pub struct Reaction {
    reaction: String,
}
Expand description

A single reaction consisting of multiple emoji sequences.

It is guaranteed to have all emojis sorted and deduplicated inside.

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§reaction: String

Canonical representation of reaction as a string of space-separated emojis.

Implementations§

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impl Reaction

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pub fn is_empty(&self) -> bool

Returns true if reaction contains no emojis.

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pub fn emojis(&self) -> Vec<&str>

Returns a vector of emojis composing a reaction.

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pub fn as_str(&self) -> &str

Returns space-separated string of emojis

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pub fn add(&self, other: Self) -> Self

Appends emojis from another reaction to this reaction.

Trait Implementations§

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impl Clone for Reaction

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fn clone(&self) -> Reaction

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Reaction

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl Default for Reaction

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fn default() -> Reaction

Returns the “default value” for a type. Read more
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impl From<&str> for Reaction

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fn from(reaction: &str) -> Self

Parses a string containing a reaction.

Reaction string is separated by spaces or tabs (WSP in ABNF), but this function accepts any ASCII whitespace, so even a CRLF at the end of string is acceptable.

Any short enough string is accepted as a reaction to avoid the complexity of validating emoji sequences as required by RFC 9078. On the sender side UI is responsible to provide only valid emoji sequences via reaction picker. On the receiver side, abuse of the possibility to use arbitrary strings as reactions is not different from other kinds of spam attacks such as sending large numbers of large messages, and should be dealt with the same way, e.g. by blocking the user.

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