diff --git a/type/__nextcloud/explorer/config b/type/__nextcloud/explorer/config
new file mode 100755
index 0000000..998264e
--- /dev/null
+++ b/type/__nextcloud/explorer/config
@@ -0,0 +1,28 @@
+#!/bin/sh -e
+# __nextcloud/explorer/config
+
+# Checks the nextcloud configuration
+
+
+# Get the installdir
+user="$( cat "$__object/parameter/user" )"
+installdir="$( "$__type_explorer/installdir" )"
+
+# Check if the tools are available
+if [ -d "$installdir" ]; then
+    cd "$installdir"
+
+    # if those files exist, everything should be good
+    if [ -f "occ" ] && [ -f "config/config.php" ]; then
+        # dump out config instead of fuzz every possible option through
+        # `occ config:system:get`. Or parse through the whole json or
+        # yaml-like output of `occ config:list system --private`.
+        php -r 'require("lib/private/Config.php"); $config = new OC\Config("config/");
+                function printv($key, $value) {printf("%s = %s\n", $key, $value);}
+                foreach($config->getKeys() as $key){
+                    $value = $config->getValue($key);
+                    if(is_array($value)) foreach($value as $n => $in) printv($n."|".$key, $in);
+                    else printv($key, $value);
+                };'
+    fi
+fi
diff --git a/type/__nextcloud/explorer/installdir b/type/__nextcloud/explorer/installdir
new file mode 100755
index 0000000..7b34f2e
--- /dev/null
+++ b/type/__nextcloud/explorer/installdir
@@ -0,0 +1,16 @@
+#!/bin/sh -e
+# __nextcloud/explorer/installdir
+
+# Detects the directory nextcloud should be installed to.
+
+
+# by parameter or auto-detection
+webroot="$( "$__type_explorer/webroot" )"
+if [ -z "$webroot" ]; then
+    echo "no installdir given and no webroot directory found" >&2
+    echo "no place to install found; set it via --webroot" >&2
+    exit 1
+fi
+
+# assemble directory with the object id
+printf "%s/%s\n" "$webroot" "$__object_id"
diff --git a/type/__nextcloud/explorer/version b/type/__nextcloud/explorer/version
new file mode 100755
index 0000000..fc79206
--- /dev/null
+++ b/type/__nextcloud/explorer/version
@@ -0,0 +1,19 @@
+#!/bin/sh -e
+# __nextcloud/explorer/version
+
+# Check the currently installed version. Outputs nothing if nothing found.
+
+
+# Get the install directory
+installdir="$( "$__type_explorer/installdir" )"
+
+# Check if the installation directory exists
+if [ -d "$installdir" ]; then
+    cd "$installdir"
+
+    # if those files exist, everything should be good
+    if [ -f "occ" ] && [ -f "version.php" ]; then
+        # detect php version with the version file
+        php -r 'require("version.php"); print($OC_VersionString);'
+    fi
+fi
diff --git a/type/__nextcloud/explorer/webroot b/type/__nextcloud/explorer/webroot
new file mode 100755
index 0000000..7eab286
--- /dev/null
+++ b/type/__nextcloud/explorer/webroot
@@ -0,0 +1,34 @@
+#!/bin/sh -e
+# __nextcloud/explorer/webroot
+
+# Detects the webroot if any
+
+
+# Just check if there is some directory and echo + exit on success
+#
+# Arguments:
+#  1: the directory to check
+check_dir() {
+    if [ -d "$1" ]; then
+        echo "$1"
+        exit
+    fi
+}
+
+
+# Check the user choice
+parameter="$__object/parameter/webroot"
+if [ -f "$parameter" ]; then
+    cat "$parameter"
+    exit
+fi
+
+# Maybe checking standard webserver configs ..
