upd

internal/latex/latex2ascii.go

@@ -0,0 +1,57 @@
+package latex
+
+import (
+	"regexp"
+	"strings"
+)
+
+func ConvertLaTeXToASCII(input string) string {
+	s := input
+
+	replacements := []struct {
+		pattern *regexp.Regexp
+		replace string
+	}{
+		// Fractions: \frac{a}{b} -> (a)/(b)
+		{regexp.MustCompile(`\\frac\{([^{}]+)\}\{([^{}]+)\}`), `($1)/($2)`},
+
+		// Square roots: \sqrt{x} -> sqrt(x)
+		{regexp.MustCompile(`\\sqrt\{([^{}]+)\}`), `sqrt($1)`},
+
+		// Powers: x^{y} -> x^y
+		{regexp.MustCompile(`\{?\^\{([^{}]+)\}\}?`), `^$1`},
+
+		// Subscripts: x_{i} -> x_i
+		{regexp.MustCompile(`_\{([^{}]+)\}`), `_$1`},
+
+		// Greek letters (common subset)
+		{regexp.MustCompile(`\\alpha`), "alpha"},
+		{regexp.MustCompile(`\\beta`), "beta"},
+		{regexp.MustCompile(`\\gamma`), "gamma"},
+		{regexp.MustCompile(`\\delta`), "delta"},
+		{regexp.MustCompile(`\\theta`), "theta"},
+		{regexp.MustCompile(`\\pi`), "pi"},
+		{regexp.MustCompile(`\\lambda`), "lambda"},
+
+		// Common symbols
+		{regexp.MustCompile(`\\times`), "*"},
+		{regexp.MustCompile(`\\cdot`), "*"},
+		{regexp.MustCompile(`\\pm`), "+/-"},
+		{regexp.MustCompile(`\\leq`), "<="},
+		{regexp.MustCompile(`\\geq`), ">="},
+		{regexp.MustCompile(`\\neq`), "!="},
+
+		// Remove LaTeX math wrappers
+		{regexp.MustCompile(`\\left|\\right`), ""},
+		{regexp.MustCompile(`\\[|\\]|\$`), ""},
+	}
+
+	for _, r := range replacements {
+		s = r.pattern.ReplaceAllString(s, r.replace)
+	}
+
+	// Clean extra spaces
+	s = strings.TrimSpace(strings.Join(strings.Fields(s), " "))
+
+	return s
+}