Remember last state in reading mode

Localizable.xcstrings

@@ -660,6 +660,159 @@
         }
       }
     },
+    "Last: Repeat decreased to %@ · %@" : {
+      "comment" : "Reading mode status line for the last repeat counter decrease. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Wiederholung auf %1$@ verringert · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Repeat decreased to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Repeat increased to %@ · %@" : {
+      "comment" : "Reading mode status line for the last repeat counter increase. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Wiederholung auf %1$@ erhöht · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Repeat increased to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Repeat set to %@ · %@" : {
+      "comment" : "Reading mode status line for a directly set repeat counter. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Wiederholung auf %1$@ gesetzt · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Repeat set to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Row decreased to %@ · %@" : {
+      "comment" : "Reading mode status line for the last row counter decrease. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Reihe auf %1$@ verringert · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Row decreased to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Row increased to %@ · %@" : {
+      "comment" : "Reading mode status line for the last row counter increase. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Reihe auf %1$@ erhöht · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Row increased to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Row set to %@ · %@" : {
+      "comment" : "Reading mode status line for a directly set row counter. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Reihe auf %1$@ gesetzt · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Row set to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Stitches decreased to %@ · %@" : {
+      "comment" : "Reading mode status line for the last stitch counter decrease. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Maschen auf %1$@ verringert · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Stitches decreased to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Stitches increased to %@ · %@" : {
+      "comment" : "Reading mode status line for the last stitch counter increase. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Maschen auf %1$@ erhöht · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Stitches increased to %1$@ · %2$@"
+          }
+        }
+      }
+    },
+    "Last: Stitches set to %@ · %@" : {
+      "comment" : "Reading mode status line for a directly set stitch counter. The first placeholder is the new value and the second is the local time or date and time.",
+      "localizations" : {
+        "de" : {
+          "stringUnit" : {
+            "state" : "machine_translated",
+            "value" : "Zuletzt: Maschen auf %1$@ gesetzt · %2$@"
+          }
+        },
+        "en" : {
+          "stringUnit" : {
+            "state" : "new",
+            "value" : "Last: Stitches set to %1$@ · %2$@"
+          }
+        }
+      }
+    },
     "LoopLine" : {
       "comment" : "The name of the app.",
       "isCommentAutoGenerated" : true,
@@ -846,6 +999,7 @@
     },
     "of %lld" : {
       "comment" : "Text appended to the end of a counter value to indicate the total number of rows. The argument is the current row number, the second is the total number of rows.",
+      "extractionState" : "stale",
       "isCommentAutoGenerated" : true,
       "localizations" : {
         "de" : {
@@ -1198,6 +1352,7 @@
     },
     "REPEAT" : {
       "comment" : "Label for the number of repeats.",
+      "extractionState" : "stale",
       "isCommentAutoGenerated" : true,
       "localizations" : {
         "de" : {
@@ -1290,6 +1445,7 @@
     },
     "ROW" : {
       "comment" : "Label for the number of the current row.",
+      "extractionState" : "stale",
       "isCommentAutoGenerated" : true,
       "localizations" : {
         "de" : {
@@ -1515,6 +1671,7 @@
     },
     "STITCHES" : {
       "comment" : "Label for the number of stitches counter in the reading controls.",
+      "extractionState" : "stale",
       "isCommentAutoGenerated" : true,
       "localizations" : {
         "de" : {

LoopLine.xcodeproj/project.pbxproj

@@ -406,7 +406,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEVELOPMENT_TEAM = ZRUVWXD37Y;
 				ENABLE_APP_SANDBOX = YES;
 				ENABLE_PREVIEWS = YES;
@@ -450,7 +450,7 @@
 				ASSETCATALOG_COMPILER_APPICON_NAME = AppIcon;
 				CODE_SIGN_IDENTITY = "Apple Development";
 				CODE_SIGN_STYLE = Automatic;
-				CURRENT_PROJECT_VERSION = 4;
+				CURRENT_PROJECT_VERSION = 5;
 				DEVELOPMENT_TEAM = ZRUVWXD37Y;
 				ENABLE_APP_SANDBOX = YES;
 				ENABLE_PREVIEWS = YES;

LoopLine/Models/Project.swift

@@ -12,6 +12,13 @@ final class Project {
     var repeatCurrent: Int
     var currentStitch: Int = 0
     var repeatTotal: Int?
+    var selectedTrackingMetricRawValue: String = ReadingTrackingMetric.row.rawValue
+    var lastCounterMetricRawValue: String?
+    var lastCounterValue: Int?
+    var lastCounterChangeDirectionRawValue: String?
+    var lastCounterChangedAt: Date?
+    var lastPDFPageIndex: Int = 0
+    var lastPDFPageVerticalPosition: Double = 0
     var rows: [String]
     var sourceText: String?
     var sourceFilePath: String?

