refactor builder modules (#249)

This splits the builders to their own files

biscuit-auth/src/token/builder/algorithm.rs

@@ -0,0 +1,59 @@
+use std::convert::TryFrom;
+
+use crate::error;
+
+#[derive(Debug, Copy, Clone, PartialEq, Hash, Eq)]
+pub enum Algorithm {
+    Ed25519,
+    Secp256r1,
+}
+
+impl TryFrom<&str> for Algorithm {
+    type Error = error::Format;
+    fn try_from(value: &str) -> Result<Self, Self::Error> {
+        match value {
+            "ed25519" => Ok(Algorithm::Ed25519),
+            "secp256r1" => Ok(Algorithm::Secp256r1),
+            _ => Err(error::Format::DeserializationError(format!(
+                "deserialization error: unexpected key algorithm {}",
+                value
+            ))),
+        }
+    }
+}
+
+impl From<biscuit_parser::builder::Algorithm> for Algorithm {
+    fn from(value: biscuit_parser::builder::Algorithm) -> Algorithm {
+        match value {
+            biscuit_parser::builder::Algorithm::Ed25519 => Algorithm::Ed25519,
+            biscuit_parser::builder::Algorithm::Secp256r1 => Algorithm::Secp256r1,
+        }
+    }
+}
+
+impl From<Algorithm> for biscuit_parser::builder::Algorithm {
+    fn from(value: Algorithm) -> biscuit_parser::builder::Algorithm {
+        match value {
+            Algorithm::Ed25519 => biscuit_parser::builder::Algorithm::Ed25519,
+            Algorithm::Secp256r1 => biscuit_parser::builder::Algorithm::Secp256r1,
+        }
+    }
+}
+
+impl From<crate::format::schema::public_key::Algorithm> for Algorithm {
+    fn from(value: crate::format::schema::public_key::Algorithm) -> Algorithm {
+        match value {
+            crate::format::schema::public_key::Algorithm::Ed25519 => Algorithm::Ed25519,
+            crate::format::schema::public_key::Algorithm::Secp256r1 => Algorithm::Secp256r1,
+        }
+    }
+}
+
+impl From<Algorithm> for crate::format::schema::public_key::Algorithm {
+    fn from(value: Algorithm) -> crate::format::schema::public_key::Algorithm {
+        match value {
+            Algorithm::Ed25519 => crate::format::schema::public_key::Algorithm::Ed25519,
+            Algorithm::Secp256r1 => crate::format::schema::public_key::Algorithm::Secp256r1,
+        }
+    }
+}

