shortcut negation syntax

spec/search/lexer.spec.js

@@ -64,6 +64,11 @@ describe("Lexer expression", () => {
             .toEqual(["#", "~author", ".", "title", "=", "hugh howey", "and", "note", ".", "book title", "=", "silo"]);
     });
 
+    it("negation of label and relation", () => {
+        expect(lexer(`#!capital ~!neighbor`).expressionTokens)
+            .toEqual(["#!capital", "~!neighbor"]);
+    });
+
     it("negation of sub-expression", () => {
         expect(lexer(`# not(#capital) and note.noteId != "root"`).expressionTokens)
             .toEqual(["#", "not", "(", "#capital", ")", "and", "note", ".", "noteid", "!=", "root"]);

spec/search/parser.spec.js

@@ -21,13 +21,16 @@ describe("Parser", () => {
         });
 
         expect(rootExp.constructor.name).toEqual("OrExp");
-        const [firstSub, secondSub] = rootExp.subExpressions;
+        const subs = rootExp.subExpressions;
 
-        expect(firstSub.constructor.name).toEqual("NoteCacheFulltextExp");
-        expect(firstSub.tokens).toEqual(["hello", "hi"]);
+        expect(subs[0].constructor.name).toEqual("NoteCacheFulltextExp");
+        expect(subs[0].tokens).toEqual(["hello", "hi"]);
 
-        expect(secondSub.constructor.name).toEqual("NoteContentFulltextExp");
-        expect(secondSub.tokens).toEqual(["hello", "hi"]);
+        expect(subs[1].constructor.name).toEqual("NoteContentProtectedFulltextExp");
+        expect(subs[1].tokens).toEqual(["hello", "hi"]);
+
+        expect(subs[2].constructor.name).toEqual("NoteContentUnprotectedFulltextExp");
+        expect(subs[2].tokens).toEqual(["hello", "hi"]);
     });
 
     it("simple label comparison", () => {
@@ -43,6 +46,30 @@ describe("Parser", () => {
         expect(rootExp.comparator).toBeTruthy();
     });
 
+    it("simple attribute negation", () => {
+        let rootExp = parser({
+            fulltextTokens: [],
+            expressionTokens: ["#!mylabel"],
+            parsingContext: new ParsingContext()
+        });
+
+        expect(rootExp.constructor.name).toEqual("NotExp");
+        expect(rootExp.subExpression.constructor.name).toEqual("AttributeExistsExp");
+        expect(rootExp.subExpression.attributeType).toEqual("label");
+        expect(rootExp.subExpression.attributeName).toEqual("mylabel");
+
+        rootExp = parser({
+            fulltextTokens: [],
+            expressionTokens: ["~!myrelation"],
+            parsingContext: new ParsingContext()
+        });
+
+        expect(rootExp.constructor.name).toEqual("NotExp");
+        expect(rootExp.subExpression.constructor.name).toEqual("AttributeExistsExp");
+        expect(rootExp.subExpression.attributeType).toEqual("relation");
+        expect(rootExp.subExpression.attributeName).toEqual("myrelation");
+    });
+
     it("simple label AND", () => {
         const rootExp = parser({
             fulltextTokens: [],

src/services/search/lexer.js

@@ -83,6 +83,10 @@ function lexer(str) {
 
                 continue;
             }
+            else if (['#', '~'].includes(currentWord) && chr === '!') {
+                currentWord += chr;
+                continue;
+            }
             else if (chr === ' ') {
                 finishWord();
                 continue;
@@ -93,7 +97,10 @@ function lexer(str) {
                 finishWord();
                 continue;
             }
-            else if (fulltextEnded && previousOperatorSymbol() !== isOperatorSymbol(chr)) {
+            else if (fulltextEnded
+                && !['#!', '~!'].includes(currentWord)
+                && previousOperatorSymbol() !== isOperatorSymbol(chr)) {
+
                 finishWord();
 
                 currentWord += chr;

src/services/search/parser.js

@@ -70,8 +70,8 @@ function getExpression(tokens, parsingContext, level = 0) {
             i++;
 
             return new OrExp([
-                NoteContentUnprotectedFulltextExp(operator, [tokens[i]]),
-                NoteContentProtectedFulltextExp(operator, [tokens[i]])
+                new NoteContentUnprotectedFulltextExp(operator, [tokens[i]]),
+                new NoteContentProtectedFulltextExp(operator, [tokens[i]])
             ]);
         }
 
@@ -134,6 +134,22 @@ function getExpression(tokens, parsingContext, level = 0) {
         parsingContext.addError(`Unrecognized note property "${tokens[i]}"`);
     }
 
+    function parseAttribute(name) {
+        const isLabel = name.startsWith('#');
+
+        name = name.substr(1);
+
+        const isNegated = name.startsWith('!');
+
+        if (isNegated) {
+            name = name.substr(1);
+        }
+
+        const subExp = isLabel ? parseLabel(name) : parseRelation(name);
+
+        return isNegated ? new NotExp(subExp) : subExp;
+    }
+
     function parseLabel(labelName) {
         parsingContext.highlightedTokens.push(labelName);
 
@@ -234,15 +250,8 @@ function getExpression(tokens, parsingContext, level = 0) {
         if (Array.isArray(token)) {
             expressions.push(getExpression(token, parsingContext, level++));
         }
-        else if (token.startsWith('#')) {
-            const labelName = token.substr(1);
-
-            expressions.push(parseLabel(labelName));
-        }
-        else if (token.startsWith('~')) {
-            const relationName = token.substr(1);
-
-            expressions.push(parseRelation(relationName));
+        else if (token.startsWith('#') || token.startsWith('~')) {
+            expressions.push(parseAttribute(token));
         }
         else if (['orderby', 'limit'].includes(token)) {
             if (level !== 0) {