add additional PSTTask recurrence props

src/OutlookProperties.ts

@@ -262,10 +262,12 @@ export enum OutlookProperties {
   PidTagWeddingAnniversary = 0x3a41,
   PidLidPercentComplete = 0x00008102,
   PidLidTaskStatus = 0x00008101,
+  PidLidTaskDeadOccurrence = 0x00008109,
   PidLidTaskDateCompleted = 0x0000810f,
   PidLidTaskActualEffort = 0x00008110,
   PidLidTaskEstimatedEffort = 0x00008111,
   PidLidTaskVersion = 0x00008112,
+  PidLidTaskRecurrence = 0x00008116,
   PidLidTaskComplete = 0x0000811c,
   PidLidTaskOwner = 0x0000811f,
   PidLidTaskAssigner = 0x00008121,

src/PSTTask.class.ts

@@ -5,6 +5,7 @@ import { PSTDescriptorItem } from './PSTDescriptorItem.class'
 import { PSTMessage } from './PSTMessage.class'
 import { PSTTableBC } from './PSTTableBC.class'
 import { PSTFile } from './PSTFile.class'
+import { RecurrencePattern } from './RecurrencePattern.class'
 
 export class PSTTask extends PSTMessage {
   /**
@@ -215,6 +216,35 @@ export class PSTTask extends PSTMessage {
     )
   }
 
+  /**
+   * https://docs.microsoft.com/en-us/office/client-developer/outlook/mapi/pidlidtaskrecurrence-canonical-property
+   * @type {RecurrencePattern}
+   * @memberof PSTTask
+   */
+  public get taskRecurrencePattern(): RecurrencePattern | null {
+    const recurrenceBLOB = this.getBinaryItem(
+      this.pstFile.getNameToIdMapItem(
+        OutlookProperties.PidLidTaskRecurrence,
+        PSTFile.PSETID_Task
+      )
+    )
+    return recurrenceBLOB && new RecurrencePattern(recurrenceBLOB)
+  }
+
+  /**
+   * https://docs.microsoft.com/en-us/office/client-developer/outlook/mapi/pidlidtaskdeadoccurrence-canonical-property
+   * @type {boolean}
+   * @memberof PSTTask
+   */
+  public get taskDeadOccurrence(): boolean {
+    return this.getBooleanItem(
+      this.pstFile.getNameToIdMapItem(
+        OutlookProperties.PidLidTaskDeadOccurrence,
+        PSTFile.PSETID_Task
+      )
+    )
+  }
+
   /**
    * Indicates the role of the current user relative to the task.
    * https://msdn.microsoft.com/en-us/library/office/cc842113.aspx

src/RecurrencePattern.class.ts

@@ -0,0 +1,101 @@
+const OFFSETS = {
+  RecurFrequency: 4,
+  PatternType: 6,
+  FirstDateTime: 10,
+  Period: 14,
+  PatternTypeSpecific: 22,
+  EndType: 22,
+  OccurrenceCount: 26,
+  FirstDOW: 30,
+  StartDate: -8,
+  EndDate: -4,
+}
+
+export enum RecurFrequency {
+  Daily = 0x200a,
+  Weekly = 0x200b,
+  Monthly = 0x200c,
+  Yearly = 0x200d,
+}
+
+export enum PatternType {
+  Day = 0x0000,
+  Week = 0x0001,
+  Month = 0x0002,
+  MonthEnd = 0x0004,
+  MonthNth = 0x0003,
+}
+
+export enum EndType {
+  AfterDate = 0x00002021,
+  AfterNOccurrences = 0x00002022,
+  NeverEnd = 0x00002023,
+}
+
+export class RecurrencePattern {
+  recurFrequency: RecurFrequency
+  patternType: PatternType
+  firstDateTime: Date
+  period: number
+  endType: EndType
+  occurrenceCount: number
+  firstDOW: number
+  startDate: Date
+  endDate: Date
+
+  constructor(private buffer: Buffer) {
+    const bufferEnd = buffer.length
+    let patternTypeOffset = 0
+
+    this.recurFrequency = this.readInt(OFFSETS.RecurFrequency, 1)
+    this.patternType = this.readInt(OFFSETS.PatternType, 1)
+    this.firstDateTime = winToJsDate(this.readInt(OFFSETS.FirstDateTime, 2))
+    this.period = this.readInt(OFFSETS.Period, 2)
+
+    switch (this.patternType) {
+      case PatternType.Week:
+      case PatternType.Month:
+        patternTypeOffset = 4
+        break
+      case PatternType.MonthNth:
+        patternTypeOffset = 8
+        break
+    }
+
+    this.endType = this.readInt(OFFSETS.EndType + patternTypeOffset, 2)
+    this.occurrenceCount = this.readInt(
+      OFFSETS.OccurrenceCount + patternTypeOffset,
+      2
+    )
+    this.firstDOW = this.readInt(OFFSETS.FirstDOW + patternTypeOffset, 2)
+    this.startDate = winToJsDate(this.readInt(bufferEnd + OFFSETS.StartDate, 2))
+    this.endDate = winToJsDate(this.readInt(bufferEnd + OFFSETS.EndDate, 2))
+  }
+
+  public toJSON(): any {
+    return {
+      recurFrequency: RecurFrequency[this.recurFrequency],
+      patternType: PatternType[this.patternType],
+      firstDateTime: this.firstDateTime,
+      period: this.period,
+      endType: EndType[this.endType],
+      occurrenceCount: this.occurrenceCount,
+      firstDOW: this.firstDOW,
+      startDate: this.startDate,
+      endDate: this.endDate,
+    }
+  }
+
+  private readInt(offset: number, size: 1 | 2) {
+    switch (size) {
+      case 1:
+        return this.buffer.readInt16LE(offset)
+      case 2:
+        return this.buffer.readInt32LE(offset)
+    }
+  }
+}
+
+function winToJsDate(dateInt: number): Date {
+  return new Date(dateInt * 60 * 1000 - 1.16444736e13)
+}