Saving index per user as TSV. Refactoring.

package-lock.json

@@ -461,6 +461,35 @@
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       "integrity": "sha1-lGfQMsOM+u+58teVASUwYvh/ob0="
     },
+    "csv": {
+      "version": "3.1.0",
+      "resolved": "https://registry.npmjs.org/csv/-/csv-3.1.0.tgz",
+      "integrity": "sha512-SfnePMkhjljB7ehvubZESGjgrnM7V/gBe5ubZWKxeKwgmTl/HtVCdfSaGRgH/i/vG7qJaSLMpP0krNbAuunRBg==",
+      "requires": {
+        "csv-generate": "2.0.2",
+        "csv-parse": "2.5.0",
+        "csv-stringify": "3.1.1",
+        "stream-transform": "1.0.2"
+      }
+    },
+    "csv-generate": {
+      "version": "2.0.2",
+      "resolved": "https://registry.npmjs.org/csv-generate/-/csv-generate-2.0.2.tgz",
+      "integrity": "sha512-oyidhQ/sQcqKOyt+hRnL9oiqFFWsEkOwBE7tEV3pwku6dSuFUQqTGfhYXH/HZ3rKy8xBtcrwsspmXVo+LPijuA=="
+    },
+    "csv-parse": {
+      "version": "2.5.0",
+      "resolved": "https://registry.npmjs.org/csv-parse/-/csv-parse-2.5.0.tgz",
+      "integrity": "sha512-4OcjOJQByI0YDU5COYw9HAqjo8/MOLLmT9EKyMCXUzgvh30vS1SlMK+Ho84IH5exN44cSnrYecw/7Zpu2m4lkA=="
+    },
+    "csv-stringify": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/csv-stringify/-/csv-stringify-3.1.1.tgz",
+      "integrity": "sha512-Ni9r/BdQM2cGnWzwAP09zp12LVOAMHLJ86azNHGC7s4OUo2WidGfcM3QwYEjD8c4ELCL/a4AzfIsVCzroeys+g==",
+      "requires": {
+        "lodash.get": "4.4.2"
+      }
+    },
     "dashdash": {
       "version": "1.14.1",
       "resolved": "https://registry.npmjs.org/dashdash/-/dashdash-1.14.1.tgz",
@@ -1444,6 +1473,11 @@
       "resolved": "https://registry.npmjs.org/lodash/-/lodash-4.17.5.tgz",
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     },
+    "lodash.get": {
+      "version": "4.4.2",
+      "resolved": "https://registry.npmjs.org/lodash.get/-/lodash.get-4.4.2.tgz",
+      "integrity": "sha1-LRd/ZS+jHpObRDjVNBSZ36OCXpk="
+    },
     "lru-cache": {
       "version": "4.1.2",
       "resolved": "https://registry.npmjs.org/lru-cache/-/lru-cache-4.1.2.tgz",
@@ -2146,6 +2180,11 @@
         "tweetnacl": "0.14.5"
       }
     },
+    "stream-transform": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/stream-transform/-/stream-transform-1.0.2.tgz",
+      "integrity": "sha512-LNcZSF01PZ+bM0OqwPY7UHPiKoxSmLGHAcqakvh01DCU98ONEslLORdyBPdmTqjTpZSfCiaYLV4sci9y5M47oA=="
+    },
     "string-width": {
       "version": "2.1.1",
       "resolved": "https://registry.npmjs.org/string-width/-/string-width-2.1.1.tgz",