101 lines
3 KiB
D
101 lines
3 KiB
D
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module fahrplanparser;
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import std.algorithm : filter, map, startsWith;
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import std.array : array, empty, front, replace;
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import std.conv : to;
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import std.datetime : dur, TimeOfDay, Clock;
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import std.format : format;
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import std.json : JSONValue;
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import std.regex : ctRegex, matchAll;
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import std.string : strip;
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import std.typecons : tuple;
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import kxml.xml : readDocument, XmlNode;
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import substitution;
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public:
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auto parseFahrplan(in string data)
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{
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auto currentTime = Clock.currTime;
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JSONValue j = ["time" : "%02s:%02s".format(currentTime.hour, currentTime.minute)];
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j.object["departures"] = data.readDocument
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.parseXPath(`//table[@id="departureMonitor"]/tbody/tr`)[1 .. $]
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.getRowContents
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.filter!(row => !row.empty)
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.map!(a => ["departure" : a[0].parseTime[0].to!string[0 .. $ - 3],
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"delay" : a[0].parseTime[1].total!"minutes".to!string,
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"line" : a[1],
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"direction" : a[2].substitute])
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.array.JSONValue;
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return j.toPrettyString.replace("\\/", "/");
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}
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private:
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class BadTimeInputException : Exception
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{
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this(string msg) @safe pure nothrow @nogc
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{
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super(msg);
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}
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this() @safe pure nothrow @nogc
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{
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this("");
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}
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}
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auto parseTime(in string input) @safe
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{
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auto matches = matchAll(input, ctRegex!(`(?P<hours>\d{1,2}):(?P<minutes>\d{2})`));
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if (matches.empty)
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throw new BadTimeInputException();
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auto actualTime = TimeOfDay(matches.front["hours"].to!int, matches.front["minutes"].to!int);
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matches.popFront;
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if (!matches.empty)
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{
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auto expectedTime = TimeOfDay(matches.front["hours"].to!int,
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matches.front["minutes"].to!int);
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auto timeDiff = actualTime - expectedTime;
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if(timeDiff < dur!"minutes"(0))
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timeDiff = dur!"hours"(24) + timeDiff;
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return tuple(expectedTime, timeDiff);
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}
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return tuple(actualTime, dur!"minutes"(0));
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}
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@safe unittest
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{
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import std.exception : assertThrown;
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assertThrown(parseTime(""));
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assertThrown(parseTime("lkeqf"));
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assertThrown(parseTime(":"));
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assertThrown(parseTime("00:0"));
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assert("00:00".parseTime == tuple(TimeOfDay(0, 0), dur!"minutes"(0)));
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assert("0:00".parseTime == tuple(TimeOfDay(0, 0), dur!"minutes"(0)));
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assert("00:00 00:00".parseTime == tuple(TimeOfDay(0, 0), dur!"minutes"(0)));
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assert("12:3412:34".parseTime == tuple(TimeOfDay(12, 34), dur!"minutes"(0)));
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assert("ölqjfo12:34oieqf12:31ölqjf".parseTime == tuple(TimeOfDay(12, 31), dur!"minutes"(3)));
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assert("17:53 (planmäßig 17:51 Uhr)".parseTime == tuple(TimeOfDay(17, 51), dur!"minutes"(2)));
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assert("00:00 23:59".parseTime == tuple(TimeOfDay(23,59), dur!"minutes"(1)));
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}
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auto getRowContents(XmlNode[] rows)
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{
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return rows.map!(row => row.parseXPath("//td")[1 .. $ - 1].map!((column) {
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auto link = column.parseXPath("//a");
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if (!link.empty)
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return link.front.getCData.replace("...", "");
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return column.getCData;}));
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}
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