!7

static L<S> sentences = toLinesFullTrim([[

  "0" is a digit.
  "1" is a digit.
  "2" is a digit.
  "3" is a digit.
  "4" is a digit.
  "5" is a digit.
  "6" is a digit.
  "7" is a digit.
  "8" is a digit.
  "9" is a digit.
  These are all the digits that exist.
  A number is a concatenation of digits.

]]);

static L<S> questions = toLinesFullTrim([[

  Is "5" a digit?
  Is "your mama" a digit?
  
]]);
  

static class Concept {
  S name;
  new L<S> stringExamples;
  new L<S> descriptions;
  boolean closed;
  
  *(S *name) {}
  *() {}
  
  void addStringExample(S s) {
    if (!stringExamples.contains(s)) // yes it's inefficient... who cares right now :))))))
      stringExamples.add(s);
  }
  
  void addDescription(S s) {
    if (!descriptions.contains(s))
      descriptions.add(s);
  }
}

static class Concepts {
  new Map<S, Concept> map;
  
  Concept get(S s) {
    Concept c = map.get(s);
    if (c == null) map.put(s, c = new Concept(s));
    return c;
  }
}

static new Concepts concepts;

p {
  for (S s : concatLists(sentences, questions)) {
    print("> " + s);
    print("< " + answer(s));
  }
  
  print("Number of concepts: " + concepts.map.size() + " (" + structure(concepts.map.keySet()) + ")");
  
  makeAndroid("Digit Understander Bot.");
}

static synchronized S answer(S s) {
  L<S> tok = javaTok(s);
  
  S[] bla = match("* is a *.", tok);
  if (bla != null && bla[0].startsWith("\"")) {
    print(bla[0] + " is a " + bla[1] + "!");
    concepts.get(bla[1]).addStringExample(unquote(bla[0]));
    return "ok";
  }
  
  bla = match("These are all the * that exist.", tok);
  if (bla != null) {
    S c = bla[0].replaceAll("s$", "");
    concepts.get(c).closed = true;
    return "ok, closed concept " + c + ".";
  }
  
  bla = match("A * is ... .", tok);
  if (bla != null) {
    S desc = joinRest(bla, 1);
    concepts.get(bla[0]).addDescription(desc);
    print(bla[0] + ": " + desc);
    return "ok";
  }
  
  // process questions on knowledge base
  
  bla = match("Is * a *?", tok);
  if (bla != null) {
    S answer = null /*"Dunno."*/;
    Concept c = concepts.get(bla[1]);
    if (bla[0].startsWith("\"") && c.closed) {
      answer = c.stringExamples.contains(unquote(bla[0])) ? "Yes." : "No.";
    }
    return answer;
  }
  
  bla = match("what is a *?", tok);
  if (bla != null) {
    S answer = null /*"Dunno."*/;
    Concept c = concepts.get(unquote(bla[0]));
    if (!c.descriptions.isEmpty())
      answer = "A " + c.name + " is " + c.descriptions.get(0) + ".";
    else if (c.closed)
      answer = "A " + c.name + " is one of " + c.stringExamples.size() + " globally defined strings.";
    return answer;
  }
    
  return null;
}

static S[] match(S pat, L<S> tok) {
  new Matches m;
  return match3(pat, join(tok), m) ? m.m : null;
}

Began life as a copy of #1001242