biscuit-auth/src/token/builder/biscuit.rs

@@ -0,0 +1,178 @@
+use super::{BlockBuilder, Check, Fact, Rule, Scope, Term};
+use crate::builder_ext::BuilderExt;
+use crate::crypto::PublicKey;
+use crate::datalog::SymbolTable;
+use crate::token::default_symbol_table;
+use crate::{error, Biscuit, KeyPair};
+use rand::{CryptoRng, RngCore};
+
+use std::fmt;
+use std::time::SystemTime;
+use std::{collections::HashMap, convert::TryInto, fmt::Write};
+
+/// creates a Biscuit
+#[derive(Clone, Default)]
+pub struct BiscuitBuilder {
+    inner: BlockBuilder,
+    root_key_id: Option<u32>,
+}
+
+impl BiscuitBuilder {
+    pub fn new() -> BiscuitBuilder {
+        BiscuitBuilder {
+            inner: BlockBuilder::new(),
+            root_key_id: None,
+        }
+    }
+
+    pub fn merge(&mut self, other: BlockBuilder) {
+        self.inner.merge(other)
+    }
+
+    pub fn add_fact<F: TryInto<Fact>>(&mut self, fact: F) -> Result<(), error::Token>
+    where
+        error::Token: From<<F as TryInto<Fact>>::Error>,
+    {
+        self.inner.add_fact(fact)
+    }
+
+    pub fn add_rule<Ru: TryInto<Rule>>(&mut self, rule: Ru) -> Result<(), error::Token>
+    where
+        error::Token: From<<Ru as TryInto<Rule>>::Error>,
+    {
+        self.inner.add_rule(rule)
+    }
+
+    pub fn add_check<C: TryInto<Check>>(&mut self, check: C) -> Result<(), error::Token>
+    where
+        error::Token: From<<C as TryInto<Check>>::Error>,
+    {
+        self.inner.add_check(check)
+    }
+
+    pub fn add_code<T: AsRef<str>>(&mut self, source: T) -> Result<(), error::Token> {
+        self.inner
+            .add_code_with_params(source, HashMap::new(), HashMap::new())
+    }
+
+    pub fn add_code_with_params<T: AsRef<str>>(
+        &mut self,
+        source: T,
+        params: HashMap<String, Term>,
+        scope_params: HashMap<String, PublicKey>,
+    ) -> Result<(), error::Token> {
+        self.inner
+            .add_code_with_params(source, params, scope_params)
+    }
+
+    pub fn add_scope(&mut self, scope: Scope) {
+        self.inner.add_scope(scope);
+    }
+
+    #[cfg(test)]
+    pub(crate) fn add_right(&mut self, resource: &str, right: &str) {
+        use crate::builder::fact;
+
+        use super::string;
+
+        let _ = self.add_fact(fact("right", &[string(resource), string(right)]));
+    }
+
+    pub fn set_context(&mut self, context: String) {
+        self.inner.set_context(context);
+    }
+
+    pub fn set_root_key_id(&mut self, root_key_id: u32) {
+        self.root_key_id = Some(root_key_id);
+    }
+
+    /// returns all of the datalog loaded in the biscuit builder
+    pub fn dump(&self) -> (Vec<Fact>, Vec<Rule>, Vec<Check>) {
+        (
+            self.inner.facts.clone(),
+            self.inner.rules.clone(),
+            self.inner.checks.clone(),
+        )
+    }
+
+    pub fn dump_code(&self) -> String {
+        let (facts, rules, checks) = self.dump();
+        let mut f = String::new();
+        for fact in facts {
+            let _ = writeln!(f, "{};", fact);
+        }
+        for rule in rules {
+            let _ = writeln!(f, "{};", rule);
+        }
+        for check in checks {
+            let _ = writeln!(f, "{};", check);
+        }
+        f
+    }
+
+    pub fn build(self, root_key: &KeyPair) -> Result<Biscuit, error::Token> {
+        self.build_with_symbols(root_key, default_symbol_table())
+    }
+
+    pub fn build_with_symbols(
+        self,
+        root_key: &KeyPair,
+        symbols: SymbolTable,
+    ) -> Result<Biscuit, error::Token> {
+        self.build_with_rng(root_key, symbols, &mut rand::rngs::OsRng)
+    }
+
+    pub fn build_with_rng<R: RngCore + CryptoRng>(
+        self,
+        root: &KeyPair,
+        symbols: SymbolTable,
+        rng: &mut R,
+    ) -> Result<Biscuit, error::Token> {
+        let authority_block = self.inner.build(symbols.clone());
+        Biscuit::new_with_rng(rng, self.root_key_id, root, symbols, authority_block)
+    }
+
+    pub fn build_with_key_pair(
+        self,
+        root: &KeyPair,
+        symbols: SymbolTable,
+        next: &KeyPair,
+    ) -> Result<Biscuit, error::Token> {
+        let authority_block = self.inner.build(symbols.clone());
+        Biscuit::new_with_key_pair(self.root_key_id, root, next, symbols, authority_block)
+    }
+}
+
+impl fmt::Display for BiscuitBuilder {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self.root_key_id {
+            None => writeln!(f, "// no root key id set")?,
+            Some(id) => writeln!(f, "// root key id: {}", id)?,
+        }
+        self.inner.fmt(f)
+    }
+}
+
+impl BuilderExt for BiscuitBuilder {
+    fn add_resource(&mut self, name: &str) {
+        self.inner.add_resource(name);
+    }
+    fn check_resource(&mut self, name: &str) {
+        self.inner.check_resource(name);
+    }
+    fn check_resource_prefix(&mut self, prefix: &str) {
+        self.inner.check_resource_prefix(prefix);
+    }
+    fn check_resource_suffix(&mut self, suffix: &str) {
+        self.inner.check_resource_suffix(suffix);
+    }
+    fn add_operation(&mut self, name: &str) {
+        self.inner.add_operation(name);
+    }
+    fn check_operation(&mut self, name: &str) {
+        self.inner.check_operation(name);
+    }
+    fn check_expiration_date(&mut self, date: SystemTime) {
+        self.inner.check_expiration_date(date);
+    }
+}