Add support for routines; state messages

app/classes/state/fs/DirectoryState.js

@@ -26,6 +26,14 @@ class DirectoryState extends State {
     async _path() {
         return this._host.get_path(this._config.path)
     }
+
+    failure_message() {
+        return `The path "${this._config.path}" does not exist on host "${this._host.name}."`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = DirectoryState

app/classes/state/fs/DownloadState.js

@@ -46,6 +46,14 @@ class DownloadState extends State {
         if ( !this._config.path ) throw new Error('Missing path config for DownloadState.')
         return this._host.get_path(this._config.path)
     }
+
+    failure_message() {
+        return `The downloaded file "${this._config.path}" does not exist on host "${this._host.name}."`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = DownloadState

app/classes/state/fs/FileState.js

@@ -31,6 +31,14 @@ class FileState extends State {
         if ( !this._config.path ) throw new Error('Missing path config for FileState.')
         return this._host.get_path(this._config.path)
     }
+
+    failure_message() {
+        return `The file "${this._config.path}" does not exist on the host "${this._host.name}."`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = FileState

app/classes/state/fs/OwnerState.js

@@ -39,6 +39,13 @@ class OwnerState extends State {
         return path
     }
 
+    failure_message() {
+        return `The ownership state of the file "${this._config.path}" on host "${this._host.name}" is invalid.`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = OwnerState

app/classes/state/fs/PackState.js

@@ -55,6 +55,14 @@ class PackState extends State {
         if ( !path.is_valid() ) throw new Error(`Invalid path for PathState: ${path}`)
         return path
     }
+
+    failure_message() {
+        return `The archive "${this._config.destination}" does not exist on the host "${this._host.name}."`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = PackState

app/classes/state/fs/PermissionState.js

@@ -34,6 +34,14 @@ class PermissionState extends State {
         if ( !path.is_valid() ) throw new Error(`Invalid path for PermissionState: ${path}`)
         return path
     }
+
+    failure_message() {
+        return `The resource permissions for "${this._config.path}" on host "${this._host.name}" are invalid.`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = PermissionState

app/classes/state/fs/UnpackState.js

@@ -58,6 +58,14 @@ class UnpackState extends State {
         if ( !path.is_directory() ) throw new Error(`Invalid extraction path. Must be a directory: ${path}`)
         return path
     }
+
+    failure_message() {
+        return `The unpacked archive does not exist at the path "${this._config.destination}" on host "${this._host.name}."`
+    }
+
+    check_message() {
+        return this.failure_message()
+    }
 }
 
 module.exports = exports = UnpackState