mithril_build_script/

fake_aggregator.rs

use std::collections::BTreeMap;
use std::collections::BTreeSet;
use std::fmt::Write as _;
use std::fs;
use std::fs::File;
use std::path::Path;

use serde_json;

pub type ArtifactId = String;
pub type FileContent = String;

/// In memory representation of a folder containing data imported using the `scripts/import.sh` script
/// of the fake aggregator.
#[derive(Debug, Default)]
pub struct FakeAggregatorData {
    epoch_settings: FileContent,

    certificates_list: FileContent,
    individual_certificates: BTreeMap<ArtifactId, FileContent>,

    snapshots_list: FileContent,
    individual_snapshots: BTreeMap<ArtifactId, FileContent>,

    mithril_stake_distributions_list: FileContent,
    individual_mithril_stake_distributions: BTreeMap<ArtifactId, FileContent>,

    cardano_transaction_snapshots_list: FileContent,
    individual_cardano_transaction_snapshots: BTreeMap<ArtifactId, FileContent>,
    cardano_transaction_proofs: BTreeMap<ArtifactId, FileContent>,

    cardano_stake_distributions_list: FileContent,
    individual_cardano_stake_distributions: BTreeMap<ArtifactId, FileContent>,

    cardano_database_snapshots_list: FileContent,
    individual_cardano_database_snapshots: BTreeMap<ArtifactId, FileContent>,
}

impl FakeAggregatorData {
    pub fn load_from_folder(folder: &Path) -> Self {
        let mut data = FakeAggregatorData::default();

        for entry in list_json_files_in_folder(folder) {
            let filename = entry.file_name().to_string_lossy().to_string();
            let file_content = fs::read_to_string(entry.path()).unwrap_or_else(|_| {
                panic!(
                    "Could not read file content, file_path: {}",
                    entry.path().display()
                )
            });

            match filename.as_str() {
                "epoch-settings.json" => {
                    data.epoch_settings = file_content;
                }
                "mithril-stake-distributions-list.json" => {
                    data.mithril_stake_distributions_list = file_content;
                }
                "snapshots-list.json" => {
                    data.snapshots_list = file_content;
                }
                "cardano-stake-distributions-list.json" => {
                    data.cardano_stake_distributions_list = file_content;
                }
                "cardano-databases-list.json" => {
                    data.cardano_database_snapshots_list = file_content;
                }
                "certificates-list.json" => {
                    data.certificates_list = file_content;
                }
                "ctx-snapshots-list.json" => {
                    data.cardano_transaction_snapshots_list = file_content;
                }
                "mithril-stake-distributions.json" => {
                    data.individual_mithril_stake_distributions =
                        Self::read_artifacts_json_file(&entry.path());
                }
                "snapshots.json" => {
                    data.individual_snapshots = Self::read_artifacts_json_file(&entry.path());
                }
                "cardano-stake-distributions.json" => {
                    data.individual_cardano_stake_distributions =
                        Self::read_artifacts_json_file(&entry.path());
                }
                "cardano-databases.json" => {
                    data.individual_cardano_database_snapshots =
                        Self::read_artifacts_json_file(&entry.path());
                }
                "certificates.json" => {
                    data.individual_certificates = Self::read_artifacts_json_file(&entry.path());
                }
                "ctx-snapshots.json" => {
                    data.individual_cardano_transaction_snapshots =
                        Self::read_artifacts_json_file(&entry.path());
                }
                "ctx-proofs.json" => {
                    data.cardano_transaction_proofs = Self::read_artifacts_json_file(&entry.path());
                }
                // unknown file
                _ => {}
            }
        }

