Fix parsing for plans w/ spaces at beginning of Output lines

Fixes #611

src/services/__tests__/from-text.spec.ts

@@ -21,7 +21,7 @@ tests.forEach((planTest: string) => {
       const planExpect = fs.readFileSync(planExpectFile, { encoding: "utf-8" })
 
       const planService = new PlanService()
-      const r = planService.fromSource(planText)
+      const r = planService.fromSource(planService.cleanupSource(planText))
       expect(r).toMatchObject(JSON.parse(planExpect))
     })
   })

src/services/__tests__/from-text/38-expect

@@ -0,0 +1,11 @@
+{
+  "Plan": {
+    "Node Type": "Nested Loop Join",
+    "Plans": [{
+      "Node Type": "Bitmap Heap Scan",
+      "Plans": [{
+        "Node Type": "Bitmap Index Scan"
+      }]
+    }]
+  }
+}

src/services/__tests__/from-text/38-plan

@@ -0,0 +1,8 @@
+Not a real plan. Showing how line breaks (with empty space at the begining) in an Output can break parsing.
+                                                                    QUERY PLAN                                                                     
+═══════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════════
+ Nested Loop Left Join  (cost=11.95..28.52 rows=5 width=157)
+   ->  Bitmap Heap Scan on public.rel_users_exams  (cost=11.80..20.27 rows=5 width=52)
+         Output: rel_users_exams.user_username, rel_users_exams.exam_id,
+ rel_users_exams.started_at, rel_users_exams.finished_at
+         ->  Bitmap Index Scan on rel_users_exams_pkey  (cost=0.00..11.80 rows=5 width=0)

src/services/plan-service.ts

@@ -462,6 +462,10 @@ export class PlanService {
       return closingParIndex != -1 && closingParIndex < openingParIndex
     }
 
+    const sameIndent = (line1: string, line2: string) => {
+      return line1.search(/\S/) == line2.search(/\S/)
+    }
+
     _.each(lines, (line: string) => {
       if (countChar(line, /\)/g) > countChar(line, /\(/g)) {
         // if there more closing parenthesis this means that it's the
@@ -483,6 +487,14 @@ export class PlanService {
         } else {
           out.push(line)
         }
+      } else if (
+        0 < out.length &&
+        out[out.length - 1].match(/^\s*Output/i) &&
+        !sameIndent(out[out.length - 1], line)
+      ) {
+        // If previous line was Output and current line is not same indent
+        // (which would mean a new information line)
+        out[out.length - 1] += line
       } else {
         out.push(line)
       }