_array=( [p]=package= [i]=pin= [r]=priority= [n]=name= [a]=append )
  local package
  local pin
  local priority
  local name
  local append
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  package="${package:-*}"
  priority=${priority:-50}
  name="${name:-$app}"
  append=${append:-0}
  if [ $append -eq 1 ]
  then
    append="tee -a"
  else
    append="tee"
  fi
  mkdir -p "/etc/apt/preferences.d"
  echo "Package: $package
Pin: $pin
Pin-Priority: $priority
" \
  | $append "/etc/apt/preferences.d/$name"
}

# Add a repository.
#
# usage: ynh_add_repo --uri=uri --suite=suite --component=component [--name=name] [--append]
# | arg: -u, --uri - Uri of the repository.
# | arg: -s, --suite - Suite of the repository.
# | arg: -c, --component - Component of the repository.
# | arg: -n, --name - Name for the files for this repo, $app as default value.
# | arg: -a, --append - Do not overwrite existing files.
#
# Example for a repo like deb http://forge.yunohost.org/debian/ stretch stable
#                             uri                               suite   component
# ynh_add_repo --uri=http://forge.yunohost.org/debian/ --suite=stretch --component=stable
#
ynh_add_repo () {
  # Declare an array to define the options of this helper.
  local legacy_args=uscna
  declare -Ar args_array=( [u]=uri= [s]=suite= [c]=component= [n]=name= [a]=append )
  local uri
  local suite
  local component
  local name
  local append
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  name="${name:-$app}"
  append=${append:-0}
  if [ $append -eq 1 ]
  then
    append="tee -a"
  else
    append="tee"
  fi
  mkdir -p "/etc/apt/sources.list.d"
  # Add the new repo in sources.list.d
  echo "deb $uri $suite $component" \
    | $append "/etc/apt/sources.list.d/$name.list"
}
# Add an extra repository correctly, pin it and get the key.
#
# usage: ynh_install_extra_repo --repo="repo" [--key=key_url] [--priority=priority_value] [--name=name] [--append]
# | arg: -r, --repo - Complete url of the extra repository.
# | arg: -k, --key - url to get the public key.
# | arg: -p, --priority - Priority for the pin
# | arg: -n, --name - Name for the files for this repo, $app as default value.
# | arg: -a, --append - Do not overwrite existing files.
ynh_install_extra_repo () {
  # Declare an array to define the options of this helper.
  local legacy_args=rkpna
  declare -Ar args_array=( [r]=repo= [k]=key= [p]=priority= [n]=name= [a]=append )
  local repo
  local key
  local priority
  local name
  local append
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  name="${name:-$app}"
  append=${append:-0}
  key=${key:-0}
  priority=${priority:-}
  if [ $append -eq 1 ]
  then
    append="--append"
    wget_append="tee -a"
  else
    append=""
    wget_append="tee"
  fi
  # Split the repository into uri, suite and components.
  # Remove "deb " at the beginning of the repo.
  repo="${repo#deb }"
  # Get the uri
  local uri="$(echo "$repo" | awk '{ print $1 }')"
  # Get the suite
  local suite="$(echo "$repo" | awk '{ print $2 }')"
  # Get the components
  local component="${repo##$uri $suite }"
  # Add the repository into sources.list.d
  ynh_add_repo --uri="$uri" --suite="$suite" --component="$component" --name="$name" $append
  # Pin the new repo with the default priority, so it won't be used for upgrades.
  # Build $pin from the uri without http and any sub path
  local pin="${uri#*://}"
  pin="${pin%%/*}"
  # Set a priority only if asked
  if [ -n "$priority" ]
  then
    priority="--priority=$priority"
  fi
  ynh_pin_repo --package="*" --pin="origin \"$pin\"" $priority --name="$name" $append
  # Get the public key for the repo
  if [ -n "$key" ]
  then
    mkdir -p "/etc/apt/trusted.gpg.d"
    wget -q "$key" -O - | gpg --dearmor | $wget_append /etc/apt/trusted.gpg.d/$name.gpg > /dev/null
  fi
  # Update the list of package with the new repo
  ynh_package_update
}
# Remove an extra repository and the assiociated configuration.
#
# usage: ynh_remove_extra_repo [--name=name]
# | arg: -n, --name - Name for the files for this repo, $app as default value.
ynh_remove_extra_repo () {
  # Declare an array to define the options of this helper.
  local legacy_args=n
  declare -Ar args_array=( [n]=name= )
  local name
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  name="${name:-$app}"
  ynh_secure_remove "/etc/apt/sources.list.d/$name.list"
  ynh_secure_remove "/etc/apt/preferences.d/$name"
  ynh_secure_remove "/etc/apt/trusted.gpg.d/$name.gpg"
  ynh_secure_remove "/etc/apt/trusted.gpg.d/$name.asc"