        data
    }

    pub fn generate_code_for_ids(self) -> String {
        Self::assemble_code(
            &[
                generate_ids_array(
                    "snapshot_digests",
                    BTreeSet::from_iter(self.individual_snapshots.keys().cloned()),
                ),
                generate_ids_array(
                    "mithril_stake_distribution_hashes",
                    BTreeSet::from_iter(
                        self.individual_mithril_stake_distributions.keys().cloned(),
                    ),
                ),
                generate_ids_array(
                    "cardano_stake_distribution_hashes",
                    BTreeSet::from_iter(
                        self.individual_cardano_stake_distributions.keys().cloned(),
                    ),
                ),
                generate_ids_array(
                    "cardano_stake_distribution_epochs",
                    BTreeSet::from_iter(extract_cardano_stake_distribution_epochs(
                        &self.individual_cardano_stake_distributions,
                    )),
                ),
                generate_ids_array(
                    "cardano_database_snapshot_hashes",
                    BTreeSet::from_iter(self.individual_cardano_database_snapshots.keys().cloned()),
                ),
                generate_ids_array(
                    "certificate_hashes",
                    BTreeSet::from_iter(self.individual_certificates.keys().cloned()),
                ),
                generate_ids_array(
                    "cardano_transaction_snapshot_hashes",
                    BTreeSet::from_iter(
                        self.individual_cardano_transaction_snapshots
                            .keys()
                            .cloned(),
                    ),
                ),
                generate_ids_array(
                    "proof_transaction_hashes",
                    BTreeSet::from_iter(self.cardano_transaction_proofs.keys().cloned()),
                ),
            ],
            false,
        )
    }

    pub fn generate_code_for_all_data(self) -> String {
        Self::assemble_code(
            &[
                generate_list_getter("epoch_settings", self.epoch_settings),
                generate_ids_array(
                    "snapshot_digests",
                    BTreeSet::from_iter(self.individual_snapshots.keys().cloned()),
                ),
                generate_artifact_getter("snapshots", self.individual_snapshots),
                generate_list_getter("snapshot_list", self.snapshots_list),
                generate_ids_array(
                    "mithril_stake_distribution_hashes",
                    BTreeSet::from_iter(
                        self.individual_mithril_stake_distributions.keys().cloned(),
                    ),
                ),
                generate_artifact_getter(
                    "mithril_stake_distributions",
                    self.individual_mithril_stake_distributions,
                ),
                generate_list_getter(
                    "mithril_stake_distribution_list",
                    self.mithril_stake_distributions_list,
                ),
                generate_ids_array(
                    "cardano_stake_distribution_hashes",
                    BTreeSet::from_iter(
                        self.individual_cardano_stake_distributions.keys().cloned(),
                    ),
                ),
                generate_ids_array(
                    "cardano_stake_distribution_epochs",
                    BTreeSet::from_iter(extract_cardano_stake_distribution_epochs(
                        &self.individual_cardano_stake_distributions,
                    )),
                ),
                generate_artifact_getter(
                    "cardano_stake_distributions",
                    self.individual_cardano_stake_distributions,
                ),
                generate_list_getter(
                    "cardano_stake_distribution_list",
                    self.cardano_stake_distributions_list,
                ),
                generate_ids_array(
                    "certificate_hashes",
                    BTreeSet::from_iter(self.individual_certificates.keys().cloned()),
                ),
                generate_ids_array(
                    "cardano_database_snapshot_hashes",
                    BTreeSet::from_iter(self.individual_cardano_database_snapshots.keys().cloned()),
                ),
                generate_artifact_getter(
                    "cardano_database_snapshots",
                    self.individual_cardano_database_snapshots,
                ),
                generate_list_getter(
                    "cardano_database_snapshot_list",
                    self.cardano_database_snapshots_list,
                ),
                generate_artifact_getter("certificates", self.individual_certificates),
                generate_list_getter("certificate_list", self.certificates_list),
                generate_ids_array(
                    "cardano_transaction_snapshot_hashes",
                    BTreeSet::from_iter(
                        self.individual_cardano_transaction_snapshots
                            .keys()
                            .cloned(),
                    ),
                ),
                generate_artifact_getter(
                    "cardano_transaction_snapshots",
                    self.individual_cardano_transaction_snapshots,
                ),
                generate_list_getter(
                    "cardano_transaction_snapshots_list",
                    self.cardano_transaction_snapshots_list,
                ),
                generate_ids_array(
                    "proof_transaction_hashes",
                    BTreeSet::from_iter(self.cardano_transaction_proofs.keys().cloned()),
                ),
                generate_artifact_getter(
                    "cardano_transaction_proofs",
                    self.cardano_transaction_proofs,
                ),
            ],
            true,
        )
    }