+
+# Check if there are default directories
+check_dir "/srv/www"
+check_dir "/var/www/html"
+check_dir "/var/www"
+
+
+# do nothing if no webroot found
diff --git a/type/__nextcloud/gencode-remote b/type/__nextcloud/gencode-remote
new file mode 100755
index 0000000..60d9b42
--- /dev/null
+++ b/type/__nextcloud/gencode-remote
@@ -0,0 +1,209 @@
+#!/bin/sh -e
+# __nextcloud/gencode-remote
+
+# Install if not installed
+
+# Legacy:
+# curl -sS -L '$nextcloud_uri' | tar xj --strip-components=1 nextcloud/
+
+
+# Call the nextcloud occ script as the designed user. Maybe this can be a bit
+# more effictive with user switching, but currently the easiest way of doing
+# it.
+#
+# All arguments are directly passed to occ (injection alarm ;-) )
+occ() {
+    # su creates a new shell, so it does not affect the current session
+    #  will not use -q as it supresses errors, too
+    cat << SHELL
+su -s /bin/sh -l "$user" -- -e <<SU
+cd '$installdir' && php occ --no-interaction $@
+SU
+SHELL
+}
+
+# Get existing versions
+version_is="$( cat "$__object/explorer/version" )"
+version_should="$( cat "$__object/parameter/version" )"
+
+# the install directory
+installdir="$( cat "$__object/explorer/installdir" )"
+updatedir="$( dirname "$installdir" )"
+tarballdir="$updatedir/.$__object_id"
+
+# get used user and group
+user="$( cat "$__object/parameter/user" )"
+group="$( cat "$__object/parameter/group" )"
+
+
+
+# Detect if we can install or upgrade.
+# Check if this will be a new installation.
+if [ -z "$version_is" ]; then
+    install="yes"
+
+# Check if upgrades are available. Not do this if it's not wanted by the user.
+elif ! [ -f "$__object/parameter/install-only" ]; then
+    # installation upgrade
+    if [ "$version_is" != "$version_should" ]; then
+        upgrade="yes"
+    fi
+fi
+
+
+# Check if the installation will be upgraded.
+# Remove the old folder and replace it with the new one.
+if [ "$upgrade" ]; then
+    cat << REMOTE
+cd '$updatedir'
+
+chown '$user':'$group' -R '$tarballdir'
+REMOTE
+
+    occ maintenance:mode --on
+    cat << REMOTE
+
+cp -pf '$installdir/config/config.php' '$tarballdir/config/config.php'
+mv '$installdir/data' '$tarballdir'
+
+rm -rf '$installdir'
+mv '$tarballdir' '$installdir'
+
+cd '$installdir'
+
+REMOTE
+
+    # do some maintainer stuff
+    occ upgrade
+    occ db:add-missing-columns
+    occ db:add-missing-indices
+
+    # send upgrade message
+    printf "upgraded %s to %s\n" "$version_is" "$version_should" >> "$__messages_out"
+
+# Apply some misc to the installation folder.
+elif [ "$install" ]; then
+    cat << REMOTE
+chown '$user':'$group' -R '$installdir'
+REMOTE
+fi
+
+
+# Check if the nextcloud application needs to be installed.
+# This checks the state of the configuration, not of the directory.