  # Update the list of package to exclude the old repo
  ynh_package_update
}
# Install packages from an extra repository properly.
#
# usage: ynh_install_extra_app_dependencies --repo="repo" --package="dep1 dep2" [--key=key_url] [--name=name]
# | arg: -r, --repo - Complete url of the extra repository.
# | arg: -p, --package - The packages to install from this extra repository
# | arg: -k, --key - url to get the public key.
# | arg: -n, --name - Name for the files for this repo, $app as default value.
ynh_install_extra_app_dependencies () {
  # Declare an array to define the options of this helper.
  local legacy_args=rpkn
  declare -Ar args_array=( [r]=repo= [p]=package= [k]=key= [n]=name= )
  local repo
  local package
  local key
  local name
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  name="${name:-$app}"
  key=${key:-0}
  # Set a key only if asked
  if [ -n "$key" ]
  then
    key="--key=$key"
  fi
  # Add an extra repository for those packages
  ynh_install_extra_repo --repo="$repo" $key --priority=995 --name=$name
  # Install requested dependencies from this extra repository.
  ynh_add_app_dependencies --package="$package"
  # Remove this extra repository after packages are installed
  ynh_remove_extra_repo --name=$app
}
#=================================================
# patched version of ynh_install_app_dependencies to be used with ynh_add_app_dependencies
# Define and install dependencies with a equivs control file
# This helper can/should only be called once per app
#
# usage: ynh_install_app_dependencies dep [dep [...]]
# | arg: dep - the package name to install in dependence
#   You can give a choice between some package with this syntax : "dep1|dep2"
#   Example : ynh_install_app_dependencies dep1 dep2 "dep3|dep4|dep5"
#   This mean in the dependence tree : dep1 & dep2 & (dep3 | dep4 | dep5)
#
# Requires YunoHost version 2.6.4 or higher.
ynh_install_app_dependencies () {
    local dependencies=$@
    dependencies="$(echo "$dependencies" | sed 's/\([^\<=\>]\)\ \([^(]\)/\1, \2/g')"
    dependencies=${dependencies//|/ | }
    local manifest_path="../manifest.json"
    if [ ! -e "$manifest_path" ]; then
      manifest_path="../settings/manifest.json" # Into the restore script, the manifest is not at the same place
    fi
    local version=$(grep '\"version\": ' "$manifest_path" | cut -d '"' -f 4)  # Retrieve the version number in the manifest file.
    if [ ${#version} -eq 0 ]; then
        version="1.0"
    fi
    local dep_app=${app//_/-} # Replace all '_' by '-'
    # Handle specific versions
    if [[ "$dependencies" =~ [\<=\>] ]]
    then
        # Replace version specifications by relationships syntax
        # https://www.debian.org/doc/debian-policy/ch-relationships.html
        # Sed clarification
        # [^(\<=\>] ignore if it begins by ( or < = >. To not apply twice.
        # [\<=\>] matches < = or >
        # \+ matches one or more occurence of the previous characters, for >= or >>.
        # [^,]\+ matches all characters except ','
        # Ex: package>=1.0 will be replaced by package (>= 1.0)
        dependencies="$(echo "$dependencies" | sed 's/\([^(\<=\>]\)\([\<=\>]\+\)\([^,]\+\)/\1 (\2 \3)/g')"
    fi
    cat > /tmp/${dep_app}-ynh-deps.control << EOF # Make a control file for equivs-build
Section: misc
Priority: optional
Package: ${dep_app}-ynh-deps
Version: ${version}
Depends: ${dependencies}
Architecture: all
Description: Fake package for $app (YunoHost app) dependencies
 This meta-package is only responsible of installing its dependencies.
EOF
    ynh_package_install_from_equivs /tmp/${dep_app}-ynh-deps.control \
        || ynh_die --message="Unable to install dependencies" # Install the fake package and its dependencies
    rm /tmp/${dep_app}-ynh-deps.control
    ynh_app_setting_set --app=$app --key=apt_dependencies --value="$dependencies"
}
ynh_add_app_dependencies () {
  # Declare an array to define the options of this helper.
  local legacy_args=pr
  declare -Ar args_array=( [p]=package= [r]=replace)
  local package
  local replace
  # Manage arguments with getopts
  ynh_handle_getopts_args "$@"
  replace=${replace:-0}
  local current_dependencies=""
  if [ $replace -eq 0 ]
  then
    local dep_app=${app//_/-} # Replace all '_' by '-'
    if ynh_package_is_installed --package="${dep_app}-ynh-deps"
    then
      current_dependencies="$(dpkg-query --show --showformat='${Depends}' ${dep_app}-ynh-deps) "
    fi
    current_dependencies=${current_dependencies// | /|}
  fi
  ynh_install_app_dependencies "${current_dependencies}${package}"
}
#=================================================
# FUTURE OFFICIAL HELPERS
#=================================================

#=================================================
# FUTURE OFFICIAL HELPERS
#=================================================