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note description: "Email Object" legal: "See notice at end of class." status: "See notice at end of class." author: "david s" revised_by: "Alexander Kogtenkov" date: "$Date: 2020-05-19 06:35:33 -0800 (Tue, 19 May 2020) $" revision: "$Revision: 104261 $" class interface EMAIL create make -- Initialize the headers table. make_with_entry (header_from, header_to: READABLE_STRING_8) -- Create an email with the 'header_from' and the 'header_to'. require needed_info: header_from /= Void and then header_to /= Void feature -- Access generating_type: TYPE [detachable EMAIL] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) ensure -- from ANY generating_type_not_void: Result /= Void generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty header (h: READABLE_STRING_8): detachable HEADER -- Retrieve the content of the header 'h' -- (from EMAIL_RESOURCE) headers: HASH_TABLE [HEADER, READABLE_STRING_8] -- All information concerning each headers -- (from EMAIL_RESOURCE) mail_message: READABLE_STRING_8 -- Email message -- (from MEMORY_RESOURCE) mail_signature: READABLE_STRING_8 -- Email signature -- (from MEMORY_RESOURCE) feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) frozen is_deep_equal alias "≡≡≡" (other: EMAIL): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) is_equal (other: EMAIL): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) frozen standard_is_equal alias "" (other: EMAIL): BOOLEAN -- Is other attached to an object of the same type -- as current object, and field-by-field identical to it? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) feature -- Status report conforms_to (other: ANY): BOOLEAN -- Does type of current object conform to type -- of other (as per Eiffel: The Language, chapter 13)? -- (from ANY) require -- from ANY other_not_void: other /= Void error: BOOLEAN -- Is there an error? -- (from EMAIL_RESOURCE) has_header_entry (header_key: STRING_8): BOOLEAN is_header_valid: BOOLEAN -- Is the email resource's header valid? -- (from EMAIL_RESOURCE) is_initiated: BOOLEAN -- Has the connection has been initiated? -- (from EMAIL_RESOURCE) same_type (other: ANY): BOOLEAN -- Is type of current object identical to type of other? -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) Transfer_error: TRANSFER_ERROR -- Transfer error handling -- (from EMAIL_RESOURCE) feature -- Status setting disable_initiated -- Unset is_initiated. -- (from EMAIL_RESOURCE) disable_transfer_error -- Disable transfer error. -- (from EMAIL_RESOURCE) enable_initiated -- Set is_initiated. -- (from EMAIL_RESOURCE) enable_transfer_error -- Enable transfer error. -- (from EMAIL_RESOURCE) set_transfer_error_message (s: STRING_8) -- Set transfer error message to 's'. -- (from EMAIL_RESOURCE) feature -- Duplication copy (other: EMAIL) -- Update current object using fields of object attached -- to other, so as to yield equal objects. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_equal: Current ~ other frozen deep_copy (other: EMAIL) -- Effect equivalent to that of: -- `copy` (other . `deep_twin`) -- (from ANY) require -- from ANY other_not_void: other /= Void ensure -- from ANY deep_equal: deep_equal (Current, other) frozen deep_twin: EMAIL -- New object structure recursively duplicated from Current. -- (from ANY) ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) frozen standard_copy (other: EMAIL) -- Copy every field of other onto corresponding field -- of current object. -- (from ANY) require -- from ANY other_not_void: other /= Void type_identity: same_type (other) ensure -- from ANY is_standard_equal: standard_is_equal (other) frozen standard_twin: EMAIL -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) frozen twin: EMAIL -- New object equal to Current -- `twin` calls `copy`; to change copying/twinning semantics, redefine `copy`. -- (from ANY) ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current feature -- Basic operations frozen default: detachable EMAIL -- Default value of object's type -- (from ANY) frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.