+if ! grep -q -F "installed = 1" "$__object/explorer/config"; then
+    # argument construction
+    occ_install_args=""
+
+    # Database
+    db_setup() {
+        if ! [ -f "$__object/parameter/db-host" ]; then
+            echo "no hostname given! can't proceed." >&2
+            exit 3
+        fi
+        occ_install_args="$occ_install_args --database '$1'"
+        occ_install_args="$occ_install_args --database-host '$(cat "$__object/parameter/db-host")'"
+
+        db_name="$__object/parameter/database-name"
+        if [ -f "$db_name" ]; then
+            occ_install_args="$occ_install_args --database-name '$(cat "$db_name")'"
+        fi
+        db_user="$__object/parameter/database-user"
+        if [ -f "$db_user" ]; then
+            occ_install_args="$occ_install_args --database-user '$(cat "$db_user")'"
+        fi
+        db_pass="$__object/parameter/database-password"
+        if [ -f "$db_pass" ]; then
+            occ_install_args="$occ_install_args --database-pass '$(cat "$db_pass")'"
+        fi
+        db_prefix="$__object/parameter/database-prefix"
+        if [ -f "$db_prefix" ]; then
+            occ_install_args="$occ_install_args --database-table-prefix '$(cat "$db_prefix")'"
+        fi
+    }
+
+    database_type="$(cat "$__object/parameter/database-type")"
+    case "$database_type" in
+        sqlite|sqlite3)
+            occ_install_args="$occ_install_args --database sqlite"
+            ;;
+        mysql|mariadb)
+            db_setup mysql
+            ;;
+        pgsql|postgres|postgresql)
+            db_setup pgsql
+            ;;
+
+        *)
+            printf "Database type '%s' is unkown!\n" "" >&2
+            exit 3
+            ;;
+    esac
+
+    # Admin stuff
+    occ_install_args="$occ_install_args --admin-pass '$(cat "$__object/parameter/admin-password")'"
+
+    admin_user="$__object/parameter/admin-user"
+    if [ -f "$admin_user" ]; then
+        occ_install_args="$occ_install_args --admin-user '$(cat "$admin_user")'"
+    fi
+    admin_email="$__object/parameter/admin-email"
+    if [ -f "$admin_email" ]; then
+        occ_install_args="$occ_install_args --admin-email '$(cat "$admin_email")'"
+    fi
+
+    # Data directory
+    datadir="$__object/parameter/datadir"
+    if [ -f "$datadir" ]; then
+        occ_install_args="$occ_install_args --data-dir '$(cat "$datadir")'"
+    fi
+
+
+    # Execute the install command
+    occ maintenance:install $occ_install_args
+
+    # send install message
+    echo installed >> "$__messages_out"
+fi
+
+
+# Handle the config
+mkdir "$__object/files"
+"$__type/map-conf-changes.sh" > "$__object/files/conf-cmds"
+
+# only print if there are changes listed
+if [ -s "$__object/files/conf-cmds" ]; then
+    # save that we did changes
+    changes="yes"
+
+    # print change commands incl. the switch of user context
+    #  using -e to abort if the commands failed
+    printf "su -s /bin/sh -l '%s' -- -e << 'SU'\n" "$user"
+    printf "cd '%s'\n" "$installdir"
+    cat "$__object/files/conf-cmds"
+    printf "SU\n"
+
+    # print a message
+    echo config >> "$__messages_out"
+fi
+
+
+# Check if this is the fist install
+if [ "$install" ]; then
+    # do some convert stuff etc.
+
+    # variable accessible from the last $install if-clause
+    case "$database_type" in
+        mysql|mariadb)
+            # only available for mysql
+            occ db:convert-mysql-charset
+            ;;
+    esac
+
+    occ db:convert-filecache-bigint
+fi
+
+# Disable maintainer mode
+if [ "$install" ] || [ "$upgrade" ] || [ "$changes" ]; then
+    occ maintenance:mode --off
+fi
diff --git a/type/__nextcloud/manifest b/type/__nextcloud/manifest
new file mode 100755
index 0000000..f6b8865
--- /dev/null
+++ b/type/__nextcloud/manifest
@@ -0,0 +1,132 @@
+#!/bin/sh -e
+# __nextcloud/manifest
+
+
+# Version compare function original from __sensible_editor
+#
+# Arguments:
+#  1: version of which $2 should be checked against
+#  2: version which should be bigger than or equal with $1
+#
+# Return code:
+#  0: $1 is bigger than $2
+#  1-n: $1 is smaller than or equal $2
+version_ge() {
+    printf "%s" "$1" | awk -F '[^0-9.]' -v target="$2" '
+    function max(x, y) { return x > y ? x : y }
+    BEGIN {
+        getline
+        nx = split($1, x, ".")
+        ny = split(target, y, ".")
+        for (i = 1; i <= max(nx, ny); ++i) {
+            diff = int(x[i]) - int(y[i])
+            if (diff == 0) continue
+            exit (diff < 0)
+        }
+        exit 1
+    }'; return $?