LoopLine/Models/ReadingTrackingMetric.swift

@@ -18,3 +18,101 @@ enum ReadingTrackingMetric: String, CaseIterable, Identifiable {
         }
     }
 }
+
+enum CounterChangeDirection: String {
+    case increased
+    case decreased
+    case set
+}
+
+struct LastCounterChange: Equatable {
+    let metric: ReadingTrackingMetric
+    let value: Int
+    let direction: CounterChangeDirection
+    let timestamp: Date
+}
+
+extension Project {
+    var lastCounterChange: LastCounterChange? {
+        guard let metricRawValue = lastCounterMetricRawValue,
+              let metric = ReadingTrackingMetric(rawValue: metricRawValue),
+              let value = lastCounterValue,
+              let directionRawValue = lastCounterChangeDirectionRawValue,
+              let direction = CounterChangeDirection(rawValue: directionRawValue),
+              let timestamp = lastCounterChangedAt else {
+            return nil
+        }
+
+        return LastCounterChange(
+            metric: metric,
+            value: value,
+            direction: direction,
+            timestamp: timestamp
+        )
+    }
+
+    func recordLastCounterChange(
+        metric: ReadingTrackingMetric,
+        value: Int,
+        direction: CounterChangeDirection,
+        timestamp: Date = .now
+    ) {
+        lastCounterMetricRawValue = metric.rawValue
+        lastCounterValue = value
+        lastCounterChangeDirectionRawValue = direction.rawValue
+        lastCounterChangedAt = timestamp
+    }
+
+    func clearLastCounterChange() {
+        lastCounterMetricRawValue = nil
+        lastCounterValue = nil
+        lastCounterChangeDirectionRawValue = nil
+        lastCounterChangedAt = nil
+    }
+}
+
+enum LastCounterChangeFormatter {
+    static func timestampText(
+        for date: Date,
+        now: Date = .now,
+        calendar: Calendar = .autoupdatingCurrent,
+        locale: Locale = .autoupdatingCurrent
+    ) -> String {
+        if calendar.isDate(date, inSameDayAs: now) {
+            return date.formatted(.dateTime.hour().minute().locale(locale))
+        }
+
+        return date.formatted(.dateTime.year().month(.abbreviated).day().hour().minute().locale(locale))
+    }
+
+    static func statusText(
+        for change: LastCounterChange,
+        now: Date = .now,
+        calendar: Calendar = .autoupdatingCurrent,
+        locale: Locale = .autoupdatingCurrent
+    ) -> String {
+        let value = change.value.formatted(.number.locale(locale))
+        let timestamp = timestampText(for: change.timestamp, now: now, calendar: calendar, locale: locale)
+
+        switch (change.metric, change.direction) {
+        case (.row, .increased):
+            return String(localized: "Last: Row increased to \(value) · \(timestamp)", comment: "Reading mode status line for the last row counter increase. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.row, .decreased):
+            return String(localized: "Last: Row decreased to \(value) · \(timestamp)", comment: "Reading mode status line for the last row counter decrease. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.row, .set):
+            return String(localized: "Last: Row set to \(value) · \(timestamp)", comment: "Reading mode status line for a directly set row counter. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.stitches, .increased):
+            return String(localized: "Last: Stitches increased to \(value) · \(timestamp)", comment: "Reading mode status line for the last stitch counter increase. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.stitches, .decreased):
+            return String(localized: "Last: Stitches decreased to \(value) · \(timestamp)", comment: "Reading mode status line for the last stitch counter decrease. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.stitches, .set):
+            return String(localized: "Last: Stitches set to \(value) · \(timestamp)", comment: "Reading mode status line for a directly set stitch counter. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.repeatCount, .increased):
+            return String(localized: "Last: Repeat increased to \(value) · \(timestamp)", comment: "Reading mode status line for the last repeat counter increase. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.repeatCount, .decreased):
+            return String(localized: "Last: Repeat decreased to \(value) · \(timestamp)", comment: "Reading mode status line for the last repeat counter decrease. The first placeholder is the new value and the second is the local time or date and time.")
+        case (.repeatCount, .set):
+            return String(localized: "Last: Repeat set to \(value) · \(timestamp)", comment: "Reading mode status line for a directly set repeat counter. The first placeholder is the new value and the second is the local time or date and time.")
+        }
+    }
+}