whatsapp to csv converter

Project/Tools/whatsapp2csv.sh

@@ -0,0 +1,85 @@
+#!/usr/bin/env bash
+
+SCRIPT=`realpath $0`
+SCRIPTPATH=`dirname $SCRIPT`
+
+# toolset:---------------------------------------------------------------------
+
+command 2> >(while read line; do echo -e "\e[01;31m$line\e[0m" >&2; done)
+
+function lineprint {
+    printf '%*s\n' "${COLUMNS:-$(tput cols)}" '' | tr ' ' =
+}
+
+function message {
+    lineprint
+    printf "$1\n"
+    lineprint
+}
+
+function error_message {
+    lineprint
+    printf "$1\n" >&2
+    lineprint
+}
+
+current_action="IDLE"
+
+function confirm_action {
+    message "successfully finished action: $current_action"
+}
+
+function set_action {
+    current_action="$1"
+    message "$1"
+}
+
+function perform {
+    "$@"
+    local status=$?
+    if [ $status -ne 0 ]
+    then
+        error_message "$current_action failed!"
+    fi
+    return $status
+}
+
+function perform_and_exit {
+    perform "$@" || exit 1
+}
+
+# -----------------------------------------------------------------------------
+# reading input
+
+INPUT=$1
+OUTPUT="$INPUT.csv"
+
+if [ $# -eq 0 ]
+then
+    error_message "Error: no input file given. Usage: $0 <Whatsapp textbackup file>"
+    exit 1
+fi
+
+set_action "processing File: ${INPUT}"
+
+if [ ! -e "$INPUT" ]
+then
+    error_message "Error: file '$INPUT' not found"
+    exit 1
+fi
+
+perform_and_exit echo -e "date\ttime\tperson\tmessage" > "$OUTPUT"
+
+# doing the following things in the pipeline below:
+#
+# 1. merging multiline messages by replacing newlines with spaces if they are not starting with a number followed by '/' (not stating with a date)
+# 2. delete all lines containing the keywords: "added, creates, end-to-end, Media ommited" (which are most probably system messages)
+# 3. replace separators of whatsapp's txt-format with '\t' as separator for csv
+# 4. delete all double-quotes. Because people are too stupid to type them in pairs and that breaks some csv-interpreters 🤦‍♂
+
+perform_and_exit sed ':a;N;/\n[0-9]\{1,\}\+\//!s/\n/ /;ta;P;D' "$INPUT" | grep -v -E 'added|created|end-to-end|Media omitted' | sed 's/, /\t/1; s/- /\t/1; s/: /\t/1;' | tr -d '"' >> "$OUTPUT"
+
+confirm_action
+
+message "Wrote output to $OUTPUT"
+