feat: New methods startOfYear and endOfYear

README.md

@@ -166,6 +166,8 @@ export interface IUtils<TDate> {
 
   isWithinRange(value: TDate, range: [TDate, TDate]): boolean;
 
+  startOfYear(value: TDate): TDate;
+  endOfYear(value: TDate): TDate;
   startOfMonth(value: TDate): TDate;
   endOfMonth(value: TDate): TDate;
   startOfWeek(value: TDate): TDate;

__tests__/calculations.test.ts

@@ -66,6 +66,18 @@ describe("DateTime calculations", () => {
     );
   });
 
+  utilsTest("startOfYear", (date, utils, lib) => {
+    expect(utils.formatByString(utils.startOfYear(date), formats.dateTime[lib])).toBe(
+      "2018-01-01 00:00"
+    );
+  });
+
+  utilsTest("endOfYear", (date, utils, lib) => {
+    expect(utils.formatByString(utils.endOfYear(date), formats.dateTime[lib])).toBe(
+      "2018-12-31 23:59"
+    );
+  });
+
   utilsTest("startOfMonth", (date, utils, lib) => {
     expect(utils.formatByString(utils.startOfMonth(date), formats.dateTime[lib])).toBe(
       "2018-10-01 00:00"

__tests__/jalaali.test.ts

@@ -49,6 +49,22 @@ describe("Jalaali", () => {
     expect(jalaaliUtils.getWeekdays()).toEqual(["ش", "ی", "د", "س", "چ", "پ", "ج"]);
   });
 
+  it("Jalaali -- endOfYear", () => {
+    const date = jalaaliUtils.date(TEST_TIMESTAMP);
+
+    expect(jalaaliUtils.endOfYear(date).toISOString()).toEqual(
+      "2018-11-21T23:59:59.999Z"
+    );
+  });
+
+  it("Jalaali -- startOfYear", () => {
+    const date = jalaaliUtils.date(TEST_TIMESTAMP);
+
+    expect(jalaaliUtils.startOfYear(date).toISOString()).toEqual(
+      "2018-10-23T00:00:00.000Z"
+    );
+  });
+
   it("Jalaali -- endOfMonth", () => {
     const date = jalaaliUtils.date(TEST_TIMESTAMP);
 

__tests__/local-date-calculations.test.ts

@@ -49,6 +49,18 @@ describe("DateTime calculations", () => {
     );
   });
 
+  localDateutilsTest("startOfYear", (date, utils, lib) => {
+    expect(utils.formatByString(utils.startOfYear(date), formats.dateTime[lib])).toBe(
+      "2018-01-01 00:00"
+    );
+  });
+
+  localDateutilsTest("endOfYear", (date, utils, lib) => {
+    expect(utils.formatByString(utils.endOfYear(date), formats.dateTime[lib])).toBe(
+      "2018-12-31 23:59"
+    );
+  });
+
   localDateutilsTest("startOfMonth", (date, utils, lib) => {
     expect(utils.formatByString(utils.startOfMonth(date), formats.dateTime[lib])).toBe(
       "2018-10-01 00:00"

packages/core/IUtils.d.ts

@@ -109,6 +109,8 @@ export interface IUtils<TDate extends ExtendableDateType> {
 
   isWithinRange(value: TDate, range: [TDate, TDate]): boolean;
 
+  startOfYear(value: TDate): TDate;
+  endOfYear(value: TDate): TDate;
   startOfMonth(value: TDate): TDate;
   endOfMonth(value: TDate): TDate;
   startOfWeek(value: TDate): TDate;

packages/core/dev-utils.js

@@ -14,7 +14,7 @@ exports.createRollupConfig = (typescript) => {
       output: {
         file: `build/index.esm.js`,
         format: "esm",
-        exports: "auto"
+        exports: "auto",
       },
       plugins: [nodeResolve({ extensions }), typescriptPlugin({ typescript })],
     },
@@ -24,7 +24,7 @@ exports.createRollupConfig = (typescript) => {
       output: {
         file: `build/index.js`,
         format: "cjs",
-        exports: "auto"
+        exports: "auto",
       },
       plugins: [nodeResolve({ extensions }), typescriptPlugin({ typescript })],
     },

packages/date-fns-jalali/src/date-fns-jalali-utils.ts

@@ -248,6 +248,14 @@ export default class DateFnsJalaliUtils implements IUtils<Date> {
     return isSameHour(value, comparing);
   };
 