    fn assemble_code(functions_code: &[String], include_use_btree_map: bool) -> String {
        format!(
            "{}{}
",
            if include_use_btree_map {
                "use std::collections::BTreeMap;

"
            } else {
                ""
            },
            functions_code.join(
                "

"
            )
        )
    }

    fn read_artifacts_json_file(json_file: &Path) -> BTreeMap<ArtifactId, FileContent> {
        let file = File::open(json_file).unwrap();
        let parsed_json: serde_json::Value = serde_json::from_reader(&file).unwrap();

        let json_object = parsed_json.as_object().unwrap();
        let res: Result<Vec<_>, _> = json_object
            .iter()
            .map(|(key, value)| extract_artifact_id_and_content(key, value))
            .collect();

        BTreeMap::from_iter(res.unwrap())
    }
}

pub fn extract_cardano_stake_distribution_epochs(
    individual_csds: &BTreeMap<ArtifactId, FileContent>,
) -> Vec<String> {
    individual_csds
        .values()
        .map(|content| {
            let json_value: serde_json::Value =
                serde_json::from_str(content).unwrap_or_else(|err| {
                    panic!(
                        "Failed to parse JSON in csd content: {}\nError: {}",
                        content, err
                    );
                });

            json_value
                .get("epoch")
                .and_then(|epoch| epoch.as_u64().map(|s| s.to_string()))
                .unwrap_or_else(|| {
                    panic!("Epoch not found or invalid in csd content: {}", content);
                })
        })
        .collect()
}

fn extract_artifact_id_and_content(
    key: &String,
    value: &serde_json::Value,
) -> Result<(ArtifactId, FileContent), String> {
    let json_content = serde_json::to_string_pretty(value).map_err(|e| e.to_string())?;
    Ok((key.to_owned(), json_content))
}

pub fn list_json_files_in_folder(folder: &Path) -> impl Iterator<Item = fs::DirEntry> + '_ {
    crate::list_files_in_folder(folder)
        .filter(|e| e.file_name().to_string_lossy().ends_with(".json"))
}

// pub(crate) fn $fun_name()() -> BTreeMap<String, String>
pub fn generate_artifact_getter(
    fun_name: &str,
    source_jsons: BTreeMap<ArtifactId, FileContent>,
) -> String {
    let mut artifacts_list = String::new();

    for (artifact_id, file_content) in source_jsons {
        write!(
            artifacts_list,
            r###"
        (
            "{}",
            r#"{}"#
        ),"###,
            artifact_id, file_content
        )
        .unwrap();
    }

    format!(
        r###"pub(crate) fn {}() -> BTreeMap<String, String> {{
    [{}
    ]
    .into_iter()
    .map(|(k, v)| (k.to_owned(), v.to_owned()))
    .collect()
}}"###,
        fun_name, artifacts_list
    )
}

/// pub(crate) fn $fun_name() -> &'static str
pub fn generate_list_getter(fun_name: &str, source_json: FileContent) -> String {
    format!(
        r###"pub(crate) fn {}() -> &'static str {{
    r#"{}"#
}}"###,
        fun_name, source_json
    )
}

/// pub(crate) fn $array_name() -> [&'a str; $ids.len]
pub fn generate_ids_array(array_name: &str, ids: BTreeSet<ArtifactId>) -> String {
    let mut ids_list = String::new();

    for id in &ids {
        write!(
            ids_list,
            r#"
        "{}","#,
            id
        )
        .unwrap();
    }

    format!(
        r###"pub(crate) const fn {}<'a>() -> [&'a str; {}] {{
    [{}
    ]
}}"###,
        array_name,
        ids.len(),
        ids_list,
    )
}

