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:saprkles: Adding CoreData Helper Classes

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- Also adding lecturer entity and relationship between event and lecturers.
- Preparation for CoreData refactoring
This commit is contained in:
Patrick Müller
2021-02-10 19:17:11 +01:00
committed by Patrick Müller
parent e5ecb6bb60
commit f50ba8f19d
9 changed files with 293 additions and 20 deletions
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DHBW-Service/Utility/RaPlaFetcher.swift
+71 -16
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@@ -17,6 +17,12 @@ class RaPlaFetcher {
var location: String = "" //LOCATION
var category: String = "" //CATEGORIES
var uid: String = "" //UID
var lecturers: [LecturerObj] = [] //ATTENDEE
}
public class LecturerObj {
var name: String = ""
var email: String = ""
}
// Get the RaPla file from the given URL and save the events to CoreData
@@ -68,9 +74,24 @@ class RaPlaFetcher {
var events: [iCalEvent] = []
for eventString in eventStrings {
let lines = eventString.components(separatedBy: .newlines)
var lines = eventString.components(separatedBy: .newlines)
// Remove all blank lines that somehow are generated by the .components function
lines = removeBlankLines(lines: lines)
let evt = iCalEvent()
// Iterate over all lines and merge lines that have been split by rapla first
for lineNr in 0...lines.count-1 {
if(lines[lineNr].hasPrefix(" ")){
lines[lineNr] = String(lines[lineNr].dropFirst())
lines[lineNr-1].append(lines[lineNr])
lines[lineNr] = ""
}
}
// Remove all blank lines again as we produced some while merging the lines
lines = removeBlankLines(lines: lines)
for line in lines {
var lineWithoutPrefix = line
if(!line.contains(":")) {
@@ -82,7 +103,7 @@ class RaPlaFetcher {
//Date format: 20181101T080000
let dateFormatter = DateFormatter()
if(lineWithoutPrefix.contains("Z")){
dateFormatter.dateFormat = "yyyyMMdd'T'HHmmssZ"
dateFormatter.dateFormat = "yyyyMMdd'T'HHmmss'Z'"
} else {
dateFormatter.dateFormat = "yyyyMMdd'T'HHmmss"
}
@@ -91,7 +112,7 @@ class RaPlaFetcher {
} else if(line.hasPrefix("DTEND")){
let dateFormatter = DateFormatter()
if(lineWithoutPrefix.contains("Z")){
dateFormatter.dateFormat = "yyyyMMdd'T'HHmmssZ"
dateFormatter.dateFormat = "yyyyMMdd'T'HHmmss'Z'"
} else {
dateFormatter.dateFormat = "yyyyMMdd'T'HHmmss"
}
@@ -107,6 +128,22 @@ class RaPlaFetcher {
evt.category = lineWithoutPrefix
} else if(line.hasPrefix("UID")){
evt.uid = lineWithoutPrefix
} else if(line.hasPrefix("ATTENDEE;ROLE=REQ-PARTICIPANT;")) {
var lecturerName = line
let begin = lecturerName.firstIndex(of: "\"")!
lecturerName.removeSubrange(lecturerName.startIndex...begin)
let end = lecturerName.lastIndex(of: "\"")!
lecturerName = String(lecturerName[..<end])
let lecturerEmail = String(lineWithoutPrefix[String.Index(utf16Offset: 7, in: lineWithoutPrefix)..<lineWithoutPrefix.endIndex])
let lecturer = LecturerObj()
lecturer.name = lecturerName
lecturer.email = lecturerEmail
evt.lecturers.append(lecturer)
}
}
@@ -119,8 +156,8 @@ class RaPlaFetcher {
// Save the given iCalEvent objects to CoreData
// Updates the events if they already exist and deletes old (/invalid) ones
private class func saveToCoreData(eventObjects: [iCalEvent]) -> Bool{
let existingEvents = UtilityFunctions.getCoreDataObject(entity: "RaPlaEvent", sortDescriptors: [])
var existingEventsDict: [String:NSManagedObject] = [:]
let existingEvents: [RaPlaEvent] = [] //RaPlaEvent.getAll()
var existingEventsDict: [String:RaPlaEvent] = [:]
for event in existingEvents {
existingEventsDict[event.value(forKey: "uid") as! String] = event
}
@@ -128,23 +165,28 @@ class RaPlaFetcher {
for event in eventObjects {
// If the event already exists locally, update it. Otherwise, create a new record
let evt: NSManagedObject
let evt: RaPlaEvent
if existingEventsDict.keys.contains(event.uid) {
evt = existingEventsDict[event.uid]!
} else {
let entity = NSEntityDescription.entity(forEntityName: "RaPlaEvent", in: PersistenceController.shared.context)!
evt = NSManagedObject(entity: entity, insertInto: PersistenceController.shared.context)
evt = RaPlaEvent(context: PersistenceController.shared.context)
// Set default values for new object
evt.setValue(false, forKey: "isHidden")
evt.isHidden = false
}
evt.startDate = event.startDate
evt.endDate = event.endDate
evt.summary = event.summary
evt.descr = event.description
evt.location = event.location
evt.category = event.category
evt.uid = event.uid
for lecturer in event.lecturers {
let lect = Lecturer(context: PersistenceController.shared.context)
lect.name = lecturer.name
lect.email = lecturer.email
lect.event = evt
}
evt.setValue(event.startDate, forKey: "startDate")
evt.setValue(event.endDate, forKey: "endDate")
evt.setValue(event.summary, forKey: "summary")
evt.setValue(event.description, forKey: "descr")
evt.setValue(event.location, forKey: "location")
evt.setValue(event.category, forKey: "category")
evt.setValue(event.uid, forKey: "uid")
}
// Now we also have to delete locally stored events that have been deleted from RaPla
@@ -160,4 +202,17 @@ class RaPlaFetcher {
return true
}
private class func removeBlankLines(lines: [String]) -> [String] {
var newLines = lines
// Remove all blank lines that somehow are generated by the .components function
for line in newLines {
if(line.isEmpty){
newLines.remove(at: newLines.firstIndex(of: line)!)
}
}
return newLines
}
}