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use std::borrow::Cow;
use std::cmp::Ordering;
use crate::api::schema::{
AgentViewBuiltinField, AgentViewBuiltinSortField, AgentViewField, AgentViewFilter,
AgentViewSort, AgentViewSortField, AgentViewSortOrder, AgentViewValue,
};
pub(crate) struct AgentViewContext {
pub(crate) scope: usize,
pub(crate) workspace_id: Option<String>,
pub(crate) tab_id: Option<String>,
}
pub(crate) trait AgentViewEntry {
fn scope(&self) -> usize;
fn status(&self) -> &'static str;
fn workspace_id(&self) -> Option<Cow<'_, str>>;
fn tab_id(&self) -> Option<Cow<'_, str>>;
fn pane_id(&self) -> Option<Cow<'_, str>>;
fn agent(&self) -> Option<&str>;
fn seen(&self) -> bool;
fn state_change_seq(&self) -> Option<u64>;
fn token(&self, token: &str) -> Option<&str>;
fn workspace_order(&self) -> Option<u64>;
fn tab_order(&self) -> Option<u64>;
fn pane_order(&self) -> Option<u64>;
fn attention(&self) -> u64;
}
#[derive(Debug, PartialEq, Eq, PartialOrd, Ord)]
enum EvalValue<'a> {
String(Cow<'a, str>),
ScopedId { scope: usize, value: Cow<'a, str> },
Bool(bool),
Number(u64),
}
pub(crate) fn matches_filter<E: AgentViewEntry + ?Sized>(
context: &AgentViewContext,
entry: &E,
filter: &AgentViewFilter,
) -> bool {
match filter {
AgentViewFilter::All { filters } => filters
.iter()
.all(|filter| matches_filter(context, entry, filter)),
AgentViewFilter::Any { filters } => filters
.iter()
.any(|filter| matches_filter(context, entry, filter)),
AgentViewFilter::Not { filter } => !matches_filter(context, entry, filter),
AgentViewFilter::Eq { field, value } => {
field_value(entry, field) == operand_value(context, field, value)
}
AgentViewFilter::In { field, values } => {
let actual = field_value(entry, field);
values
.iter()
.any(|value| actual == operand_value(context, field, value))
}
AgentViewFilter::Exists { field } => field_value(entry, field).is_some(),
}
}
pub(crate) fn compare_entries<E: AgentViewEntry + ?Sized>(
left: &E,
right: &E,
sorts: &[AgentViewSort],
) -> Ordering {
for sort in sorts {
let ordering = compare_optional_values(
sort_value(left, &sort.field),
sort_value(right, &sort.field),
sort.order,
);
if ordering != Ordering::Equal {
return ordering;
}
}
Ordering::Equal
}
fn field_value<'a, E: AgentViewEntry + ?Sized>(
entry: &'a E,
field: &AgentViewField,
) -> Option<EvalValue<'a>> {
match field {
AgentViewField::Builtin(AgentViewBuiltinField::Status) => {
Some(EvalValue::String(Cow::Borrowed(entry.status())))
}
AgentViewField::Builtin(AgentViewBuiltinField::WorkspaceId) => {
entry.workspace_id().map(|value| EvalValue::ScopedId {
scope: entry.scope(),
value,
})
}
AgentViewField::Builtin(AgentViewBuiltinField::TabId) => {
entry.tab_id().map(|value| EvalValue::ScopedId {
scope: entry.scope(),
value,
})
}
AgentViewField::Builtin(AgentViewBuiltinField::PaneId) => {
entry.pane_id().map(|value| EvalValue::ScopedId {
scope: entry.scope(),
value,
})
}
AgentViewField::Builtin(AgentViewBuiltinField::Agent) => entry
.agent()
.map(|value| EvalValue::String(Cow::Borrowed(value))),
AgentViewField::Builtin(AgentViewBuiltinField::Seen) => Some(EvalValue::Bool(entry.seen())),
AgentViewField::Builtin(AgentViewBuiltinField::StateChangeSeq) => {
entry.state_change_seq().map(EvalValue::Number)
}
AgentViewField::Token { token } => entry
.token(token)
.map(|value| EvalValue::String(Cow::Borrowed(value))),
}
}
fn operand_value<'a>(
context: &'a AgentViewContext,
field: &AgentViewField,
value: &'a AgentViewValue,
) -> Option<EvalValue<'a>> {
match value {
AgentViewValue::String(value) if is_id_field(field) => Some(EvalValue::ScopedId {
scope: context.scope,
value: Cow::Borrowed(value),
}),
AgentViewValue::String(value) => Some(EvalValue::String(Cow::Borrowed(value))),
AgentViewValue::Bool(value) => Some(EvalValue::Bool(*value)),
AgentViewValue::Number(value) => Some(EvalValue::Number(*value)),
AgentViewValue::Context {
context: view_context,
} => match view_context {
crate::api::schema::AgentViewContext::CurrentWorkspaceId => context
.workspace_id
.as_deref()
.map(|value| EvalValue::ScopedId {
scope: context.scope,
value: Cow::Borrowed(value),
}),
crate::api::schema::AgentViewContext::CurrentTabId => {
context.tab_id.as_deref().map(|value| EvalValue::ScopedId {
scope: context.scope,
value: Cow::Borrowed(value),
})
}
},
}
}
fn is_id_field(field: &AgentViewField) -> bool {
matches!(
field,
AgentViewField::Builtin(
AgentViewBuiltinField::WorkspaceId
| AgentViewBuiltinField::TabId
| AgentViewBuiltinField::PaneId
)
)
}
fn sort_value<'a, E: AgentViewEntry + ?Sized>(
entry: &'a E,
field: &AgentViewSortField,
) -> Option<EvalValue<'a>> {
match field {
AgentViewSortField::Token { token } => entry
.token(token)
.map(|value| EvalValue::String(Cow::Borrowed(value))),
AgentViewSortField::Builtin(field) => match field {
AgentViewBuiltinSortField::WorkspaceOrder => {
entry.workspace_order().map(EvalValue::Number)
}
AgentViewBuiltinSortField::TabOrder => entry.tab_order().map(EvalValue::Number),
AgentViewBuiltinSortField::PaneOrder => entry.pane_order().map(EvalValue::Number),
AgentViewBuiltinSortField::Attention => Some(EvalValue::Number(entry.attention())),
AgentViewBuiltinSortField::Status => {
Some(EvalValue::String(Cow::Borrowed(entry.status())))
}
AgentViewBuiltinSortField::Agent => entry
.agent()
.map(|value| EvalValue::String(Cow::Borrowed(value))),
AgentViewBuiltinSortField::Seen => Some(EvalValue::Bool(entry.seen())),
AgentViewBuiltinSortField::StateChangeSeq => {
entry.state_change_seq().map(EvalValue::Number)
}
},
}
}
fn compare_optional_values(
left: Option<EvalValue<'_>>,
right: Option<EvalValue<'_>>,
order: AgentViewSortOrder,
) -> Ordering {
match (left, right) {
(Some(left), Some(right)) => {
let ordering = left.cmp(&right);
if matches!(order, AgentViewSortOrder::Desc) {
ordering.reverse()
} else {
ordering
}
}
(Some(_), None) => Ordering::Less,
(None, Some(_)) => Ordering::Greater,
(None, None) => Ordering::Equal,
}
}
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