history filtering

2 files changed, 79 insertions, 3 deletions

diff --git a/internal/reports/daterange.go b/internal/reports/daterange.go
index adeb48b..040023e 100644
--- a/internal/reports/daterange.go
+++ b/internal/reports/daterange.go
@@ -67,16 +67,22 @@ func ParseDateRange(dateStr string) (DateRange, error) {
 		return dateRange, nil
 	}
 
+	// Check for "since YYYY-MM-DD" format
+	if strings.HasPrefix(lowerDateStr, "since ") {
+		return parseSinceDateRange(dateStr)
+	}
+
 	// Check for custom date range format: "YYYY-MM-DD to YYYY-MM-DD"
-	if strings.Contains(dateStr, " to ") {
+	if strings.Contains(lowerDateStr, " to ") {
 		return parseCustomDateRange(dateStr)
 	}
 
-	return DateRange{}, fmt.Errorf("unsupported date range: %s (supported: 'this week', 'this month', 'last week', 'last month', month names like 'february', 'month year' like 'july 2023', or 'YYYY-MM-DD to YYYY-MM-DD')", dateStr)
+	return DateRange{}, fmt.Errorf("unsupported date range: %s (supported: 'this week', 'this month', 'last week', 'last month', month names like 'february', 'month year' like 'july 2023', 'since YYYY-MM-DD', or 'YYYY-MM-DD to YYYY-MM-DD')", dateStr)
 }
 
 func parseCustomDateRange(dateStr string) (DateRange, error) {
-	parts := strings.Split(dateStr, " to ")
+	lowerDateStr := strings.ToLower(dateStr)
+	parts := strings.Split(lowerDateStr, " to ")
 	if len(parts) != 2 {
 		return DateRange{}, fmt.Errorf("invalid date range format: expected 'YYYY-MM-DD to YYYY-MM-DD'")
 	}
@@ -248,3 +254,28 @@ func getMonthRange(year int, month time.Month) DateRange {
 	}
 }
 
+func parseSinceDateRange(dateStr string) (DateRange, error) {
+	// Remove "since " prefix (case-insensitive)
+	lowerDateStr := strings.ToLower(dateStr)
+	if !strings.HasPrefix(lowerDateStr, "since ") {
+		return DateRange{}, fmt.Errorf("invalid since format: expected 'since YYYY-MM-DD'")
+	}
+	
+	dateOnly := strings.TrimSpace(dateStr[6:]) // Remove "since " prefix
+	
+	// Parse start date
+	startDate, err := time.Parse("2006-01-02", dateOnly)
+	if err != nil {
+		return DateRange{}, fmt.Errorf("invalid start date '%s' in since format: expected YYYY-MM-DD format", dateOnly)
+	}
+	
+	// Convert to UTC and set start time to beginning of day (00:00:00)
+	startUTC := time.Date(startDate.Year(), startDate.Month(), startDate.Day(), 0, 0, 0, 0, time.UTC)
+	
+	// No end date for "since" format - return zero time for End to indicate open-ended
+	return DateRange{
+		Start: startUTC,
+		End:   time.Time{}, // Zero time indicates no end date
+	}, nil
+}
+
diff --git a/internal/reports/daterange_test.go b/internal/reports/daterange_test.go
index 69b0e4a..97678b6 100644
--- a/internal/reports/daterange_test.go
+++ b/internal/reports/daterange_test.go
@@ -192,6 +192,46 @@ func TestParseDateRange(t *testing.T) {
 			input:   "july abcd",
 			wantErr: true,
 		},
+		{
+			name:    "since format",
+			input:   "since 2024-07-01",
+			wantErr: false,
+			validate: func(t *testing.T, dr DateRange) {
+				// Should start on July 1, 2024 with no end date
+				expectedStart := time.Date(2024, time.July, 1, 0, 0, 0, 0, time.UTC)
+				if !dr.Start.Equal(expectedStart) {
+					t.Errorf("Start = %v, want %v", dr.Start, expectedStart)
+				}
+				if !dr.End.IsZero() {
+					t.Errorf("End = %v, want zero time (no end date)", dr.End)
+				}
+			},
+		},
+		{
+			name:    "since format case insensitive",
+			input:   "SINCE 2024-12-25",
+			wantErr: false,
+			validate: func(t *testing.T, dr DateRange) {
+				// Should start on December 25, 2024 with no end date
+				expectedStart := time.Date(2024, time.December, 25, 0, 0, 0, 0, time.UTC)
+				if !dr.Start.Equal(expectedStart) {
+					t.Errorf("Start = %v, want %v", dr.Start, expectedStart)
+				}
+				if !dr.End.IsZero() {
+					t.Errorf("End = %v, want zero time (no end date)", dr.End)
+				}
+			},
+		},
+		{
+			name:    "since format invalid date",
+			input:   "since 2024-13-01",
+			wantErr: true,
+		},
+		{
+			name:    "since format missing date",
+			input:   "since",
+			wantErr: true,
+		},
 	}
 
 	for _, tt := range tests {
@@ -223,6 +263,11 @@ func TestParseDateRange(t *testing.T) {
 					return dateRange, nil
 				}
 
+				// Check for "since YYYY-MM-DD" format
+				if strings.HasPrefix(lowerDateStr, "since ") {
+					return parseSinceDateRange(dateStr)
+				}
+
 				// Check for custom date range format: "YYYY-MM-DD to YYYY-MM-DD"
 				if strings.Contains(dateStr, " to ") {
 					return parseCustomDateRange(dateStr)