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node_modules/sqlite3/lib/sqlite3.js

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+const path = require('path');
+const sqlite3 = require('./sqlite3-binding.js');
+const EventEmitter = require('events').EventEmitter;
+module.exports = exports = sqlite3;
+
+function normalizeMethod (fn) {
+    return function (sql) {
+        let errBack;
+        const args = Array.prototype.slice.call(arguments, 1);
+
+        if (typeof args[args.length - 1] === 'function') {
+            const callback = args[args.length - 1];
+            errBack = function(err) {
+                if (err) {
+                    callback(err);
+                }
+            };
+        }
+        const statement = new Statement(this, sql, errBack);
+        return fn.call(this, statement, args);
+    };
+}
+
+function inherits(target, source) {
+    for (const k in source.prototype)
+        target.prototype[k] = source.prototype[k];
+}
+
+sqlite3.cached = {
+    Database: function(file, a, b) {
+        if (file === '' || file === ':memory:') {
+            // Don't cache special databases.
+            return new Database(file, a, b);
+        }
+
+        let db;
+        file = path.resolve(file);
+
+        if (!sqlite3.cached.objects[file]) {
+            db = sqlite3.cached.objects[file] = new Database(file, a, b);
+        }
+        else {
+            // Make sure the callback is called.
+            db = sqlite3.cached.objects[file];
+            const callback = (typeof a === 'number') ? b : a;
+            if (typeof callback === 'function') {
+                function cb() { callback.call(db, null); }
+                if (db.open) process.nextTick(cb);
+                else db.once('open', cb);
+            }
+        }
+
+        return db;
+    },
+    objects: {}
+};
+
+
+const Database = sqlite3.Database;
+const Statement = sqlite3.Statement;
+const Backup = sqlite3.Backup;
+
+inherits(Database, EventEmitter);
+inherits(Statement, EventEmitter);
+inherits(Backup, EventEmitter);
+
+// Database#prepare(sql, [bind1, bind2, ...], [callback])
+Database.prototype.prepare = normalizeMethod(function(statement, params) {
+    return params.length
+        ? statement.bind.apply(statement, params)
+        : statement;
+});
+
+// Database#run(sql, [bind1, bind2, ...], [callback])
+Database.prototype.run = normalizeMethod(function(statement, params) {
+    statement.run.apply(statement, params).finalize();
+    return this;
+});
+
+// Database#get(sql, [bind1, bind2, ...], [callback])
+Database.prototype.get = normalizeMethod(function(statement, params) {
+    statement.get.apply(statement, params).finalize();
+    return this;
+});
+
+// Database#all(sql, [bind1, bind2, ...], [callback])
+Database.prototype.all = normalizeMethod(function(statement, params) {
+    statement.all.apply(statement, params).finalize();
+    return this;
+});
+
+// Database#each(sql, [bind1, bind2, ...], [callback], [complete])
+Database.prototype.each = normalizeMethod(function(statement, params) {
+    statement.each.apply(statement, params).finalize();
+    return this;
+});
+
+Database.prototype.map = normalizeMethod(function(statement, params) {
+    statement.map.apply(statement, params).finalize();
+    return this;
+});
+
+// Database#backup(filename, [callback])
+// Database#backup(filename, destName, sourceName, filenameIsDest, [callback])
+Database.prototype.backup = function() {
+    let backup;
+    if (arguments.length <= 2) {
+        // By default, we write the main database out to the main database of the named file.
+        // This is the most likely use of the backup api.
+        backup = new Backup(this, arguments[0], 'main', 'main', true, arguments[1]);
+    } else {
+        // Otherwise, give the user full control over the sqlite3_backup_init arguments.
+        backup = new Backup(this, arguments[0], arguments[1], arguments[2], arguments[3], arguments[4]);
+    }
+    // Per the sqlite docs, exclude the following errors as non-fatal by default.
+    backup.retryErrors = [sqlite3.BUSY, sqlite3.LOCKED];
+    return backup;
+};
+
+Statement.prototype.map = function() {
+    const params = Array.prototype.slice.call(arguments);
+    const callback = params.pop();
+    params.push(function(err, rows) {
+        if (err) return callback(err);
+        const result = {};
+        if (rows.length) {
+            const keys = Object.keys(rows[0]);
+            const key = keys[0];
+            if (keys.length > 2) {
+                // Value is an object
+                for (let i = 0; i < rows.length; i++) {
+                    result[rows[i][key]] = rows[i];
+                }
+            } else {
+                const value = keys[1];
+                // Value is a plain value
+                for (let i = 0; i < rows.length; i++) {
+                    result[rows[i][key]] = rows[i][value];
+                }
+            }
+        }
+        callback(err, result);
+    });
+    return this.all.apply(this, params);
+};
+
+let isVerbose = false;
+
+const supportedEvents = [ 'trace', 'profile', 'change' ];
+
+Database.prototype.addListener = Database.prototype.on = function(type) {
+    const val = EventEmitter.prototype.addListener.apply(this, arguments);
+    if (supportedEvents.indexOf(type) >= 0) {
+        this.configure(type, true);
+    }
+    return val;
+};
+
+Database.prototype.removeListener = function(type) {
+    const val = EventEmitter.prototype.removeListener.apply(this, arguments);
+    if (supportedEvents.indexOf(type) >= 0 && !this._events[type]) {
+        this.configure(type, false);
+    }
+    return val;
+};
+
+Database.prototype.removeAllListeners = function(type) {
+    const val = EventEmitter.prototype.removeAllListeners.apply(this, arguments);
+    if (supportedEvents.indexOf(type) >= 0) {
+        this.configure(type, false);
+    }
+    return val;
+};
+
+// Save the stack trace over EIO callbacks.
+sqlite3.verbose = function() {
+    if (!isVerbose) {
+        const trace = require('./trace');
+        [
+            'prepare',
+            'get',
+            'run',
+            'all',
+            'each',
+            'map',
+            'close',
+            'exec'
+        ].forEach(function (name) {
+            trace.extendTrace(Database.prototype, name);
+        });
+        [
+            'bind',
+            'get',
+            'run',
+            'all',
+            'each',
+            'map',
+            'reset',
+            'finalize',
+        ].forEach(function (name) {
+            trace.extendTrace(Statement.prototype, name);
+        });
+        isVerbose = true;
+    }
+
+    return sqlite3;
+};