+  public startOfYear = (value: Date) => {
+    return startOfYear(value);
+  };
+
+  public endOfYear = (value: Date) => {
+    return endOfYear(value);
+  };
+
   public startOfMonth = (value: Date) => {
     return startOfMonth(value);
   };

packages/date-fns/src/date-fns-utils.ts

@@ -241,6 +241,14 @@ export default class DateFnsUtils implements IUtils<Date> {
     return isSameHour(value, comparing);
   };
 
+  public startOfYear = (value: Date) => {
+    return startOfYear(value);
+  };
+
+  public endOfYear = (value: Date) => {
+    return endOfYear(value);
+  };
+
   public startOfMonth = (value: Date) => {
     return startOfMonth(value);
   };

packages/dayjs/src/dayjs-utils.ts

@@ -273,6 +273,14 @@ export default class DayjsUtils<TDate extends Dayjs = Dayjs> implements IUtils<T
     return ampm === "am" ? "AM" : "PM";
   };
 
+  public startOfYear = (date: Dayjs) => {
+    return date.clone().startOf("year") as TDate;
+  };
+
+  public endOfYear = (date: Dayjs) => {
+    return date.clone().endOf("year") as TDate;
+  };
+
   public startOfMonth = (date: Dayjs) => {
     return date.clone().startOf("month") as TDate;
   };

packages/hijri/src/hijri-utils.ts

@@ -104,6 +104,14 @@ export default class MomentUtils extends DefaultMomentUtils {
     return date.daysInMonth();
   };
 
+  public startOfYear = (date: Moment) => {
+    return date.clone().startOf("iYear");
+  };
+
+  public endOfYear = (date: Moment) => {
+    return date.clone().endOf("iYear");
+  };
+
   public startOfMonth = (date: Moment) => {
     return date.clone().startOf("iMonth");
   };

packages/jalaali/src/jalaali-utils.ts

@@ -103,6 +103,14 @@ export default class MomentUtils extends DefaultMomentUtils {
     return date.daysInMonth();
   };
 
+  public startOfYear = (date: Moment) => {
+    return date.clone().startOf("jYear");
+  };
+
+  public endOfYear = (date: Moment) => {
+    return date.clone().endOf("jYear");
+  };
+
   public startOfMonth = (date: Moment) => {
     return date.clone().startOf("jMonth");
   };

packages/js-joda/src/js-joda-utils.ts

@@ -301,6 +301,14 @@ export default class JsJodaUtils implements IUtils<Temporal> {
     return datedate.isBefore(valuedate);
   }
 
+  startOfYear(date: Temporal) {
+    return Year.from(date).atMonth(1).atDay(1).atStartOfDay();
+  }
+
+  endOfYear(date: Temporal) {
+    return Year.from(date).atMonth(12).atEndOfMonth().atTime(LocalTime.MAX);
+  }
+
   startOfMonth(date: Temporal) {
     return YearMonth.from(date).atDay(1).atStartOfDay();
   }

packages/js-joda/type/index.d.ts

@@ -1,5 +1,5 @@
 declare module "@date-io/type" {
-  import {Temporal} from "@js-joda/core";
+  import { Temporal } from "@js-joda/core";
 
   export type DateType = Temporal;
 }

packages/luxon/src/luxon-utils.ts

@@ -282,6 +282,14 @@ export default class LuxonUtils implements IUtils<DateTime> {
     });
   };
 
+  public startOfYear = (value: DateTime) => {
+    return value.startOf("year");
+  };
+
+  public endOfYear = (value: DateTime) => {
+    return value.endOf("year");
+  };
+
   public startOfMonth = (value: DateTime) => {
     return value.startOf("month");
   };

packages/moment/src/moment-utils.ts

@@ -267,6 +267,14 @@ export default class MomentUtils implements IUtils<defaultMoment.Moment> {
     return ampm === "am" ? "AM" : "PM"; // fallback for de, ru, ...etc
   };
 
+  public startOfYear = (date: Moment) => {
+    return date.clone().startOf("year");
+  };
+
+  public endOfYear = (date: Moment) => {
+    return date.clone().endOf("year");
+  };
+
   public startOfMonth = (date: Moment) => {
     return date.clone().startOf("month");
   };