Content class abstract interface

Interface for message content (body) that contains the actual message data.

Represents the core payload of a message, including type identifier, metadata, and message-specific data (text, commands, etc.). Implements Mapper for serialization to/from structured formats (Map/JSON).

Serialized format (Map/JSON):

{
  "type": "0",             // Message type (e.g., i2s(0) = "0" = "text")
  "sn": 0,                 // Unique serial number (serves as message ID)

  "time": 123.45,          // Message timestamp (Unix timestamp in seconds)
  "group": "group@zzz",    // Optional group ID (marks this as a group message)

  //-- message info
  "text": "Hello World!",  // Text content (for text messages)
  "command": "handshake"   // Command name (for system command messages)
  //...
}

Implemented types

• Map<String, dynamic>

Properties

entries → Iterable<MapEntry<String, dynamic>>

The map entries of this Map.

no setter, inherited

group ↔ ID?

Group identifier for group messages.

getter/setter pair

hashCode → int

The hash code for this object.

no setter, inherited

isEmpty → bool

Whether there is no key/value pair in the map.

no setter, inherited

isNotEmpty → bool

Whether there is at least one key/value pair in the map.

no setter, inherited

keys → Iterable<String>

The keys of this Map.

no setter, inherited

length → int

The number of key/value pairs in the map.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

sn → int

Serial number (unique message identifier).

no setter

time → DateTime?

Timestamp when the content was created.

no setter

type → String

Message type identifier.

no setter

values → Iterable

The values of this Map.

no setter, inherited

Methods

addAll(Map<String, dynamic> other) → void

Adds all key/value pairs of other to this map.

inherited

addEntries(Iterable<MapEntry<String, dynamic>> newEntries) → void

Adds all key/value pairs of newEntries to this map.

inherited

cast<RK, RV>() → Map<RK, RV>

Provides a view of this map as having RK keys and RV instances, if necessary.

inherited

clear() → void

Removes all entries from the map.

inherited

containsKey(Object? key) → bool

Whether this map contains the given key.

inherited

containsValue(Object? value) → bool

Whether this map contains the given value.

inherited

copyMap([bool deepCopy = false]) → Map

Creates a copy of the internal map.

inherited

forEach(void action(String key, dynamic value)) → void

Applies action to each key/value pair of the map.

inherited

getBool(String key, [bool? defaultValue]) → bool?

inherited

getDateTime(String key, [DateTime? defaultValue]) → DateTime?

inherited

getDouble(String key, [double? defaultValue]) → double?

inherited

getInt(String key, [int? defaultValue]) → int?

inherited

getString(String key, [String? defaultValue]) → String?

Gets a string value for the given key.

inherited

map<K2, V2>(MapEntry<K2, V2> convert(String key, dynamic value)) → Map<K2, V2>

Returns a new map where all entries of this map are transformed by the given convert function.

inherited

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

putIfAbsent(String key, dynamic ifAbsent()) → dynamic

Look up the value of key, or add a new entry if it isn't there.

inherited

remove(Object? key) → dynamic

Removes key and its associated value, if present, from the map.

inherited

removeWhere(bool test(String key, dynamic value)) → void

Removes all entries of this map that satisfy the given test.

inherited

setDateTime(String key, DateTime? time) → void

inherited

setMap(String key, Mapper? mapper) → void

inherited

setString(String key, Stringer? stringer) → void

inherited

toMap() → Map

Returns the internal map as a Map.

inherited

toString() → String

A string representation of this object.

inherited

update(String key, dynamic update(dynamic value), {dynamic ifAbsent()?}) → dynamic

Updates the value for the provided key.

inherited

updateAll(dynamic update(String key, dynamic value)) → void

Updates all values.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

operator [](Object? key) → dynamic

The value for the given key, or null if key is not in the map.

inherited

operator []=(String key, dynamic value) → void

Associates the key with the given value.

inherited

Static Methods

convert(Iterable array) → List<Content>

getFactory(String msgType) → ContentFactory?

parse(Object? content) → Content?

revert(Iterable<Content> contents) → List<Map>

setFactory(String msgType, ContentFactory factory) → void