diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fc21c62
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+data/*
+.vscode/*
\ No newline at end of file
diff --git a/README.md b/README.md
index 475dbe7..86a312a 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,10 @@
-# pb-rozklad
\ No newline at end of file
+# pb-rozklad
+
+## Wymagane:
+Shell: curl, diff, imagemagick (convert, compare), ghostscript
+
+Python3: virtualenv, fbchat, pyotp
+
+## Konfiguracja:
+- Odblokowanie konwersji PDF w ImageMagick: https://stackoverflow.com/a/59193253
+- Problemy z HTTPS na PB: https://imlc.me/dh-key-too-small
\ No newline at end of file
diff --git a/config-sample.txt b/config-sample.txt
new file mode 100644
index 0000000..2814ef2
--- /dev/null
+++ b/config-sample.txt
@@ -0,0 +1,17 @@
+PDF_URL="https://degra.wi.pb.edu.pl/rozklady/doc/isi2.pdf"
+PDF_DATE_FORMAT="+isi2_%F_%T.pdf"
+ARCHIVE_WAYBACK=true
+ARCHIVE_LOCAL=true
+
+
+DC_ENABLED=true
+DC_WEBHOOK="https://discordapp.com/api/webhooks/123456789012345678/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+DC_MESSAGE="nowy rozkład:"
+
+
+FB_ENABLED=true
+FB_EMAIL="mail@mail.com"
+FB_PASS="hunter2"
+FB_TOTP="xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+FB_GROUP_ID="1234567890123456"
+FB_MESSAGE="nowy rozkład:"
\ No newline at end of file
diff --git a/main.sh b/main.sh
new file mode 100755
index 0000000..85c24a3
--- /dev/null
+++ b/main.sh
@@ -0,0 +1,70 @@
+#!/bin/bash
+if (( $# != 1 )); then
+    echo "Usage:"
+    echo $0 "config-file"
+    exit 1
+fi
+source $1
+
+script_path=$(dirname $(realpath $0))
+cd $script_path
+mkdir -p "data/workdir" 
+if [ $ARCHIVE_LOCAL = true ]; then mkdir -p "data/archive"; fi
+cd "data/workdir"
+
+
+http_status=$(curl -o /dev/null -LIsw "%{http_code}" $PDF_URL)
+if [ $http_status -ne 200 ]; then
+    echo "Error: server returned status code" $http_status
+    exit 1
+fi
+curl -o "current.pdf" $PDF_URL -s
+
+if [ -r "previous.pdf" ]; then
+    diff "previous.pdf" "current.pdf"
+    diff_exitcode=$?
+    if [ $diff_exitcode -eq 0 ]; then
+        rm "current.pdf"
+        exit 0
+    elif [ $diff_exitcode -ne 1 ]; then
+        echo "Diff exited with code" $diff_exitcode
+        exit 1
+    fi
+else
+    diff_exitcode=-1
+fi
+
+convert -flatten -density 400 "current.pdf" "current.png"
+if [ $diff_exitcode -eq 1 ]; then
+	convert -flatten -density 400 "previous.pdf" "previous.png"
+	compare "current.png" "previous.png" "comparison.png"
+fi
+
+# nicer name for Discord upload and local archive
+pdf_nice="$(date $PDF_DATE_FORMAT)"
+ln -s "current.pdf" $pdf_nice
+
+if [ $DC_ENABLED = true ]; then
+    export DC_WEBHOOK DC_MESSAGE pdf_nice diff_exitcode
+    bash $script_path"/msg_discord.sh"
+fi
+if [ $FB_ENABLED = true ]; then
+    export FB_ENABLED FB_EMAIL FB_PASS FB_TOTP FB_GROUP_ID FB_MESSAGE diff_exitcode
+    source $script_path"/venv/bin/activate"
+    python3 $script_path"/msg_facebook.py"
+fi
+
+if [ $ARCHIVE_WAYBACK = true ]; then
+    curl -o /dev/null "https://web.archive.org/save/$ROZKLAD_URL" -w %{url_effective} -Ls
+fi
+if [ $ARCHIVE_LOCAL = true ]; then
+    cp $pdf_nice $script_path"/data/archive/"
+fi
+
+# cleanup
+rm "current.png"
+if [ $diff_exitcode -eq 1 ]; then
+    rm "previous.png" "comparison.png"
+fi
+rm $pdf_nice
+mv "current.pdf" "previous.pdf"
\ No newline at end of file
diff --git a/msg_discord.sh b/msg_discord.sh
new file mode 100755
index 0000000..f177617
--- /dev/null
+++ b/msg_discord.sh
@@ -0,0 +1,11 @@
+#!/bin/bash
+genpostdata () {
+    cat << EOF
+{"content": "$DC_MESSAGE"}
+EOF
+}
+
+curl -o /dev/null -H "Content-Type: application/json" -d "$(genpostdata)" $DC_WEBHOOK -s
+curl -o /dev/null -F "data=@current.png" $DC_WEBHOOK -s
+if [ $diff_exitcode -eq 1 ]; then curl -o /dev/null -F "data=@comparison.png" $DC_WEBHOOK -s; fi
+curl -o /dev/null -F "data=@"$pdf_nice $DC_WEBHOOK -s
\ No newline at end of file
diff --git a/msg_facebook.py b/msg_facebook.py
new file mode 100755
index 0000000..ac48e10
--- /dev/null
+++ b/msg_facebook.py
@@ -0,0 +1,14 @@
+import os
+import fbchat
+import pyotp
+
+totp = pyotp.TOTP(os.environ["FB_TOTP"])
+class CustomClient(fbchat.Client):
+    def on2FACode(self):
+        return totp.now()
+client = CustomClient(os.environ["FB_EMAIL"], os.environ["FB_PASS"])
+
+client.send(fbchat.Message(text=os.environ["FB_MESSAGE"]), thread_id=os.environ["FB_GROUP_ID"], thread_type=fbchat.ThreadType.GROUP)
+client.sendLocalFiles("current.png", thread_id=os.environ["FB_GROUP_ID"], thread_type=fbchat.ThreadType.GROUP)
+if os.environ["diff_exitcode"] == "1":
+    client.sendLocalFiles("comparison.png", thread_id=os.environ["FB_GROUP_ID"], thread_type=fbchat.ThreadType.GROUP)
\ No newline at end of file