Initialize metadata on quote version change

Consequently, on quote load as well.

* src/server/quote/ProgramQuoteCleaner.js (_fixMeta): New method.
  (clean): Use it.

src/server/quote/ProgramQuoteCleaner.js

@@ -19,7 +19,9 @@
  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-var Class = require( 'easejs' ).Class;
+'use strict';
+
+const { Class }   = require( 'easejs' );
 
 
 module.exports = Class( 'ProgramQuoteCleaner',
@@ -51,10 +53,16 @@ module.exports = Class( 'ProgramQuoteCleaner',
         }
 
         // fix any problems with linked groups
-        this._fixLinkedGroups( quote, function( err )
+        this._fixLinkedGroups( quote, err =>
         {
-            // done
-            callback( err );
+            if ( err )
+            {
+                callback( err );
+                return;
+            }
+
+            this._fixMeta( quote );
+            callback( null );
         } );
     },
 
@@ -149,6 +157,34 @@ module.exports = Class( 'ProgramQuoteCleaner',
         }
 
         return len;
-    }
+    },
+
+
+    /**
+     * Initialize missing metadata
+     *
+     * This is similar to bucket initialization, except there are no leaders
+     * or default values---just empty arrays.  That may change in the future.
+     *
+     * @param {ServerSideQuote} quote quote containing metabucket
+     *
+     * @return {undefined}
+     */
+    'private _fixMeta'( quote )
+    {
+        const { fields } = this._program.meta;
+        const metabucket = quote.getMetabucket();
+        const metadata   = metabucket.getData();
+
+        Object.keys( fields ).forEach( field_name =>
+        {
+            if ( Array.isArray( metadata[ field_name ] ) )
+            {
+                return;
+            }
+
+            metabucket.setValues( { [field_name]: [] } );
+        } );
+    },
 } );
 

test/server/quote/ProgramQuoteCleanerTest.js

@@ -0,0 +1,90 @@
+/**
+ * Tests ProgramQuoteCleaner
+ *
+ *  Copyright (C) 2017 R-T Specialty, LLC.
+ *
+ *  This file is part of the Liza Data Collection Framework.
+ *
+ *  liza is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU Affero General Public License as
+ *  published by the Free Software Foundation, either version 3 of the
+ *  License, or (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU Affero General Public License
+ *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+'use strict';
+
+const { expect } = require( 'chai' );
+const Sut        = require( '../../../' ).server.quote.ProgramQuoteCleaner;
+
+
+describe( 'ProgramQuoteCleaner', () =>
+{
+    describe( "metadata cleaning", () =>
+    {
+        [
+            {
+                label:    "populates all fields when empty",
+                existing: {},
+                fields:   { foo: {}, bar: {} },
+                expected: { foo: [], bar: [] },
+            },
+            {
+                label:    "populates only missing fields when non-empty",
+                existing: { foo: [ 1 ], baz: [ 2 ] },
+                fields:   { foo: {}, bar: {} },
+                expected: { foo: [ 1 ], bar: [], baz: [ 2 ] },
+            },
+        ].forEach( ( { label, existing, fields, expected } ) =>
+            it( label, done =>
+            {
+                const quote   = createStubQuote( existing );
+                const program = createStubProgram( fields );
+
+                Sut( program ).clean( quote, err =>
+                {
+                    expect( err ).to.equal( null );
+                    expect( quote.getMetabucket().getData() )
+                        .to.deep.equal( expected );
+
+                    done();
+                } );
+            } )
+        );
+    } );
+} );
+
+
+function createStubQuote( metadata )
+{
+    return {
+        getProgramId: () => 'foo',
+        setData: () => {},
+        getMetabucket: () => ( {
+            getDataByName: name => metadata[ name ],
+            getData: () => metadata,
+            setValues: data =>
+            {
+                Object.keys( data ).forEach( field_name =>
+                    metadata[ field_name ] = data[ field_name ]
+                );
+            },
+        } ),
+    };
+}
+
+
+function createStubProgram( meta_fields )
+{
+    return {
+        getId: () => 'foo',
+        meta: { fields: meta_fields },
+    };
+}