oxirs-fuseki 0.2.4

//! # Store - extract_data_block_group Methods
//!
//! This module contains method implementations for `Store`.
//!
//! 🤖 Generated with [SplitRS](https://github.com/cool-japan/splitrs)

use super::*;
use std::collections::{HashMap, HashSet};

impl Store {
    /// Extract data block from SPARQL update (between { and })
    pub(super) fn extract_data_block(&self, sparql: &str, operation: &str) -> FusekiResult<String> {
        let operation_upper = operation.to_uppercase();
        let sparql_upper = sparql.to_uppercase();
        let operation_pos = sparql_upper.find(&operation_upper).ok_or_else(|| {
            FusekiError::update_execution(format!("Operation '{operation}' not found"))
        })?;
        let remaining = &sparql[operation_pos + operation.len()..];
        let open_brace_pos = remaining.find('{').ok_or_else(|| {
            FusekiError::update_execution("Opening brace '{' not found".to_string())
        })?;
        let mut brace_count = 0;
        let mut close_brace_pos = None;
        let chars: Vec<char> = remaining.chars().collect();
        for (i, &ch) in chars.iter().enumerate().skip(open_brace_pos) {
            match ch {
                '{' => brace_count += 1,
                '}' => {
                    brace_count -= 1;
                    if brace_count == 0 {
                        close_brace_pos = Some(i);
                        break;
                    }
                }
                _ => {}
            }
        }
        let close_brace_pos = close_brace_pos.ok_or_else(|| {
            FusekiError::update_execution("Matching closing brace '}' not found".to_string())
        })?;
        let data_block = &remaining[open_brace_pos + 1..close_brace_pos];
        Ok(data_block.trim().to_string())
    }
}