feat: implement flexible date input for getEvents() method

src/DateNormalizer.ts

@@ -0,0 +1,80 @@
+import { moment } from "obsidian";
+
+// Type for flexible date input
+export type FlexibleDateInput = string | moment.Moment | Date;
+
+/**
+ * Handles normalization of various date input types to standardized string format
+ */
+export class DateNormalizer {
+  /**
+   * Normalizes a single date input to YYYY-MM-DD string format
+   * @param dateInput - Can be a string, moment object, or Date object
+   * @returns Normalized date string in YYYY-MM-DD format
+   * @throws Error if the input is invalid or unsupported
+   */
+  static normalizeDateInput(dateInput: FlexibleDateInput): string {
+    if (dateInput === null || dateInput === undefined) {
+      throw new Error("Date input cannot be null or undefined");
+    }
+
+    // Handle moment objects
+    if (moment.isMoment(dateInput)) {
+      return dateInput.format('YYYY-MM-DD');
+    }
+
+    // Handle Date objects
+    if (dateInput instanceof Date) {
+      return moment(dateInput).format('YYYY-MM-DD');
+    }
+
+    // Handle strings
+    if (typeof dateInput === 'string') {
+      // If already in YYYY-MM-DD format, return as-is
+      if (/^\d{4}-\d{2}-\d{2}$/.test(dateInput)) {
+        return dateInput;
+      }
+
+      // Try to parse the string with moment
+      const parsed = moment(dateInput);
+      if (parsed.isValid()) {
+        return parsed.format('YYYY-MM-DD');
+      }
+
+      throw new Error(`Invalid date string: ${dateInput}`);
+    }
+
+    throw new Error(`Unsupported date input type: ${typeof dateInput}`);
+  }
+
+  /**
+   * Normalizes an array of flexible date inputs to YYYY-MM-DD string format
+   * @param dateInputs - Array of dates in various formats
+   * @returns Array of normalized date strings in YYYY-MM-DD format
+   * @throws Error if any individual date input is invalid
+   */
+  static normalizeDateInputs(dateInputs: FlexibleDateInput[]): string[] {
+    return dateInputs.map(this.normalizeDateInput);
+  }
+
+  /**
+   * Validates that a date input is supported (without parsing)
+   * @param dateInput - Input to validate
+   * @returns true if the input type is supported, false otherwise
+   */
+  static isSupportedType(dateInput: any): dateInput is FlexibleDateInput {
+    return (
+      typeof dateInput === 'string' ||
+      moment.isMoment(dateInput) ||
+      dateInput instanceof Date
+    );
+  }
+
+  /**
+   * Gets a human-readable description of supported date formats
+   * @returns String describing supported formats
+   */
+  static getSupportedFormatsDescription(): string {
+    return "Supported formats: YYYY-MM-DD strings, moment objects, Date objects, or parseable date strings (e.g., '2025/03/01', 'March 1, 2025')";
+  }
+}

src/icalUtils.ts

@@ -1,4 +1,4 @@
-const ical = require('node-ical');
+import * as ical from 'node-ical';
 import { tz } from 'moment-timezone';
 import { moment } from "obsidian";
 
@@ -167,7 +167,7 @@ export function parseIcs(ics: string) {
   const data = ical.parseICS(ics);
   const vevents = [];
 
-  for (let i in data) {
+  for (const i in data) {
     if (data[i].type != "VEVENT")
       continue;
     vevents.push(data[i]);

src/main.ts

@@ -20,7 +20,8 @@ import {
   request
 } from 'obsidian';
 import { parseIcs, filterMatchingEvents, extractMeetingInfo } from './icalUtils';
-import { IEvent, IAttendee } from './IEvent';
+import { IEvent } from './IEvent';
+import { DateNormalizer, FlexibleDateInput } from './DateNormalizer';
 
 export default class ICSPlugin extends Plugin {
   data: ICSSettings;
@@ -68,13 +69,23 @@ export default class ICSPlugin extends Plugin {
   }
 
 
-  async getEvents(...dates: string[]): Promise<IEvent[]> {
+  async getEvents(...dates: FlexibleDateInput[]): Promise<IEvent[]> {
     if (dates.length === 0 || dates.some(date => !date)) {
-      new Notice("⚠️ ICS Plugin: No valid date provided to getEvents(). Please ensure a proper date is passed in the format 'YYYY-MM-DD'. Using the current date.", 10000);
+      new Notice(`⚠️ ICS Plugin: No valid date provided to getEvents(). ${DateNormalizer.getSupportedFormatsDescription()}`, 10000);
     }
 
