braze-sync 0.10.0

//! `braze-sync export` — pull current state from Braze into local files.

use crate::braze::error::BrazeApiError;
use crate::braze::BrazeClient;
use crate::config::{is_excluded, ResolvedConfig};
use crate::fs::{catalog_io, content_block_io, custom_attribute_io, email_template_io, tag_io};
use crate::resource::{CustomAttributeRegistry, ResourceKind, Tag, TagRegistry};
use anyhow::Context as _;
use clap::Args;
use futures::stream::{StreamExt, TryStreamExt};
use regex_lite::Regex;
use std::collections::BTreeSet;
use std::path::Path;

use super::{selected_kinds, warn_if_name_excluded, FETCH_CONCURRENCY};

#[derive(Args, Debug, Default)]
pub struct ExportArgs {
    /// Limit export to a specific resource kind. Omit to export every
    /// enabled resource kind in turn.
    #[arg(long, value_enum)]
    pub resource: Option<ResourceKind>,

    /// When `--resource` is given, optionally restrict to a single named
    /// resource. Requires `--resource`.
    #[arg(long, requires = "resource")]
    pub name: Option<String>,
}

pub async fn run(
    args: &ExportArgs,
    resolved: ResolvedConfig,
    config_dir: &Path,
) -> anyhow::Result<()> {
    let catalogs_root = config_dir.join(&resolved.resources.catalog_schema.path);
    let content_blocks_root = config_dir.join(&resolved.resources.content_block.path);
    let email_templates_root = config_dir.join(&resolved.resources.email_template.path);
    let custom_attributes_path = config_dir.join(&resolved.resources.custom_attribute.path);
    let tags_path = config_dir.join(&resolved.resources.tag.path);
    let client = BrazeClient::from_resolved(&resolved);
    let kinds = selected_kinds(args.resource, &resolved.resources);

    let mut total_written: usize = 0;
    for kind in kinds {
        // `custom_attribute` ignores `--name` (registry is a single file),
        // so skipping by exclude match before dispatching wouldn't fit —
        // handle it per-arm alongside the existing --name warning.
        if !matches!(kind, ResourceKind::CustomAttribute | ResourceKind::Tag)
            && warn_if_name_excluded(kind, args.name.as_deref(), resolved.excludes_for(kind))
        {
            continue;
        }
        match kind {
            ResourceKind::CatalogSchema => {
                let n = export_catalog_schemas(
                    &client,
                    &catalogs_root,
                    args.name.as_deref(),
                    resolved.excludes_for(ResourceKind::CatalogSchema),
                )
                .await
                .context("exporting catalog_schema")?;
                eprintln!("✓ catalog_schema: exported {n} resource(s)");
                total_written += n;
            }
            ResourceKind::ContentBlock => {
                let n = export_content_blocks(
                    &client,
                    &content_blocks_root,
                    args.name.as_deref(),
                    resolved.excludes_for(ResourceKind::ContentBlock),
                )
                .await
                .context("exporting content_block")?;
                eprintln!("✓ content_block: exported {n} resource(s)");
                total_written += n;
            }
            ResourceKind::EmailTemplate => {
                let n = export_email_templates(
                    &client,
                    &email_templates_root,
                    args.name.as_deref(),
                    resolved.excludes_for(ResourceKind::EmailTemplate),
                )
                .await
                .context("exporting email_template")?;
                eprintln!("✓ email_template: exported {n} resource(s)");
                total_written += n;
            }
            ResourceKind::CustomAttribute => {
                if args.name.is_some() {
                    eprintln!(
                        "⚠ custom_attribute: --name is not supported for export \
                         (the registry is a single file); exporting all attributes"
                    );
                }
                let n = export_custom_attributes(
                    &client,
                    &custom_attributes_path,
                    resolved.excludes_for(ResourceKind::CustomAttribute),
                )
                .await
                .context("exporting custom_attribute")?;
                eprintln!("✓ custom_attribute: exported {n} attribute(s)");
                total_written += n;
            }
            ResourceKind::Tag => {
                if args.name.is_some() {
                    eprintln!(
                        "⚠ tag: --name is not supported for export \
                         (the registry is a single file); exporting all tags"
                    );
                }
                let n = export_tags(
                    config_dir,
                    &resolved,
                    &tags_path,
                    resolved.excludes_for(ResourceKind::Tag),
                )
                .context("exporting tag")?;
                eprintln!("✓ tag: exported {n} tag(s)");
                total_written += n;
            }
        }
    }

    eprintln!("done: {total_written} resource(s) written");
    Ok(())
}

async fn export_catalog_schemas(
    client: &BrazeClient,
    catalogs_root: &Path,
    name_filter: Option<&str>,
    excludes: &[Regex],
) -> anyhow::Result<usize> {
    let catalogs = match name_filter {
        Some(name) => match client.get_catalog(name).await {
            Ok(c) => vec![c],
            // Missing remote is informational, not a hard error.
            Err(BrazeApiError::NotFound { .. }) => {
                eprintln!("⚠ catalog_schema: '{name}' not found in Braze");
                Vec::new()
            }
            Err(e) => return Err(e.into()),
        },
        None => client.list_catalogs().await?,
    };

    let filtered: Vec<_> = catalogs
        .into_iter()
        .filter(|c| !is_excluded(&c.name, excludes))
        .collect();
    let count = filtered.len();
    for cat in filtered {
        catalog_io::save_schema(catalogs_root, &cat)?;
    }
    Ok(count)
}

