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use itertools::Itertools; use std::collections::HashMap; use std::iter::FromIterator; #[derive(Clone)] pub struct Schema { pub definitions: Vec<SchemaDefinition> } impl Schema { pub fn new() -> Self { Self { definitions: vec![] } } pub fn add_definition(mut self, definition: SchemaDefinition) -> Self { self.definitions.push(definition); self } pub fn add_definition_ref(&mut self, definition: SchemaDefinition) { self.definitions.push(definition); } } impl ToString for Schema { fn to_string(&self) -> String { let mut representation = self.definitions.iter() .map(|def| def.to_string()) .join("\n"); representation += "\n\n"; let predicate_map: HashMap<&String, &PredicateDefinition> = HashMap::from_iter(self.definitions.iter() .map(|def| &def.predicates) .flatten() .map(|pred| (&pred.name, pred))); representation += &predicate_map.iter().map(|(name, pred)| pred.to_string()).join("\n"); representation } } #[derive(Clone)] pub struct SchemaDefinition { name: String, predicates: Vec<PredicateDefinition> } impl SchemaDefinition { pub fn new(name: &str) -> Self { Self { name: name.to_string(), predicates: vec![] } } pub fn add_predicate(mut self, predicate: PredicateDefinition) -> Self { self.predicates.push(predicate); self } pub fn add_predicate_ref(&mut self, predicate: PredicateDefinition) { self.predicates.push(predicate); } } impl ToString for SchemaDefinition { fn to_string(&self) -> String { format!( "type {type_name} {{\n\ \t{predicates}\n\ }}", type_name = &self.name, predicates = &self.predicates.iter().map(|pred| &pred.name).join("\n\t")) } } #[derive(Clone)] pub struct PredicateDefinition { name: String, predicate_type: PredicateType, indexing: Vec<Indexing>, upsert: bool } impl PredicateDefinition { pub fn new(name: &str, predicate_type: PredicateType) -> Self { Self { name: name.to_string(), predicate_type, indexing: vec![], upsert: false } } pub fn add_index(mut self, index: Indexing) -> Self { self.indexing.push(index); self } pub fn add_index_ref(&mut self, index: Indexing) { self.indexing.push(index); } pub fn upsert(mut self) -> Self { self.upsert = true; self } } impl ToString for PredicateDefinition { fn to_string(&self) -> String { let mut index = format!(""); if !self.indexing.is_empty() { index = format!( " @index({})", &self.indexing.iter().map(|pred| pred.to_string()).join(", ") ); } let upsert = if self.upsert { format!(" @upsert") } else { format!("") }; format!( "{name}: {ptype}{index}{upsert} .", name = &self.name, ptype = self.predicate_type.to_string(), index = index, upsert = upsert ) } } #[derive(Clone)] pub enum PredicateType { String, StringArray, UID, UIDArray, INT, INTArray } impl ToString for PredicateType { fn to_string(&self) -> String { match self { PredicateType::String => format!("string"), PredicateType::StringArray => format!("[string]"), PredicateType::UID => format!("uid"), PredicateType::UIDArray => format!("[uid]"), PredicateType::INT => format!("int"), PredicateType::INTArray => format!("[int]") } } } #[derive(Clone)] pub enum Indexing { TERM, TRIGRAM, INT, EXACT } impl ToString for Indexing { fn to_string(&self) -> String { match self { Indexing::TERM => format!("term"), Indexing::TRIGRAM => format!("trigram"), Indexing::INT => format!("int"), Indexing::EXACT => format!("exact") } } }