Refactored, added comprehensive testing.

input/sources.go

@@ -0,0 +1,52 @@
+package input
+
+import (
+	"fmt"
+	"os"
+
+	"git.wisehodl.dev/jay/aicli/config"
+)
+
+// ReadPromptSources reads all prompt content from flags and files.
+// Returns arrays of prompt strings in source order.
+func ReadPromptSources(cfg config.ConfigData) ([]string, error) {
+	prompts := []string{}
+
+	// Add flag prompts first
+	prompts = append(prompts, cfg.PromptFlags...)
+
+	// Add prompt file contents
+	for _, path := range cfg.PromptPaths {
+		content, err := os.ReadFile(path)
+		if err != nil {
+			return nil, fmt.Errorf("read prompt file %s: %w", path, err)
+		}
+		prompts = append(prompts, string(content))
+	}
+
+	return prompts, nil
+}
+
+// ReadFileSources reads all input files specified in config.
+// Returns FileData array in source order.
+func ReadFileSources(cfg config.ConfigData) ([]FileData, error) {
+	files := []FileData{}
+
+	for _, path := range cfg.FilePaths {
+		if path == "" {
+			return nil, fmt.Errorf("empty file path provided")
+		}
+
+		content, err := os.ReadFile(path)
+		if err != nil {
+			return nil, fmt.Errorf("read file %s: %w", path, err)
+		}
+
+		files = append(files, FileData{
+			Path:    path,
+			Content: string(content),
+		})
+	}
+
+	return files, nil
+}