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expression.py
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443 lines (300 loc) · 9.58 KB
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"""Type definitions for expressions."""
from dataclasses import dataclass
from datetime import date, datetime, time
from enum import Enum, auto
from typing import List, Union
@dataclass
class ActiveBooleanExpression:
"""Expression evaluating whether a given entity is active."""
reference: str
class AggregateOperator(Enum):
"""Operator to use when aggregating numeric expression results across entities."""
AVG = auto()
COUNT = auto()
MAX = auto()
MIN = auto()
SUM = auto()
@dataclass
class AllBooleanExpression:
"""Expression evaluating whether all given sub-expressions hold."""
exprs: List["BooleanExpression"]
@dataclass
class AnyBooleanExpression:
"""Expression evaluating whether any given sub-expression hold."""
exprs: List["BooleanExpression"]
@dataclass
class AssignedBooleanExpression:
"""Expression evaluating whether a given attribute is assigned for a given entity."""
attribute_type: str
reference: str
@dataclass
class AttributeBooleanExpression:
"""Expression evaluating an attribute assignment for a given boolean attribute and entity."""
attribute_type: str
reference: str
@dataclass
class AttributeDateExpression:
"""Expression evaluating an attribute assignment for a given date attribute and entity."""
attribute_type: str
reference: str
@dataclass
class AttributeDateTimeExpression:
"""Expression evaluating an attribute assignment for a given date-time attribute and entity."""
attribute_type: str
reference: str
@dataclass
class AttributeNumberExpression:
"""Expression evaluating an attribute assignment for a given number attribute and entity."""
attribute_type: str
reference: str
@dataclass
class AttributeStringExpression:
"""Expression evaluating an attribute assignment for a given string attribute and entity."""
attribute_type: str
reference: str
@dataclass
class AttributeTimeExpression:
"""Expression evaluating an attribute assignment for a given time attribute and entity."""
attribute_type: str
reference: str
class CmpOperator(Enum):
"""Operator for binary comparisons."""
EQ = auto()
GT = auto()
GTE = auto()
LT = auto()
LTE = auto()
NEQ = auto()
@dataclass
class DateCmpBooleanExpression:
"""Expression evaluating to a comparison between results of two date expressions."""
lhs: "DateExpression"
operator: CmpOperator
rhs: "DateExpression"
@dataclass
class DateTimeCmpBooleanExpression:
"""Expression evaluating to a comparison between results of two date-time expressions."""
lhs: "DateTimeExpression"
operator: CmpOperator
rhs: "DateTimeExpression"
@dataclass
class DirectlyLinkedToBooleanExpression:
"""Expression evaluating whether a given entity is directly linked to some other entity matching a condition."""
alias: str
condition: "BooleanExpression"
entity_type: str
link_alias: str
source_id: int
@dataclass
class DirectLinkAggregateNumberExpression:
"""Expression evaluating a given aggregate across a given entity's direct links."""
alias: str
condition: "BooleanExpression"
entity_type: str
expr: "NumberExpression"
link_alias: str
op: AggregateOperator
source_id: int
@dataclass
class ExistsBooleanExpression:
"""Expression evaluating whether a given condition holds for some entity of a given type."""
alias: str
condition: "BooleanExpression"
entity_type: str
source_id: int
@dataclass
class IdInBooleanExpression:
"""Expression evaluating whether an entity's identifier occurs in a given list."""
ids: List[str]
reference: str
@dataclass
class IdStringExpression:
"""Expression evaluating to a given entity's identifier."""
reference: str
@dataclass
class LinkedToBooleanExpression:
"""Expression evaluating whether a given entity is linked to some other entity matching a given condition."""
alias: str
condition: "BooleanExpression"
entity_type: str
source_id: int
@dataclass
class LinkAggregateNumberExpression:
"""Expression evaluating a given aggregate across a given entity's links."""
alias: str
condition: "BooleanExpression"
entity_type: str
expr: "NumberExpression"
op: AggregateOperator
source_id: int
@dataclass
class LinkAssignedBooleanExpression:
"""Expression evaluating whether a given relationship attribute is assigned for a given link."""
link_attribute_type: str
link_reference: str
@dataclass
class LinkAttributeBooleanExpression:
"""Expression evaluating an attribute assignment for a given boolean attribute and link."""
link_attribute_type: str
link_reference: str
@dataclass
class LinkAttributeDateExpression:
"""Expression evaluating an attribute assignment for a given date attribute and link."""
link_attribute_type: str
link_reference: str
@dataclass
class LinkAttributeDateTimeExpression:
"""Expression evaluating an attribute assignment for a given date-time attribute and link."""