/// Lists first to discover ids, then fetches `/info` per block. With
/// `--name`, the list still happens (to translate name → id) but only
/// the matching block's body is fetched.
async fn export_content_blocks(
    client: &BrazeClient,
    content_blocks_root: &Path,
    name_filter: Option<&str>,
    excludes: &[Regex],
) -> anyhow::Result<usize> {
    let summaries = client.list_content_blocks().await?;
    let targets: Vec<_> = summaries
        .into_iter()
        .filter(|s| name_filter.is_none_or(|n| s.name == n))
        .filter(|s| !is_excluded(&s.name, excludes))
        .collect();

    if targets.is_empty() {
        if let Some(name) = name_filter {
            eprintln!("⚠ content_block: '{name}' not found in Braze");
        }
        return Ok(0);
    }

    let blocks: Vec<crate::resource::ContentBlock> =
        futures::stream::iter(targets.iter().map(|s| {
            let name = s.name.as_str();
            let id = s.content_block_id.as_str();
            async move {
                client
                    .get_content_block(id)
                    .await
                    .with_context(|| format!("fetching content block '{name}'"))
            }
        }))
        .buffer_unordered(FETCH_CONCURRENCY)
        .try_collect()
        .await?;

    for cb in &blocks {
        content_block_io::save_content_block(content_blocks_root, cb)?;
    }
    Ok(blocks.len())
}

/// Same list-then-fetch pattern as content blocks.
async fn export_email_templates(
    client: &BrazeClient,
    email_templates_root: &Path,
    name_filter: Option<&str>,
    excludes: &[Regex],
) -> anyhow::Result<usize> {
    let summaries = client.list_email_templates().await?;
    let targets: Vec<_> = summaries
        .into_iter()
        .filter(|s| name_filter.is_none_or(|n| s.name == n))
        .filter(|s| !is_excluded(&s.name, excludes))
        .collect();

    if targets.is_empty() {
        if let Some(name) = name_filter {
            eprintln!("⚠ email_template: '{name}' not found in Braze");
        }
        return Ok(0);
    }

    let templates: Vec<crate::resource::EmailTemplate> =
        futures::stream::iter(targets.iter().map(|s| {
            let name = s.name.as_str();
            let id = s.email_template_id.as_str();
            async move {
                client
                    .get_email_template(id)
                    .await
                    .with_context(|| format!("fetching email template '{name}'"))
            }
        }))
        .buffer_unordered(FETCH_CONCURRENCY)
        .try_collect()
        .await?;

    for et in &templates {
        email_template_io::save_email_template(email_templates_root, et)?;
    }
    Ok(templates.len())
}

/// Aggregate tag names from local content_block + email_template files.
///
/// Braze does not expose a public REST API for workspace tags, so the
/// registry is derived from the local Git state instead of a remote
/// list. Operators are expected to run regular `export` first (to refresh
/// content_block / email_template files), then `export tag` to rebuild
/// the registry from the freshly-synced frontmatter. Tags found here are
/// the union of every `tags:` array on every local resource, minus
/// `tag.exclude_patterns`.
fn export_tags(
    config_dir: &Path,
    resolved: &ResolvedConfig,
    registry_path: &Path,
    excludes: &[Regex],
) -> anyhow::Result<usize> {
    let referenced = collect_local_tag_references(config_dir, resolved)?;
    let tags: Vec<Tag> = referenced
        .into_iter()
        .filter(|name| !is_excluded(name, excludes))
        .map(|name| Tag {
            name,
            description: None,
        })
        .collect();
    let count = tags.len();
    let registry = TagRegistry { tags };
    tag_io::save_registry(registry_path, &registry)?;
    Ok(count)
}

/// Walk every local resource directory the config knows about and
/// collect the union of `tags:` referenced on the resources. Used by
/// both `export` (to rebuild registry) and `apply`/`validate`
/// (to cross-check the registry against actual usage).
pub(crate) fn collect_local_tag_references(
    config_dir: &Path,
    resolved: &ResolvedConfig,
) -> anyhow::Result<BTreeSet<String>> {
    let mut tags: BTreeSet<String> = BTreeSet::new();

    if resolved.resources.content_block.enabled {
        let root = config_dir.join(&resolved.resources.content_block.path);
        let blocks = content_block_io::load_all_content_blocks(&root)
            .context("loading local content_blocks for tag aggregation")?;
        for cb in &blocks {
            for t in &cb.tags {
                tags.insert(t.clone());
            }
        }
    }

    if resolved.resources.email_template.enabled {
        let root = config_dir.join(&resolved.resources.email_template.path);
        let templates = crate::fs::email_template_io::load_all_email_templates(&root)
            .context("loading local email_templates for tag aggregation")?;
        for et in &templates {
            for t in &et.tags {
                tags.insert(t.clone());
            }
        }
    }

    Ok(tags)
}

async fn export_custom_attributes(
    client: &BrazeClient,
    registry_path: &Path,
    excludes: &[Regex],
) -> anyhow::Result<usize> {
    let attrs: Vec<_> = client
        .list_custom_attributes()
        .await?
        .into_iter()
        .filter(|a| !is_excluded(&a.name, excludes))
        .collect();
    let count = attrs.len();
    let registry = CustomAttributeRegistry { attributes: attrs };
    custom_attribute_io::save_registry(registry_path, &registry)?;
    Ok(count)
}