first commit

common/Files/Traits/HandlesEntryPaths.php

@@ -0,0 +1,113 @@
+<?php
+
+namespace Common\Files\Traits;
+
+use DB;
+use Illuminate\Database\Eloquent\Builder;
+
+trait HandlesEntryPaths
+{
+    public function getPathAttribute($value): string
+    {
+        if (!$value) {
+            $value = '';
+        }
+
+        $parts = explode('/', $value);
+
+        $parts = array_map(function ($part) {
+            return $this->decodePathId($part);
+        }, array_filter($parts));
+
+        return implode('/', $parts);
+    }
+
+    public function setPathAttribute($value)
+    {
+        if (!$value) {
+            $value = '';
+        }
+
+        $this->attributes['path'] = $this->encodePath($value);
+    }
+
+    public function updatePaths(
+        string $oldPath,
+        string $newPath,
+        $entryIds = null,
+    ): void {
+        $oldPath = $this->encodePath($oldPath);
+        $newPath = $this->encodePath($newPath);
+
+        $query = $this->newQuery();
+
+        if ($entryIds) {
+            $query->whereIn('id', $entryIds);
+        }
+
+        $query->where('path', 'LIKE', "$oldPath%")->update([
+            'path' => DB::raw("REPLACE(path, '$oldPath', '$newPath')"),
+        ]);
+    }
+
+    /**
+     * Loads current model as well as all children.
+     */
+    public function scopeAllChildren(Builder $builder): Builder
+    {
+        return $builder->where('path', 'like', $this->attributes['path'] . '%');
+    }
+
+    public function getParentIds(): array
+    {
+        $folderIds = explode('/', $this->path);
+        array_pop($folderIds);
+        return $folderIds;
+    }
+
+    public function scopeAllParents(Builder $builder): Builder
+    {
+        return $builder->whereIn('id', $this->getParentIds())->orderBy('path');
+    }
+
+    /**
+     * Generate full path for current entry, based on its parent.
+     */
+    public function generatePath(): void
+    {
+        if (!$this->exists) {
+            return;
+        }
+
+        $this->path = $this->id;
+
+        if ($this->parent_id && ($parent = $this->find($this->parent_id))) {
+            $this->path = "{$parent->path}/$this->path";
+        }
+
+        $this->save();
+    }
+
+    private function encodePath($path): string
+    {
+        $parts = explode('/', (string) $path);
+
+        $parts = array_filter($parts);
+
+        $parts = array_map(function ($part) {
+            return $this->encodePathId($part);
+        }, $parts);
+
+        return implode('/', $parts);
+    }
+
+    private function encodePathId($id): string
+    {
+        return base_convert($id, 10, 36);
+    }
+
+    private function decodePathId($id): string
+    {
+        return base_convert($id, 36, 10);
+    }
+}