+}
+
+
+# Check support status
+os="$(cat "$__global/explorer/os")"
+
+case "$os" in
+    debian|ubuntu)
+        # PHP main
+        __package php-cli
+        # to unpack the package
+        __package bzip2
+        # install misc packages for nextcloud
+        __package ffmpeg
+
+        # PHP modules
+        for package in php-gd php-json php-mysql php-curl php-mbstring php-intl \
+                        php-imagick php-xml php-zip php-bz2 php-bcmath php-gmp
+        do
+            require="__package/php-cli" __package $package
+        done
+
+        # check support database additions (but don't remove junk of old ones)
+        case "$(cat "$__object/parameter/database-type")" in
+            sqlite|sqlite3)
+                __package php-sqlite3
+                ;;
+            mysql|mariadb)
+                __package php-mysql
+                ;;
+            pgsql|postgres|postgresql)
+                __package php-pgsql
+                ;;
+        esac
+        ;;
+
+    # unkown distro - what to install?
+    *)
+        printf "unkown %s, don't know what to install ..\n" "$os" >&2
+        echo "checkout the __nextcloud/manifest to contribute a working package list" >&2
+        exit 1
+        ;;
+esac
+
+
+# Get the user and group
+mode="$(cat "$__object/parameter/mode")"
+user="$(cat "$__object/parameter/user")"
+group="$(cat "$__object/parameter/group")"
+
+# Get the installation directory
+webroot="$(cat "$__object/explorer/webroot")"
+installdir="$(cat "$__object/explorer/installdir")"
+
+# Set permissions after the nextcloud installation/upgrade is done
+# FIXME maybe less strict if some parameter is not given by the user?
+#       permissions also partily set via the gencode-remote
+require="__nextcloud/$__object_id" __directory "$installdir" \
+    --mode "$mode" --owner "$user" --group "$group"
+
+
+# Get version information
+version_is="$( cat "$__object/explorer/version" )"
+version_should="$( cat "$__object/parameter/version" )"
+# The version URI
+nextcloud_uri="https://download.nextcloud.com/server/releases/nextcloud-${version_should}.tar.bz2"
+nextcloud_sum="${nextcloud_uri}.sha256"
+
+
+# Only check if there is a current installation
+if [ "$version_is" ]; then
+    # Block downgrades as there are may caused from the automatic upgrader
+    # if the current version is higher than the version that should be installed
+    if version_ge "$version_is" "$version_should"; then
+        # it's an error if the current version is higher than the one that should be installed
+        printf "The current nextcloud version '%s' is higher than the version that should be installed (%s)\n" \
+           "$version_is" "$version_should" >&2
+        printf "Please bump the nextcloud version to '%s' or higher!\n" "$version_is" >&2
+        exit 2
+    fi
+
+    # Set destination to a temporary directory
+    destination="$webroot/.$__object_id"
+else
+    # Set destination to the real destination
+    destination="$webroot/$__object_id"
+fi
+
+# Upgrade the nextcloud version
+if [ "$version_is" != "$version_should" ]; then
+    updatedir="$( dirname "$installdir" )"
+
+    # Be sure the parent directory exists for installation
+    __directory "$updatedir" --parents
+
+    require="__directory$updatedir" \
+        __download "$updatedir/nextcloud.tar.bz2" \
+           --url "$nextcloud_uri" \
+           --sum "sha256:$(curl -sS -L "$nextcloud_sum" | awk '{print $1}')"  # must be a required parameter??
+
+    require="__download$updatedir/nextcloud.tar.bz2" \
+        __unpack "$updatedir/nextcloud.tar.bz2" \
+            --tar-strip 1 \
+            --destination "$destination"
+fi
diff --git a/type/__nextcloud/map-conf-changes.sh b/type/__nextcloud/map-conf-changes.sh
new file mode 100755
index 0000000..8a00ac6
--- /dev/null
+++ b/type/__nextcloud/map-conf-changes.sh
@@ -0,0 +1,196 @@
+#!/bin/sh -e
+# __nextcloud/map-conf-changes.sh
+
+
+# The environment variable "$install" should be set if nextcloud was installed
+# now. This changes the behaviour to not trust gathered values from the
+# explorer.
+
+
+# Test if the value exists as given.
