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#!/bin/bash
if [ -z "$1" ]; then
echo "Markov chain generator."
echo "Usage: $0 filename.txt"
exit 1
fi
line_count=$(wc -l "$1")
line_count="${line_count%% *}"
declare -A counts
declare -A totals
current_line=0
prev_word=""
while read -r line; do
current_line=$(($current_line + 1))
for word in $line; do
if [[ -z "$word" ]]; then
continue
fi
if [ -n "$prev_word" ]; then
counts["$prev_word,$word"]=$((counts["$prev_word,$word"] + 1))
totals["$prev_word"]=$((totals["$prev_word"] + 1))
fi
prev_word="$word"
done
echo "Parsing... ($current_line/$line_count)"
done < "$1"
output_file="output.sql"
origin_name="$1"
> "$output_file"
echo "Packing up..."
escape_sql() {
local s="$1"
s="${s//\'/\'\'}"
s="${s//\\/\\\\}"
echo "$s"
}
current_line=0
line_count=${#counts[@]}
for key in "${!counts[@]}"; do
current_line=$((current_line + 1))
IFS=',' read -r from to <<< "$key"
efrom=$(escape_sql "$from")
eto=$(escape_sql "$to")
ename=$(escape_sql "$origin_name")
weight=${counts["$key"]}
echo "INSERT INTO chains(origin_name, from_word, to_word, weight) VALUES ('$ename', '$efrom', '$eto', $weight);" >> "$output_file"
echo "Packing up... ($current_line/$line_count)"
done
echo "Done! Markov chain output saved to '$output_file'! Feed your database with it."
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