#[cfg(test)]
mod tests {
    use crate::get_temp_dir;

    use super::*;

    #[test]
    fn generate_ids_array_with_empty_data() {
        assert_eq!(
            generate_ids_array("snapshots_digests", BTreeSet::new()),
            "pub(crate) const fn snapshots_digests<'a>() -> [&'a str; 0] {
    [
    ]
}"
        );
    }

    #[test]
    fn generate_ids_array_with_non_empty_data() {
        assert_eq!(
            generate_ids_array(
                "snapshots_digests",
                BTreeSet::from_iter(["abc".to_string(), "def".to_string(), "hij".to_string()])
            ),
            r#"pub(crate) const fn snapshots_digests<'a>() -> [&'a str; 3] {
    [
        "abc",
        "def",
        "hij",
    ]
}"#
        );
    }

    #[test]
    fn assemble_code_with_btree_use() {
        assert_eq!(
            "use std::collections::BTreeMap;

fn a() {}

fn b() {}
",
            FakeAggregatorData::assemble_code(
                &["fn a() {}".to_string(), "fn b() {}".to_string()],
                true
            )
        )
    }

    #[test]
    fn assemble_code_without_btree_use() {
        assert_eq!(
            "fn a() {}

fn b() {}
",
            FakeAggregatorData::assemble_code(
                &["fn a() {}".to_string(), "fn b() {}".to_string()],
                false
            )
        )
    }

    #[test]
    fn parse_artifacts_json_into_btree_of_key_and_pretty_sub_json() {
        let dir = get_temp_dir("read_artifacts_json_file");
        let file = dir.join("test.json");
        fs::write(
            &file,
            r#"{
    "hash1": { "name": "artifact1" },
    "hash2": { "name": "artifact2" }
}"#,
        )
        .unwrap();

        let id_per_json = FakeAggregatorData::read_artifacts_json_file(&file);

        let expected = BTreeMap::from([
            (
                "hash1".to_string(),
                r#"{
  "name": "artifact1"
}"#
                .to_string(),
            ),
            (
                "hash2".to_string(),
                r#"{
  "name": "artifact2"
}"#
                .to_string(),
            ),
        ]);
        assert_eq!(expected, id_per_json);
    }

    #[test]
    fn extract_csd_epochs_with_valid_data() {
        let mut csds = BTreeMap::new();
        csds.insert(
            "csd-123".to_string(),
            r#"{"hash": "csd-123", "epoch": 123}"#.to_string(),
        );
        csds.insert(
            "csd-456".to_string(),
            r#"{"hash": "csd-456", "epoch": 456}"#.to_string(),
        );

        let epochs = extract_cardano_stake_distribution_epochs(&csds);

        assert_eq!(epochs, vec![123.to_string(), 456.to_string()]);
    }

    #[test]
    #[should_panic(expected = "Failed to parse JSON in csd content")]
    fn extract_csd_epochs_with_invalid_json() {
        let mut csds = BTreeMap::new();
        csds.insert(
            "csd-123".to_string(),
            r#""hash": "csd-123", "epoch": "123"#.to_string(),
        );

        extract_cardano_stake_distribution_epochs(&csds);
    }

    #[test]
    #[should_panic(expected = "Epoch not found or invalid in csd content")]
    fn test_extract_csd_epochs_with_missing_epoch() {
        let mut csds = BTreeMap::new();
        csds.insert("csd-123".to_string(), r#"{"hash": "csd-123"}"#.to_string());

        extract_cardano_stake_distribution_epochs(&csds);
    }

    #[test]
    fn test_extract_csd_epochs_with_empty_map() {
        let csds = BTreeMap::new();

        let epochs = extract_cardano_stake_distribution_epochs(&csds);

        assert!(epochs.is_empty());
    }
}