+#
+# Arguments:
+#  1: The nextcloud config name
+#  2: The value that should be set
+#
+# Return code:
+#  0: value exactly matched
+#  1: value not matched or do not exist
+testparam() {
+    # short-circuit after installation; the explorer may not be valid
+    if [ "$install" ]; then return 1; fi
+
+    if grep -q -F "$1 = $2" "$__object/explorer/config"; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# Test if the parameter is somehow set.
+#
+# Arguments:
+#  1: The nextcloud config name
+#
+# Return code:
+#  0: param exists
+#  1: param not found
+paramexist() {
+    # short-circuit after installation; the explorer may not be valid
+    if [ "$install" ]; then return 0; fi
+
+    if grep -q "^$1 = " "$__object/explorer/config"; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+# Base for the basic function types.
+#
+# Arguments:
+#  1: cdist type parameter name
+#  2: nextcloud config name
+#  3: occ printf pattern to set the value
+conf_base() {
+    if [ -f "$__object/parameter/$1" ]; then
+        value="$(cat "$__object/parameter/$1")"
+        if ! testparam "$2" "$value"; then
+            # set it because it does not exist
+            printf "php occ config:system:$3\n" "$2" "$value"
+        fi
+    else
+        if paramexist "$2"; then
+            # remove it because it exists
+            printf "php occ config:system:delete '%s'\n" "$2"
+        fi
+    fi
+}
+
+# Set's the cdist parameter value to nextcloud as specific value.
+#
+# Arguments:
+#  1: cdist type parameter name
+#  2: nextcloud config name
+conf_string() {
+    conf_base "$1" "$2" "set '%s' --type=string --value='%s'"
+}
+conf_number() {
+    conf_base "$1" "$2" "set '%s' --type=integer --value='%s'"
+}
+conf_decimal() {
+    conf_base "$1" "$2" "set '%s' --type=double --value='%s'"
+}
+
+# Sets the nextcloud configuration option after a boolean cdist parameter.
+#
+# Arguments:
+#  1: cdist type parameter name
+#  2: nextcloud config name
+conf_boolean() {
+    # map parameter to a php boolean (are outputted as 0 or 1)
+    if [ -f "$__object/parameter/$1" ]; then
+        testval="1"
+        value="true"
+    else
+        testval="0"
+        value="false"
+    fi
+
+    if ! testparam "$2" "$testval"; then
+        # set it if does not already exist
+        printf "php occ config:system:set '%s' --type=boolean --value=%s\n" "$2" "$value"
+    fi
+}
+
+# Corrects the array after all values given by the parameter. Values not given
+# to this type will be removed.
+#
+# Arguments:
+#  1: cdist type parameter name
+#  2: nextcloud config name
+conf_array() {
+    if [ -f "$__object/parameter/$1" ]; then
+        # reset array if installation is fresh
+        if [ "$install" ]; then
+            # just remove everything, because we don't know it
+            printf "php occ config:system:delete '%s' || true\n" "$2"
+
+            # counter is zero for sure
+            counter=0
+
+        # else, default behaviour of the array
+        else
+            # save counter of the next free index
+            counter=$( awk -v FS=" = " -v name="$2" '
+                        BEGIN { counter = 0 }
+                        split($1, header, "|") == 2 && header[1] ~ /^[[:digit:]]+$/ && header[2] == name \
+                            { if(counter < header[1]) counter = header[1] }
+                        END { print counter + 1 }
+                        ' "$__object/explorer/config"
+            )
+
+            # create a file which contains all lines not already resolved by this function
+            _dir="$__object/files/conf-arrays"
+            mkdir -p "$_dir"
+            grep "^[[:digit:]]*|$2 = " "$__object/explorer/config" > "$_dir/$2" || true  # ignore not found
+        fi
+
+        # iterate through every value
+        while read -r value; do
+            # check every value if he exists
+            if ! grep -q "^[[:digit:]]*|$2 = $value$" "$__object/explorer/config"; then
+                # add this value
+                printf "php occ config:system:set '%s' '%s' --type=string --value='%s'\n" \
+                    "$2" "$(( counter ))" "$value"
+                counter=$(( counter + 1 ))
+            fi
+
+            if [ -z "$install" ]; then
+                # removes it from the list of unhandled values
+                grep -v "^[[:digit:]]*|$2 = $value$" "$_dir/$2" > "$_dir/$2_tmp" || true  # ignore not found
+                mv "$_dir/$2_tmp" "$_dir/$2"  # because we can't do `cat foo > foo`
+            fi
+        done < "$__object/parameter/$1"
+
+        if [ -z "$install" ]; then
+            # interate through the leftover values
+            # remove them, as they should not exist (at least can be)
+            while read -r start equal value; do
+                # remove those specific elements from the array
+                printf "php occ config:system:delete '%s' '%s' --error-if-not-exists\n" \
+                    "$2" "$( printf "%s" "$start" | awk -F'|' '{print $1}' )"
+            done < "$_dir/$2"
+        fi
+    else
+        # remove everything because we don't know which was set by the user
+        if paramexist "$2"; then
+            # remove the whole array
+            printf "php occ config:system:delete '%s'\n" "$2"
+        fi
+    fi
+}
+
+# Set the install variable if nextcloud was not installed before this type.
