stats

#!/usr/bin/env node

var input = '',
    stats;

var countParents = function(data) {
  var parent = data.parent,
      contact = data.contact;
  if (!stats.type) {
    stats.type = data.type;
  }
  if (!stats.name) {
    stats.name = data.name;
  }
  if (!stats.id) {
    stats.id = data._id;
  }
  if (!stats.rev) {
    stats.rev = data._rev;
  }
  if (parent) {
    stats.depth++;
    countParents(parent);
  }
  if (contact) {
    stats.depth++;
    countParents(contact);
  }
};

process.stdin.setEncoding('utf8');

process.stdin.on('readable', function() {
  var chunk = process.stdin.read();
  if (chunk !== null) {
    input += chunk;
  }
});

process.stdin.on('end', function() {
  var output = [],
      data = JSON.parse(input);
  if (data.rows) {
    data = data.rows;
  } else if (data.docs) {
    data = data.docs;
  } else if (data.constructor !== Array) {
    data = [data];
  }
  data.forEach(function(row) {
    if (!row || typeof row !== 'object') {
      return;
    }
    stats = { depth: 0 };
    stats.length = JSON.stringify(row).length;
    countParents(row.doc || row);
    output.push(stats);
  });
  if (output.length <= 1) {
    console.log(JSON.stringify(output));
  } else {
    var totals = { docs: output.length, depth: 0, length: 0 };
    output.forEach(function(stat) {
      totals.depth += stat.depth;
      totals.length += stat.length;
    });
    console.log(JSON.stringify(totals));
  }
});