-    let events: IEvent[] = [];
-    let errorMessages: string[] = []; // To store error messages
+    // Normalize all date inputs to YYYY-MM-DD string format
+    let normalizedDates: string[];
+    try {
+      normalizedDates = DateNormalizer.normalizeDateInputs(dates);
+    } catch (error) {
+      new Notice(`⚠️ ICS Plugin: Error parsing date inputs: ${error.message}`, 10000);
+      console.error("Date parsing error:", error);
+      return [];
+    }
+
+    const events: IEvent[] = [];
+    const errorMessages: string[] = []; // To store error messages
 
     for (const calendar in this.data.calendars) {
       const calendarSetting = this.data.calendars[calendar];
@@ -92,16 +103,16 @@ export default class ICSPlugin extends Plugin {
           // Existing logic for remote URLs
           icsArray = parseIcs(await request({ url: calendarSetting.icsUrl }));
         }
-      } catch (error) {
-        console.error(`Error processing calendar ${calendarSetting.icsName}: ${error}`);
+      } catch (processingError) {
+        console.error(`Error processing calendar ${calendarSetting.icsName}: ${processingError}`);
         errorMessages.push(`Error processing calendar "${calendarSetting.icsName}"`);
       }
 
-      var dateEvents;
+      let dateEvents;
 
       // Exception handling for parsing and filtering
       try {
-        dateEvents = dateEvents = filterMatchingEvents(icsArray, dates, calendarSetting.format.showOngoing)
+        dateEvents = filterMatchingEvents(icsArray, normalizedDates, calendarSetting.format.showOngoing)
           .filter(e => this.excludeTransparentEvents(e, calendarSetting))
           .filter(e => this.excludeDeclinedEvents(e, calendarSetting));
 

