block logic

api/block/handle.go

@@ -0,0 +1,77 @@
+package block
+
+import (
+	"encoding/json"
+	"log/slog"
+	"net/http"
+	"os"
+	"path/filepath"
+
+	"git.oblat.lv/alex/triggerssmith/internal/config"
+)
+
+type Block struct {
+	Content string `json:"content"`
+	JS      string `json:"js"`
+	CSS     string `json:"css"`
+}
+
+func LoadHtmlBlock(cfg *config.Config) func(w http.ResponseWriter, r *http.Request) {
+	return func(w http.ResponseWriter, r *http.Request) {
+		if !cfg.Server.BlockConfig.Enabled {
+			http.Error(w, "Block serving is disabled", http.StatusNotImplemented)
+			return
+		}
+
+		blockPath := r.URL.Path[len("/api/block/"):]
+		block, err := LoadBlock(blockPath, cfg)
+		if err != nil {
+			http.Error(w, err.Error(), http.StatusInternalServerError)
+			return
+		}
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+		w.Write([]byte(block.ToJSON()))
+	}
+}
+
+// LoadBlock loads a block from the filesystem given its path and configuration.
+// It reads the content, JavaScript, and CSS files associated with the block.
+// If err is not nil, it indicates a failure in reading the block files.
+func LoadBlock(path string, cfg *config.Config) (*Block, error) {
+	slog.Debug("loading block", slog.String("path", path))
+	path = filepath.Join(cfg.Server.BlockConfig.BlockDir, path)
+	var block Block
+	var err error
+	contentPath := filepath.Join(path, "content.md")
+	jsPath := filepath.Join(path, "script.js")
+	cssPath := filepath.Join(path, "style.css")
+	if b, err := os.ReadFile(contentPath); err == nil {
+		block.Content = string(b)
+	} else {
+		slog.Warn("failed to read block content", slog.String("path", contentPath), slog.String("err", err.Error()))
+	}
+
+	if b, err := os.ReadFile(jsPath); err == nil {
+		block.JS = string(b)
+	} else {
+		slog.Warn("failed to read block JS", slog.String("path", contentPath), slog.String("err", err.Error()))
+	}
+
+	if b, err := os.ReadFile(cssPath); err == nil {
+		block.CSS = string(b)
+	} else {
+		slog.Warn("failed to read block CSS", slog.String("path", contentPath), slog.String("err", err.Error()))
+	}
+
+	return &block, err
+}
+
+func (b *Block) ToJSON() string {
+	jsonData, err := json.Marshal(b)
+	if err != nil {
+		slog.Error("failed to marshal block to JSON", slog.String("err", err.Error()))
+		return "{}"
+	}
+	return string(jsonData)
+}