Adds EP pattern and tests

__tests__/circulars.ts

@@ -71,6 +71,7 @@ describe('parseEventFromSubject', () => {
   const lvkEvent = 'LIGO/Virgo S200224ca'
   const sgrEvent = 'SGR 1935+2154'
   const ztfEvent = 'ZTF23aabmzlp'
+  const epEvent = 'EP241119a'
 
   test('handles nonsense subject cases', () => {
     expect(parseEventFromSubject('zawxdrcftvgbhnjm')).toBe(undefined)
@@ -230,6 +231,53 @@ describe('parseEventFromSubject', () => {
     })
   })
 
+  describe('EP', () => {
+    test('handles EP event names with space', () => {
+      const epSubject = 'EP 241119a: Global MASTER-Net observations report'
+      expect(parseEventFromSubject(epSubject)).toBe(epEvent)
+    })
+
+    test('handles EP event names with space in misc positions', () => {
+      const epSubjectWithSpace =
+        'Global MASTER-Net EP 241119a observations report'
+      expect(parseEventFromSubject(epSubjectWithSpace)).toBe(epEvent)
+    })
+
+    test('handles EP event names without space', () => {
+      const epSubjectWithNoSpace = 'EP241119a EP detection'
+      expect(parseEventFromSubject(epSubjectWithNoSpace)).toBe(epEvent)
+    })
+
+    test('handles EP event names without spaces in misc positions', () => {
+      const epSubjectWithSpace = 'EP detection of EP241119a GRB'
+      expect(parseEventFromSubject(epSubjectWithSpace)).toBe(epEvent)
+    })
+
+    test('handles EP event name with an underscore', () => {
+      const epSubjectWithUnderscore =
+        'EP_241119a: Global MASTER-Net observations report'
+      expect(parseEventFromSubject(epSubjectWithUnderscore)).toBe(epEvent)
+    })
+
+    test('handles EP event names with an underscore in misc positions', () => {
+      const epSubjectWithUnderscore =
+        'Global MASTER-Net EP_241119a observations report'
+      expect(parseEventFromSubject(epSubjectWithUnderscore)).toBe(epEvent)
+    })
+
+    test('handles EP event name with a hyphen', () => {
+      const epSubjectWithHyphen =
+        'EP-241119a: Global MASTER-Net observations report'
+      expect(parseEventFromSubject(epSubjectWithHyphen)).toBe(epEvent)
+    })
+
+    test('handles EP event name with a hyphen in misc positions', () => {
+      const epSubjectWithHyphen =
+        'Global MASTER-Net EP-241119a observations report'
+      expect(parseEventFromSubject(epSubjectWithHyphen)).toBe(epEvent)
+    })
+  })
+
   describe('ZTF', () => {
     test('handles ZTF event names with space', () => {
       const ztfSubject =

app/routes/circulars/circulars.lib.ts

@@ -70,6 +70,7 @@ const subjectMatchers: SubjectMatcher[] = [
     /Baksan\sNeutrino\sObservatory\sAlert[.\s_-]*(\d{6}.\d{2})/i,
     ([, id]) => `Baksan Neutrino Observatory Alert ${id}`,
   ],
+  [/EP[.\s_-]*(\d{6}[a-z])/i, ([, id]) => `EP${id}`],
 ]
 
 /** Format a Circular as plain text. */