tests/DateNormalizer.test.ts

@@ -0,0 +1,230 @@
+import { DateNormalizer, FlexibleDateInput } from '../src/DateNormalizer';
+import { moment } from 'obsidian';
+
+describe('DateNormalizer', () => {
+  describe('normalizeDateInput', () => {
+    describe('string inputs', () => {
+      it('should handle YYYY-MM-DD format (already normalized)', () => {
+        const result = DateNormalizer.normalizeDateInput('2025-03-01');
+        expect(result).toBe('2025-03-01');
+      });
+
+      it('should parse and normalize various string formats', () => {
+        const testCases = [
+          { input: '2025/03/01', expected: '2025-03-01' },
+          { input: '03/01/2025', expected: '2025-03-01' },
+          { input: 'March 1, 2025', expected: '2025-03-01' },
+          { input: '1 Mar 2025', expected: '2025-03-01' },
+          { input: '2025-03-01T12:30:00', expected: '2025-03-01' },
+          { input: '2025-03-01T12:30:00Z', expected: '2025-03-01' }
+        ];
+
+        testCases.forEach(({ input, expected }) => {
+          const result = DateNormalizer.normalizeDateInput(input);
+          expect(result).toBe(expected);
+        });
+      });
+
+      it('should throw error for invalid date strings', () => {
+        const invalidDates = [
+          'invalid-date',
+          'not-a-date',
+          'foo bar',
+          ''
+        ];
+
+        invalidDates.forEach(invalidDate => {
+          expect(() => DateNormalizer.normalizeDateInput(invalidDate))
+            .toThrow(`Invalid date string: ${invalidDate}`);
+        });
+      });
+
+      it('should handle edge case invalid dates that moment accepts', () => {
+        // Note: moment is quite permissive - these dates are technically invalid
+        // but moment will try to parse them, so we test that they at least return something
+        const edgeCaseDates = [
+          '2025-13-01', // Invalid month - moment converts to 2026-01-01
+          '2025-02-30'  // Invalid day for February - moment converts to 2025-03-02
+        ];
+
+        edgeCaseDates.forEach(edgeDate => {
+          // These should not throw, but should return some normalized date
+          const result = DateNormalizer.normalizeDateInput(edgeDate);
+          expect(typeof result).toBe('string');
+          expect(result).toMatch(/^\d{4}-\d{2}-\d{2}$/);
+        });
+      });
+    });
+
+    describe('moment object inputs', () => {
+      it('should handle moment objects', () => {
+        const momentObj = moment('2025-03-01T12:30:00');
+        const result = DateNormalizer.normalizeDateInput(momentObj);
+        expect(result).toBe('2025-03-01');
+      });
+
+      it('should handle moment objects with different timezones', () => {
+        const momentUtc = moment.utc('2025-03-01T23:30:00');
+        const result = DateNormalizer.normalizeDateInput(momentUtc);
+        expect(result).toBe('2025-03-01');
+      });
+
+      it('should handle moment objects created from different sources', () => {
+        const fromString = moment('March 1, 2025');
+        const fromArray = moment([2025, 2, 1]); // month is 0-indexed in moment
+
+        expect(DateNormalizer.normalizeDateInput(fromString)).toBe('2025-03-01');
+        expect(DateNormalizer.normalizeDateInput(fromArray)).toBe('2025-03-01');
+      });
+    });
+
+    describe('Date object inputs', () => {
+      it('should handle Date objects', () => {
+        const dateObj = new Date('2025-03-01T12:30:00');
+        const result = DateNormalizer.normalizeDateInput(dateObj);
+        expect(result).toBe('2025-03-01');
+      });
+
+      it('should handle Date objects with different times', () => {
+        const morningDate = new Date('2025-03-01T06:00:00');
+        const eveningDate = new Date('2025-03-01T18:30:00');
+
+        expect(DateNormalizer.normalizeDateInput(morningDate)).toBe('2025-03-01');
+        expect(DateNormalizer.normalizeDateInput(eveningDate)).toBe('2025-03-01');
+      });
+    });
+
+    describe('error handling', () => {
+      it('should throw error for null input', () => {
+        expect(() => DateNormalizer.normalizeDateInput(null as any))
+          .toThrow('Date input cannot be null or undefined');
+      });
+
+      it('should throw error for undefined input', () => {
+        expect(() => DateNormalizer.normalizeDateInput(undefined as any))
+          .toThrow('Date input cannot be null or undefined');
+      });
+
+      it('should throw error for unsupported input types', () => {
+        const unsupportedInputs = [
+          123,
+          true,
+          false,
+          {},
+          [],
+          Symbol('test')
+        ];
+
+        unsupportedInputs.forEach(input => {
+          expect(() => DateNormalizer.normalizeDateInput(input as any))
+            .toThrow(`Unsupported date input type: ${typeof input}`);
+        });
+      });
+    });
+  });
+
+  describe('normalizeDateInputs', () => {
+    it('should handle arrays of mixed input types', () => {
+      const inputs: FlexibleDateInput[] = [
+        '2025-03-01',
+        moment('2025-03-02'),
+        new Date('2025-03-03T12:00:00'),
+        '2025/03/04',
+        'March 5, 2025'
+      ];
+
+      const results = DateNormalizer.normalizeDateInputs(inputs);
+      expect(results).toEqual([
+        '2025-03-01',
+        '2025-03-02',
+        '2025-03-03',
+        '2025-03-04',
+        '2025-03-05'
+      ]);
+    });
+
+    it('should handle empty arrays', () => {
+      const results = DateNormalizer.normalizeDateInputs([]);
+      expect(results).toEqual([]);
+    });
+
+    it('should propagate errors from individual date parsing', () => {
+      const inputs: FlexibleDateInput[] = ['2025-03-01', 'invalid-date'];
+      expect(() => DateNormalizer.normalizeDateInputs(inputs))
+        .toThrow('Invalid date string: invalid-date');
+    });
+
+    it('should handle single-element arrays', () => {
+      const results = DateNormalizer.normalizeDateInputs([moment('2025-03-01')]);
+      expect(results).toEqual(['2025-03-01']);
+    });
+  });
+
+  describe('isSupportedType', () => {
+    it('should return true for supported types', () => {
+      const supportedInputs = [
+        '2025-03-01',
+        moment('2025-03-01'),
+        new Date('2025-03-01'),
+        'March 1, 2025',
+        '2025/03/01'
+      ];
+
+      supportedInputs.forEach(input => {
+        expect(DateNormalizer.isSupportedType(input)).toBe(true);
+      });
+    });
+
+    it('should return false for unsupported types', () => {
+      const unsupportedInputs = [
+        123,
+        true,
+        null,
+        undefined,
+        {},
+        [],
+        Symbol('test')
+      ];
+
+      unsupportedInputs.forEach(input => {
+        expect(DateNormalizer.isSupportedType(input)).toBe(false);
+      });
+    });
+  });
+
+  describe('getSupportedFormatsDescription', () => {
+    it('should return a helpful description string', () => {
+      const description = DateNormalizer.getSupportedFormatsDescription();
+      expect(typeof description).toBe('string');
+      expect(description.length).toBeGreaterThan(0);
+      expect(description).toContain('YYYY-MM-DD');
+      expect(description).toContain('moment');
+      expect(description).toContain('Date');
+    });
+  });
+
+  describe('integration scenarios', () => {
+    it('should handle Templater-style usage patterns', () => {
+      // Simulate common Templater scenarios
+      const fileTitle = '20250301'; // YYYYMMDD format
+      const momentFromTitle = moment(fileTitle, 'YYYYMMDD');
+      const result = DateNormalizer.normalizeDateInput(momentFromTitle);
+      expect(result).toBe('2025-03-01');
+    });
+
+    it('should handle date ranges', () => {
+      const startDate = '2025-03-01';
+      const endDate = moment('2025-03-07');
+
+      const results = DateNormalizer.normalizeDateInputs([startDate, endDate]);
+      expect(results).toEqual(['2025-03-01', '2025-03-07']);
+    });
+
+    it('should handle timezone edge cases', () => {
+      // Test dates around timezone boundaries
+      const utcDate = new Date('2025-03-01T23:59:59Z');
+      const result = DateNormalizer.normalizeDateInput(utcDate);
+      expect(result).toBe('2025-03-01'); // Should be same day regardless of local timezone
+    });
+  });
+});

tests/icalUtils.test.ts

@@ -1,4 +1,5 @@
 import { parseIcs, filterMatchingEvents, extractMeetingInfo } from '../src/icalUtils';
+import { moment } from 'obsidian';
 
 describe('icalUtils', () => {
   describe('parseIcs', () => {
@@ -197,4 +198,6 @@ END:VCALENDAR`;
       expect(results[3]).toHaveLength(1); // Should appear
     });
   });
+
+
 });