`default` for -- some p of type POINTER.) -- (from ANY) ensure -- from ANY instance_free: class default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) frozen do_nothing -- Execute a null action. -- (from ANY) ensure -- from ANY instance_free: class receive -- Receive email. send -- Send email. feature -- Basic operations. transfer (resource: PROTOCOL_RESOURCE) -- Used when the mailer will receive an email from 'resource'. require -- from EMAIL_RESOURCE resource_exists: resource /= Void is_valid_transfer: (resource.Can_be_sent and Can_send) or (resource.can_receive and Can_be_received) connection_is_initiated: (can_be_sent and resource.is_initiated) or (is_initiated and resource.Can_be_received) feature -- Constants for SMTP Protocol Ack_begin_connection: INTEGER_32 = 220 -- (from EMAIL_CONSTANTS) Ack_end_connection: INTEGER_32 = 221 -- (from EMAIL_CONSTANTS) Data: STRING_8 = "DATA" -- (from EMAIL_CONSTANTS) Data_code: INTEGER_32 = 354 -- (from EMAIL_CONSTANTS) Ehlo: STRING_8 = "EHLO " -- (from EMAIL_CONSTANTS) Helo: STRING_8 = "HELO " -- (from EMAIL_CONSTANTS) Mail_bcc: STRING_8 = "RCPT BCC:" -- (from EMAIL_CONSTANTS) Mail_cc: STRING_8 = "RCPT CC:" -- (from EMAIL_CONSTANTS) Mail_from: STRING_8 = "MAIL FROM: " -- (from EMAIL_CONSTANTS) Mail_reply_to: STRING_8 = "RCPT REPLY TO:" -- (from EMAIL_CONSTANTS) Mail_to: STRING_8 = "RCPT TO: " -- (from EMAIL_CONSTANTS) No_valid_recipient: INTEGER_32 = 554 -- (from EMAIL_CONSTANTS) Ok: INTEGER_32 = 250 -- (from EMAIL_CONSTANTS) Quit: STRING_8 = "QUIT" -- (from EMAIL_CONSTANTS) Remote_error: INTEGER_32 = 550 -- (from EMAIL_CONSTANTS) Size_error: INTEGER_32 = 500 -- (from EMAIL_CONSTANTS) Struct_error: INTEGER_32 = 552 -- (from EMAIL_CONSTANTS) feature -- Constants for email headers (Authorized keys for the Hashtables) H_bcc: STRING_8 = "Bcc" -- (from EMAIL_CONSTANTS) H_cc: STRING_8 = "Cc" -- (from EMAIL_CONSTANTS) H_date: STRING_8 = "Date" -- (from EMAIL_CONSTANTS) H_from: STRING_8 = "From" -- (from EMAIL_CONSTANTS) H_reply_to: STRING_8 = "Reply-to" -- (from EMAIL_CONSTANTS) H_subject: STRING_8 = "Subject" -- (from EMAIL_CONSTANTS) H_to: STRING_8 = "To" -- (from EMAIL_CONSTANTS) feature -- Entries changes add_header_entries (header_key: STRING_8; header_entries: ITERABLE [READABLE_STRING_8]) -- Add multiple 'header_entries' at once  to 'header_key', -- If not such header exists. create it. add_header_entry (header_key, header_entry: READABLE_STRING_8) -- Add 'header_entry' to header 'header_key', -- If no such header exists, create it. require not_void: header_entry /= Void and then header_key /= Void remove_header_entries (header_key: STRING_8) -- Remove all header entries from header 'header_key' if present. ensure wiped_out: attached headers.item (header_key) as l_header implies l_header.entries.is_empty remove_header_entry (header_key, header_entry: STRING_8) -- Remove 'header_entry' from header 'header_key' if present. ensure header_entry_no_longer_exists: attached headers.item (header_key) as l_header_after implies not l_header_after.entries.has (header_entry) feature -- Implementation (EMAIL_RESOURCE) Can_be_received: BOOLEAN = True -- Can an email received? can_be_sent: BOOLEAN -- Can an email be send? Can_receive: BOOLEAN = False -- Can memory resource receive? -- (from MEMORY_RESOURCE) Can_send: BOOLEAN = False -- Can memory resource send? -- (from MEMORY_RESOURCE) splitted_recipients_from (a_recipient_value: READABLE_STRING_8): ARRAYED_LIST [READABLE_STRING_8] -- List of individual recipients from a_recipient_value. -- Mainly to support input with multiple recipient addresses. feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) ensure -- from ANY instance_free: class io_not_void: Result /= Void out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY out_not_void: Result /= Void print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) ensure -- from ANY instance_free: class frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) ensure -- from ANY tagged_out_not_void: Result /= Void feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void feature -- Recipient change add_recipient_address (a_recipient: READABLE_STRING_8) -- Added a_recipient address to "To:" entries. add_recipient_address_in_bcc (a_recipient: READABLE_STRING_8) -- Added a_recipient address to "BCc:" entries. add_recipient_address_in_cc (a_recipient: READABLE_STRING_8) -- Added a_recipient address to "Cc:" entries. feature -- Sender change add_sender_address (a_sender: READABLE_STRING_8) -- Added a_sender address to "From:" entries. feature -- Settings set_message (s: READABLE_STRING_8) -- Set mail_message to 's'. -- (from MEMORY_RESOURCE) set_signature (s: READABLE_STRING_8) -- Set mail_signature to 's'. -- (from MEMORY_RESOURCE) invariant -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2020, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., Goleta, CA 93117 USA Telephone 805-685-1006, Fax 805-685-6869 Website http://www.eiffel.com Customer support http://support.eiffel.com ]" end -- class EMAIL
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