Don't fail to parse plans without costs nor analyze

Unfortunately plans with line breaks can't be parsed anymore
See #36 and #40

Fixes #119

src/services/__tests__/08-plan-without-cost.spec.ts

@@ -14,3 +14,19 @@ Seq Scan on pg_class (actual time=0.013..0.181 rows=645 loops=1)
   });
 });
 
+
+describe('PlanService', () => {
+  test('Can parse plan without analyze nor costs', () => {
+    const planService = new PlanService();
+    const source = `
+Bitmap Heap Scan on a
+   Recheck Cond: ((id = 42) OR (id = 4711))
+   ->  BitmapOr
+         ->  Bitmap Index Scan on a_pkey
+               Index Cond: (id = 42)
+         ->  Bitmap Index Scan on a_pkey
+               Index Cond: (id = 4711)
+`;
+    const r: any = planService.fromSource(source);
+  });
+});

src/services/__tests__/1-parse-error-line-break.spec.ts

@@ -1,11 +1,24 @@
 import { PlanService } from '@/services/plan-service';
 
 describe('PlanService', () => {
-  test('Can`t parse plan with line break from text', () => {
+  test('Can`t parse plan with line break', () => {
     const planService = new PlanService();
     const planText = `
  Seq Scan on ref  (cost=0.00..14425.02 rows=1000002 width=8) (actual
 `;
     expect(() => { planService.fromText(planText); }).toThrow();
   });
+
+  test('Can`t parse plan with line break', () => {
+    const planService = new PlanService();
+    // tslint:disable:max-line-length
+    const source = `
+Nested Loop Left Join  (cost=11.95..28.52 rows=5 width=157) (actual time=0.010..0.010 rows=0 loops=1)
+  Output: rel_users_exams.user_username, rel_users_exams.exam_id, rel_users_exams.started_at, rel_users_exams.finished_at, exam_1.id, exam_1.title, ex
+here is a line break
+Planning Time: 1.110 ms
+Execution Time: 0.170 ms`;
+    expect(() => { planService.fromText(source); }).toThrow();
+  });
+
 });

src/services/__tests__/plan-service.spec.ts

@@ -229,18 +229,4 @@ Result  (cost=0.31..0.32 rows=1 width=4)
     expect(r.Plan.Plans[0]['Shared Hit Blocks']).toEqual(16230);
     expect(r.Plan.Plans[0]['Shared Read Blocks']).toEqual(67104);
   });
-
-  test('correctly parses line breaks', () => {
-    const planService = new PlanService();
-    // tslint:disable:max-line-length
-    const source = `
-Nested Loop Left Join  (cost=11.95..28.52 rows=5 width=157) (actual time=0.010..0.010 rows=0 loops=1)
-  Output: rel_users_exams.user_username, rel_users_exams.exam_id, rel_users_exams.started_at, rel_users_exams.finished_at, exam_1.id, exam_1.title, ex
-here is a line break
-Planning Time: 1.110 ms
-Execution Time: 0.170 ms`;
-    // tslint:enable:max-line-length
-    const r: any = planService.fromSource(source);
-    expect(r['Execution Time']).toEqual(0.17);
-  });
 });

src/services/plan-service.ts

@@ -285,8 +285,11 @@ export class PlanService {
       // Remove any begining "
       line = line.replace(/^\s*"/, '');
 
+
+      const emptyLineRegex = '^\s*$';
+      const headerRegex = '^\\s*(QUERY|---|#).*$';
       const prefixRegex = '^(\\s*->\\s*|\\s*)';
-      const typeRegex = '(\\S.*?)';
+      const typeRegex = '([^\\r\\n\\t\\f\\v\\:\\(]*?)';
       // tslint:disable-next-line:max-line-length
       const estimationRegex = '\\(cost=(\\d+\\.\\d+)\\.\\.(\\d+\\.\\d+)\\s+rows=(\\d+)\\s+width=(\\d+)\\)';
       const nonCapturingGroupOpen = '(?:';
@@ -297,10 +300,9 @@ export class PlanService {
       const actualRegex = '(?:actual\\stime=(\\d+\\.\\d+)\\.\\.(\\d+\\.\\d+)\\srows=(\\d+)\\sloops=(\\d+)|actual\\srows=(\\d+)\\sloops=(\\d+)|(never\\s+executed))';
       const optionalGroup = '?';
 
-      const a = new RegExp(
-        prefixRegex,
-        'gm',
-      );
+      const emptyLineMatches = new RegExp(emptyLineRegex).exec(line);
+      const headerMatches = new RegExp(headerRegex).exec(line);
+
       /*
        * Groups
        * 1: prefix
@@ -328,7 +330,7 @@ export class PlanService {
       const nodeRegex = new RegExp(
         prefixRegex +
         typeRegex +
-        '\\s+' +
+        '\\s*' +
         nonCapturingGroupOpen +
           (nonCapturingGroupOpen + estimationRegex + '\\s+' +
            openParenthesisRegex + actualRegex + closeParenthesisRegex +
@@ -337,7 +339,7 @@ export class PlanService {
           nonCapturingGroupOpen + estimationRegex + nonCapturingGroupClose +
           '|' +
           nonCapturingGroupOpen + openParenthesisRegex + actualRegex + closeParenthesisRegex + nonCapturingGroupClose +
-        nonCapturingGroupClose +
+        nonCapturingGroupClose + '*' +
         '\\s*$',
         'gm',
       );
@@ -386,7 +388,9 @@ export class PlanService {
       const extraRegex = /^(\s*)(\S.*\S)\s*$/g;
       const extraMatches = extraRegex.exec(line);
 
-      if (nodeMatches) {
+      if (emptyLineMatches || headerMatches) {
+        return;
+      } else if (nodeMatches && !cteMatches && !subMatches) {
         const prefix = nodeMatches[1];
         const neverExecuted = nodeMatches[13];
         const newNode: Node = new Node(nodeMatches[2]);