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Add mbcheck.

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Young Hahn
2011-05-19 14:42:17 -04:00
parent c31d820313
commit 528fdf2625
5 changed files with 197 additions and 0 deletions
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162
bin/mbcheck Executable file
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@@ -0,0 +1,162 @@
#!/usr/bin/env node
var options = argv = require('optimist').argv,
_ = require('underscore'),
Step = require('step'),
utils = require('..').utils,
MBTiles = require('..').MBTiles,
mbtiles,
tables = [],
zooms = [],
tiles = [];
// Show help.
if (argv.help || argv._.length === 0) {
console.warn('Usage: mbcheck [OPTIONS] [FILE]');
utils.table([
['--help', 'Show help.']
]);
process.exit();
}
// Wishlist:
// ---------
// - check that tiles exist for specified bounds
Step(
function() { mbtiles = new MBTiles(argv._[0], this); },
function() { mbtiles.integrity(this); },
function(err) {
if (err) throw err;
mbtiles.exists('tiles', function(err, exists) {
if (!exists) throw new Error('`tiles` table does not exist.');
this();
}.bind(this));
},
function(err) {
if (err) throw err;
mbtiles.exists('metadata', function(err, exists) {
if (!exists) throw new Error('`metadata` table does not exist.');
this();
}.bind(this));
},
function(err) {
if (err) throw err;
mbtiles.metadata('name', this.parallel());
mbtiles.metadata('type', this.parallel());
mbtiles.metadata('desciption', this.parallel());
mbtiles.metadata('version', this.parallel());
mbtiles.metadata('format', this.parallel());
mbtiles.metadata('bounds', this.parallel());
},
function(err, name, type, description, version, format, bounds) {
console.warn('');
console.warn(' Metadata');
utils.table([
['name', name],
['type', type],
['description', description],
['vesion', version],
['format', format],
['bounds', bounds]
]);
this();
},
function(err) {
if (err) throw err;
Step(
function() {
var group = this.group(),
query = mbtiles.db.prepare(
'SELECT zoom_level AS zoom, ' +
'COUNT(zoom_level) AS count ' +
'FROM tiles ' +
'WHERE zoom_level = ?'
);
for (var i = 0; i < 30; i++) {
query.get(i, group());
}
query.finalize();
},
function(err, rows) {
if (err) throw err;
zooms = rows;
do {
var last = zooms.pop();
if (last.count) zooms.push(last);
} while(!last.count);
do {
var first = zooms.shift();
if (first.count) zooms.unshift(first);
} while(!first.count);
this();
}.bind(this)
);
},
function(err) {
if (err) throw err;
Step(
function() {
var group = this.group(),
query = mbtiles.db.prepare(
'SELECT MAX(tile_column) AS maxx, ' +
'MIN(tile_column) AS minx, ' +
'MAX(tile_row) AS maxy, ' +
'MIN(tile_row) AS miny, ' +
'zoom_level AS zoom ' +
'FROM tiles ' +
'WHERE zoom_level = ?'
);
for (var i = 0; i < zooms.length; i++) {
query.get(zooms[i].zoom, group());
}
query.finalize();
},
function(err, rows) {
if (err) throw err;
var group = this.group(),
query = mbtiles.db.prepare(
'SELECT zoom_level AS zoom, ' +
'COUNT(zoom_level) AS count, ' +
'? AS expected ' +
'FROM tiles ' +
'WHERE zoom_level = ? AND ' +
'tile_column >= ? AND ' +
'tile_column <= ? AND ' +
'tile_row >= ? AND ' +
'tile_row <= ?'
);
for (var i = 0; i < rows.length; i++) {
var expected = (rows[i].maxx - rows[i].minx + 1) * (rows[i].maxy - rows[i].miny + 1);
query.get(
expected,
rows[i].zoom,
rows[i].minx,
rows[i].maxx,
rows[i].miny,
rows[i].maxy,
group()
);
}
query.finalize();
},
function(err, rows) {
if (err) throw err;
console.warn('');
var output = [];
output.push(['Z', 'Tiles', 'Missing']);
_(rows).each(function(row, index) {
output.push([
row.zoom,
zooms[index].count,
row.expected - row.count
]);
});
utils.table(output);
this();
}.bind(this)
);
}
);

2
index.js
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@@ -1,8 +1,10 @@
var MBTiles = require('./lib/mbtiles'),
utils = require('./lib/utils'),
Step = require('step');
module.exports = {
MBTiles: MBTiles,
utils: utils,
pool: function(datasource) {
return {
create: function(callback) {

11
lib/mbtiles.js
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@@ -34,6 +34,17 @@ MBTiles.prototype.exists = function(table, callback) {
}
};
// DB integrity check.
MBTiles.prototype.integrity = function(callback) {
this.db.get('PRAGMA quick_check(1)', function(err, row) {
if (!(row && row.integrity_check && row.integrity_check === 'ok')) {
callback(new Error('Corrupted database.'));
} else {
callback(null, true);
}
});
};
// Setup schema, indices, views for a new mbtiles database.
// Sets the synchronous flag to OFF for (much) faster inserts.
// See http://www.sqlite3.org/pragma.html#pragma_synchronous

21
lib/utils.js Normal file
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@@ -0,0 +1,21 @@
var utils = {};
utils.table = function(fields) {
if (!fields[0]) return;
var lengths = fields[0].map(function(val, i) {
return Math.max.apply(Math, fields.map(function(field) {
if (field[i] === undefined) field[i] = '';
return field[i].toString().length;
}));
});
fields.forEach(function(field) {
console.warn(
' ' + field.map(function(val, i) {
if (i >= lengths.length - 1) return val;
return val + Array(lengths[i] - val.toString().length + 1).join(' ');
}).join(' ')
);
});
};
module.exports = utils;

1
package.json
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@@ -17,6 +17,7 @@
"Young Hahn <yhahn>"
],
"dependencies": {
"optimist": "0.2.x",
"sqlite3": "2.0.x",
"step": "0.0.x",
"underscore": "1.1.x",