Add message when the system needs update

.gitignore

@@ -1 +1,3 @@
 zsh/extraconfig.zsh
+
+.data

zsh/update.zsh

@@ -1,3 +1,49 @@
+_check_date_file() {
+    mkdir -p ~/.config/dotfiles/.data
+    touch ~/.config/dotfiles/.data/update_date
+}
+
+_sentence() {
+    subject0=("Your" "The" "This")
+    subject1=("system" "machine" "pc" "computer")
+    adjective=("awesome" "incredible" "amazing" "brave" "hard working" "loyal" "nice" "polite" "powerful" "pro-active" "reliable" "fabulous" "fantastic" "incredible" "outstanding" "remarkable" "spectacular" "splendid" "super" "happy" "cheerful")
+    verb=("is" "seems" "looks" "appears to be")
+    no_verb=("is not" "doesn't seem" "doesn't look" "appears not to be")
+    adverb=("up-to-date" "ready" "updated")
+    dot=("." "!" "...")
+
+    n_subject0=`shuf -i1-"${#subject0[@]}" -n1`
+    n_subject1=`shuf -i1-"${#subject1[@]}" -n1`
+    n_adjective=`shuf -i1-"${#adjective[@]}" -n1`
+    n_adverb=`shuf -i1-"${#adverb[@]}" -n1`
+    n_dot=`shuf -i1-"${#dot[@]}" -n1`
+
+    if [ $1 = "updated" ];  then
+        color="32"
+        n_verb=`shuf -i1-"${#verb[@]}" -n1`
+        s_verb=$verb[$n_verb]
+    elif [ $1 = "not_updated" ]; then
+        color="31"
+        n_verb=`shuf -i1-"${#no_verb[@]}" -n1`
+        s_verb=$no_verb[$n_verb]
+    fi
+
+    echo "\033[$color;1m$subject0[$n_subject0] $adjective[$n_adjective] $subject1[$n_subject1] $s_verb $adverb[$n_adverb]$dot[$n_dot]\033[0m"
+}
+
+_check_date() {
+    _check_date_file
+
+    old_date=`cat ~/.config/dotfiles/.data/update_date`
+    new_date=`date +%d/%m/%y`
+
+    if [ "$new_date" != "$old_date" ]; then
+        _sentence not_updated
+    else
+        _sentence updated
+    fi
+}
+
 update-system() {
 
     # Ask for sudo right now
@@ -161,4 +207,6 @@ update() {
     formatted=`date -ud "@$seconds" +'%H hours %M minutes %S seconds'`
     echo "\033[32;1m=== Update finished in $formatted ===\033[0m"
 
+    _check_date_file
+    date +%d/%m/%y > ~/.config/dotfiles/.data/update_date
 }