#!/bin/sh
if test $# -ne 2
then
	printf "Usage: %s infile outfile\n" "$0" >&2
	exit 1
fi

# Escape
sed -E 's,&,\&amp\;,g;s,<,\&lt\;,g;s,>,\&gt\;,g' "$1" |

# Remove joins/parts/quits
sed -E '/^(..:..) -!- ([^ ]+).*has joined \#[^ ]*$/d' |
sed -E '/^(..:..) -!- ([^ ]+).*has quit \[[^]]*\]$/d' |
sed -E '/^(..:..) -!- ([^ ]+).*has left \#[^ ]* \[[^]]*\]$/d' |
# Speak nick changes specially
sed -E 's,^(..:..) -!- ([^ ]+) is now known as ([^ ]+)$,<meta>\1 \2 became \3</meta>,' |
# Speak day changes specially
sed -E 's,^ --- (Day changed .*)$,<meta>\1</meta>,' |
# Remove minicat topic diffs
sed -E '/^(..:..) \&lt\;.minicat\&gt\; .?\(diff\).*/d' |
# Speak timestaps and nicks specially
sed -E 's,^(..:..) \&lt\;[+@ ]?([^& ]+)\&gt\;,<meta>\1 \2</meta>,' |
sed -E 's,^(..:..)  \* ([^ ]+),<meta>\1 action \2</meta>,' |

# Handle "<-" and "←" answers
sed -E 's,\&lt;-|←,<meta>answer</meta>,' |
# Handle someone quoting another person
sed -E 's,\&lt\;[+@ ]?([^& :]+)\&gt\;,<meta>quoting \1</meta>,g' |
sed -E 's, \* ([^ ]+),<meta>quoting action \1</meta>,g' |
# Handle Twitter URLs
sed -E 's,https?://(mobile\.|www\.)?twitter[^ )>]+,<meta> twitter URL</meta>,g' |
# Handle URLs
sed -E 's,(https?|gopher)://[^ )>]+,<meta> \1 URL</meta>,g' |
# Handle 'fancy' quotes
sed -E 's,«|“,<meta>left quote</meta>,g;s,»|”|„,<meta>right quote</meta>,g' |

# Handle some common emoticons
sed -E 's,\^_\^,happy eyes emoticon,g' |
sed -E 's,\\o\/,arms in air emoticon,g' |
sed -E 's,\bo\/,waving emoticon,g' |
sed -E 's,\\o\b,waving emoticon,g' |
sed -E 's,\:\),smiling emoticon,g' |
sed -E 's,\(\:,reversed smiling emoticon,g' |
sed -E 's,\:\(,sad emoticon,g' |
sed -E 's,\)\:,reversed sad emoticon,g' |
sed -E 's,:D\b,colon dee,g' |
sed -E 's,\bD:,dee colon,g' |
sed -E 's,:D:,colon dee colon,g' |

# Handle some special characters espeak ignores
sed -E 's,\^,caret,g' |

# Add pauses
sed -E 's,$,<break time="700">,' |

# Translate <meta></meta> to actual tags
sed -E 's,<meta>,<prosody pitch="+5st"><break>,g;s,</meta>,<break></prosody>,g' |

# Speak
espeak --stdin --stdout --punct='"' -m |

# Convert to mp3
ffmpeg -i /dev/stdin -f mp3 "$2"