+if ! testparam installed 1; then
+    install="yes"
+fi
+
+
+# Map all parameters
+
+# Generate the config changes
+
+# misc
+conf_array host trusted_domains
+
+# Already set via the installer
+if [ -z "$install" ]; then
+    # db
+    conf_string database-type dbtype
+    conf_string database-host dbhost  # FIXME host included here (takes port also)
+    conf_string database-name dbname
+    conf_string database-user dbuser
+    conf_string database-password dbpassword
+    conf_string database-prefix dbtableprefix
+fi
diff --git a/type/__nextcloud/parameter/boolean b/type/__nextcloud/parameter/boolean
new file mode 100644
index 0000000..0853f49
--- /dev/null
+++ b/type/__nextcloud/parameter/boolean
@@ -0,0 +1 @@
+install-only
diff --git a/type/__nextcloud/parameter/default/database-type b/type/__nextcloud/parameter/default/database-type
new file mode 100644
index 0000000..8b2f60c
--- /dev/null
+++ b/type/__nextcloud/parameter/default/database-type
@@ -0,0 +1 @@
+sqlite3
diff --git a/type/__nextcloud/parameter/default/group b/type/__nextcloud/parameter/default/group
new file mode 100644
index 0000000..5bbad18
--- /dev/null
+++ b/type/__nextcloud/parameter/default/group
@@ -0,0 +1 @@
+www-data
diff --git a/type/__nextcloud/parameter/default/mode b/type/__nextcloud/parameter/default/mode
new file mode 100644
index 0000000..20610ea
--- /dev/null
+++ b/type/__nextcloud/parameter/default/mode
@@ -0,0 +1 @@
+755
diff --git a/type/__nextcloud/parameter/default/user b/type/__nextcloud/parameter/default/user
new file mode 100644
index 0000000..5bbad18
--- /dev/null
+++ b/type/__nextcloud/parameter/default/user
@@ -0,0 +1 @@
+www-data
diff --git a/type/__nextcloud/parameter/optional b/type/__nextcloud/parameter/optional
new file mode 100644
index 0000000..cd09af4
--- /dev/null
+++ b/type/__nextcloud/parameter/optional
@@ -0,0 +1,13 @@
+mode
+user
+group
+webroot
+database-type
+database-host
+database-name
+database-user
+database-password
+database-prefix
+admin-user
+admin-email
+data-directory
diff --git a/type/__nextcloud/parameter/optional_multiple b/type/__nextcloud/parameter/optional_multiple
new file mode 100644
index 0000000..c70dc2d
--- /dev/null
+++ b/type/__nextcloud/parameter/optional_multiple
@@ -0,0 +1 @@
+host
diff --git a/type/__nextcloud/parameter/required b/type/__nextcloud/parameter/required
new file mode 100644
index 0000000..3e83467
--- /dev/null
+++ b/type/__nextcloud/parameter/required
@@ -0,0 +1,2 @@
+version
+admin-password