Move db operations back to db module

lib/import-export/import-from-csv.js

@@ -1,6 +1,6 @@
 import csvParser from 'csvtojson'
 import isObject from 'isobject'
-import { db, getCycleDay } from '../../db'
+import { schema, tryToImportWithDelete, tryToImportWithoutDelete } from '../../db'
 import getColumnNamesForCsv from './get-csv-column-names'
 
 export default async function importCsv(csv, deleteFirst) {
@@ -23,12 +23,11 @@ export default async function importCsv(csv, deleteFirst) {
     return Number(val)
   }
 
-  const cycleDayDbSchema = db.schema.find(x => x.name === 'CycleDay').properties
   const config = {
     ignoreEmpty: true,
     colParser: getColumnNamesForCsv().reduce((acc, colName) => {
       const path = colName.split('.')
-      const dbType = getDbType(cycleDayDbSchema, path)
+      const dbType = getDbType(schema.CycleDay, path)
       acc[colName] = item => {
         if (item === '') return null
         return parseFuncs[dbType](item)
@@ -45,29 +44,9 @@ export default async function importCsv(csv, deleteFirst) {
   putNullForEmptySymptoms(cycleDays)
 
   if (deleteFirst) {
-    db.write(() => {
-      db.delete(db.objects('CycleDay'))
-      cycleDays.forEach(tryToCreateCycleDay)
-    })
+    tryToImportWithDelete(cycleDays)
   } else {
-    db.write(() => {
-      cycleDays.forEach((day, i) => {
-        const existing = getCycleDay(day.date)
-        if (existing) {
-          db.delete(existing)
-        }
-        tryToCreateCycleDay(day, i)
-      })
-    })
-  }
-}
-
-function tryToCreateCycleDay(day, i) {
-  try {
-    db.create('CycleDay', day)
-  } catch (err) {
-    const msg = `Line ${i + 1}(${day.date}): ${err.message}`
-    throw new Error(msg)
+    tryToImportWithoutDelete(cycleDays)
   }
 }
 
@@ -99,6 +78,5 @@ function putNullForEmptySymptoms(data) {
 function getDbType(modelProperties, path) {
   if (path.length === 1) return modelProperties[path[0]].type
   const modelName = modelProperties[path[0]].objectType
-  const model = db.schema.find(x => x.name === modelName)
-  return getDbType(model.properties, path.slice(1))
+  return getDbType(schema[modelName], path.slice(1))
 }