link_attribute_type: str
link_reference: str
@dataclass
class LinkAttributeNumberExpression:
"""Expression evaluating an attribute assignment for a given number attribute and link."""
link_attribute_type: str
link_reference: str
@dataclass
class LinkAttributeStringExpression:
"""Expression evaluating an attribute assignment for a given string attribute and link."""
link_attribute_type: str
link_reference: str
@dataclass
class LinkAttributeTimeExpression:
"""Expression evaluating an attribute assignment for a given time attribute and link."""
link_attribute_type: str
link_reference: str
@dataclass
class LiteralBooleanExpression:
"""Expression evaluating to a given boolean literal."""
boolean: bool
@dataclass
class LiteralDateExpression:
"""Expression evaluating to a given date literal."""
date: date
@dataclass
class LiteralDateTimeExpression:
"""Expression evaluating to a given date-time literal."""
date_time: datetime
@dataclass
class LiteralNumberExpression:
"""Expression evaluating to a given number literal."""
number: float
@dataclass
class LiteralStringExpression:
"""Expression evaluating to a given string literal."""
string: str
@dataclass
class LiteralTimeExpression:
"""Expression evaluating to a given time literal."""
time: time
@dataclass
class MatchBooleanExpression:
"""Expression evaluating to a match between results of two given string expressions."""
lhs: "StringExpression"
mode: "MatchMode"
operator: "MatchOperator"
rhs: "StringExpression"
class MatchMode(Enum):
"""Case-sensitivity mode for matching two strings."""
CASE_INSENSITIVE = auto()
CASE_SENSITIVE = auto()
class MatchOperator(Enum):
"""Operator for matching two strings."""
CONTAINS = auto()
ENDS_WITH = auto()
EQUALS = auto()
SPLIT_INTERSECTS = auto()
STARTS_WITH = auto()
@dataclass
class MatchesPatternBooleanExpression:
"""Expression matching the result of a given expression to a given pattern."""
expr: "StringExpression"
pattern: str
@dataclass
class NameStringExpression:
"""Expression evaluating to a given entity's name."""
reference: str
@dataclass
class NotBooleanExpression:
"""Expression evaluating to the boolean negation of a given expression's result."""
expr: "BooleanExpression"
@dataclass
class NumberCmpBooleanExpression:
"""Expression evaluating to a comparison between results of two number expressions."""
lhs: "NumberExpression"
operator: CmpOperator
rhs: "NumberExpression"
NumberExpression = Union[
AttributeNumberExpression,
DirectLinkAggregateNumberExpression,
LinkAggregateNumberExpression,
LinkAttributeNumberExpression,
LiteralNumberExpression,
]
@dataclass
class RelativeDateExpression:
"""Expression representing a date offset from a current timestamp."""
days: int
future: bool
months: int
years: int
DateExpression = Union[
AttributeDateExpression,
LinkAttributeDateExpression,
LiteralDateExpression,
RelativeDateExpression,
]
@dataclass
class RelativeDateTimeExpression:
"""Expression representing a date-time offset from a current timestamp."""
days: int
hours: int
future: bool
minutes: int
months: int
seconds: int
years: int
DateTimeExpression = Union[
AttributeDateTimeExpression,
LinkAttributeDateTimeExpression,
LiteralDateTimeExpression,
RelativeDateTimeExpression,
]
StringExpression = Union[
AttributeStringExpression,
IdStringExpression,
LinkAttributeStringExpression,
LiteralStringExpression,
NameStringExpression,
]
@dataclass
class TimeCmpBooleanExpression:
"""Expression evaluating to a comparison between results of two time expressions."""
lhs: "TimeExpression"
operator: CmpOperator
rhs: "TimeExpression"
BooleanExpression = Union[
ActiveBooleanExpression,
AllBooleanExpression,
AnyBooleanExpression,
AssignedBooleanExpression,
AttributeBooleanExpression,
DateCmpBooleanExpression,
DateTimeCmpBooleanExpression,
DirectlyLinkedToBooleanExpression,
ExistsBooleanExpression,
IdInBooleanExpression,
LinkAssignedBooleanExpression,
LinkAttributeBooleanExpression,
LinkedToBooleanExpression,
LiteralBooleanExpression,
MatchBooleanExpression,
MatchesPatternBooleanExpression,
NotBooleanExpression,
NumberCmpBooleanExpression,
TimeCmpBooleanExpression,
]
TimeExpression = Union[
AttributeTimeExpression,
LinkAttributeTimeExpression,
LiteralTimeExpression,
]