GUACAMOLE-926: Improve error handling for invalid, missing connection data.

guacamole/src/main/frontend/src/app/import/services/connectionCSVService.js

@@ -322,10 +322,32 @@ angular.module('import').factory('connectionCSVService',
                         // of the header
                         const value = fetchFieldAtIndex(row);
 
+                        // If no value is provided, do not check the validity
+                        // of the parameter/attribute. Doing so would prevent
+                        // the import of a list of mixed protocol types, where
+                        // fields are only populated for protocols for which
+                        // they are valid parameters. If a value IS provided,
+                        // it must be a valid parameter or attribute for the
+                        // current protocol, which will be checked below.
+                        if (!value)
+                            return {};
+
                         // The protocol may determine whether a field is
                         // a parameter or an attribute (or both)
                         const protocol = transformConfig.protocolGetter(row);
 
+                        // Any errors encountered while processing this row
+                        const errors = [];
+
+                        // Before checking whether it's an attribute or protocol,
+                        // make sure this is a valid protocol to start
+                        if (!protocolParameters[protocol])
+
+                            // If the protocol is invalid, do not throw an error
+                            // here - this will be handled further downstream
+                            // by non-CSV-specific error handling
+                            return {};
+
                         // Determine if the field refers to an attribute or a
                         // parameter (or both, which is an error)
                         const isAttribute = !!attributes[name];
@@ -336,24 +358,24 @@ angular.module('import').factory('connectionCSVService',
                         // parameter with the provided name, it's impossible to
                         // figure out which this should be
                         if (isAttribute && isParameter)
-                            throw new ParseError({
+                            errors.push(new ParseError({
                                 message: 'Ambiguous CSV Header: ' + header,
                                 key: 'IMPORT.ERROR_AMBIGUOUS_CSV_HEADER',
                                 variables: { HEADER: header }
-                            });
+                            }));
 
                         // It's neither an attribute or a parameter
                         else if (!isAttribute && !isParameter)
-                            throw new ParseError({
+                            errors.push(new ParseError({
                                 message: 'Invalid CSV Header: ' + header,
                                 key: 'IMPORT.ERROR_INVALID_CSV_HEADER',
                                 variables: { HEADER: header }
-                            });
+                            }));
 
                         // Choose the appropriate type
                         const type = isAttribute ? 'attributes' : 'parameters';
 
-                        return { type, name, value };
+                        return { type, name, value, errors };
                     });
             });
 
@@ -364,19 +386,20 @@ angular.module('import').factory('connectionCSVService',
                 parameterOrAttributeGetters
             } = transformConfig;
 
-            // Fail if the name wasn't provided
+            // Fail if the name wasn't provided. Note that this is a file-level
+            // error, not specific to any connection.
             if (!nameGetter)
-                return deferred.reject(new ParseError({
+                throw new ParseError({
                     message: 'The connection name must be provided',
-                    key: 'IMPORT.ERROR_REQUIRED_NAME'
+                    key: 'IMPORT.ERROR_REQUIRED_NAME_FILE'
-                }));
+                });
 
             // Fail if the protocol wasn't provided
             if (!protocolGetter)
-                return deferred.reject(new ParseError({
+                throw new ParseError({
                     message: 'The connection protocol must be provided',
-                    key: 'IMPORT.ERROR_REQUIRED_PROTOCOL'
+                    key: 'IMPORT.ERROR_REQUIRED_PROTOCOL_FILE'
-                }));
+                });
 
             // The function to transform a CSV row into a connection object
             deferred.resolve(function transformCSVRow(row) {
@@ -409,14 +432,20 @@ angular.module('import').factory('connectionCSVService',
                     ...parameterOrAttributeGetters.reduce((values, getter) => {
 
                         // Determine the type, name, and value
-                        const { type, name, value } = getter(row);
+                        const { type, name, value, errors } = getter(row);
 
-                        // Set the value and continue on to the next attribute
+                        // Set the value if available
-                        // or parameter
+                        if (type && name && value)
-                        values[type][name] = value;
+                            values[type][name] = value;
+
+                        // If there were errors
+                        if (errors && errors.length)
+                            values.errors = [...values.errors, ...errors];
+
+                        // Continue on to the next attribute or parameter
                         return values;
 
-                    }, {parameters: {}, attributes: {}})
+                    }, {parameters: {}, attributes: {}, errors: []})
 
                 });
 

guacamole/src/main/frontend/src/app/import/services/connectionParseService.js

@@ -271,6 +271,13 @@ angular.module('import').factory('connectionParseService',
                 // to be translated into an absolute path starting at the root
                 group = connection.group;
 
+                // If the provided group isn't a string, it can never be valid
+                if (typeof group !== 'string')
+                    throw new ParseError({
+                        message: 'Invalid group type - must be a string',
+                        key: 'IMPORT.ERROR_INVALID_GROUP_TYPE'
+                    });
+
                 // Allow the group to start with a leading slash instead instead
                 // of explicitly requiring the root connection group
                 if (group.startsWith('/'))
@@ -351,6 +358,84 @@ angular.module('import').factory('connectionParseService',
         });
     }
 
+    /**
+     * Returns a promise that resolves to a map of all valid protocols to the
+     * boolean value "true", i.e. a set of all valid protocols.
+     *
+     * @returns {Promise.<Object.<String, Boolean>>}
+     *     A promise that resolves to a set of all valid protocols.
+     */
+    function getValidProtocols() {
+
+        // The current data source - the one that the connections will be
+        // imported into
+        const dataSource = $routeParams.dataSource;
+
+        // Fetch the protocols and convert to a set of valid protocol names
+        return schemaService.getProtocols(dataSource).then(
+                protocols => _.mapValues(protocols, () => true));
+    }
+
+    /**
+     * Return a list of field-level errors for the provided connection,
+     * such as missing or invalid fields that are not dependant on the
+     * connection group heirarchy.
+     *
+     * @param {ImportConnection} connection
+     *     The connection object to check field values on.
+     *
+     * @param {Object.<String, Boolean>} protocols
+     *     A set of valid protocols, such as the one returned by 
+     *     getValidProtocols().
+     *
+     * @returns {ParseError[]}
+     *     A list of field-level errors for the provided connection.
+     */
+    function getFieldErrors(connection, protocols) {
+        const connectionErrors = [];
+
+        // Ensure that a protocol was specified for this connection
+        const protocol = connection.protocol;
+        if (!protocol)
+            connectionErrors.push(new ParseError({
+                message: 'Missing required protocol field',
+                key: 'IMPORT.ERROR_REQUIRED_PROTOCOL_CONNECTION'
+            }));
+
+        // Ensure that a valid protocol was specified for this connection
+        if (!protocols[protocol])
+            connectionErrors.push(new ParseError({
+                message: 'Invalid protocol: ' + protocol,
+                key: 'IMPORT.ERROR_INVALID_PROTOCOL',
+                variables: { PROTOCOL: protocol }
+            }));
+
+        // Ensure that a name was specified for this connection
+        if (!connection.name)
+            connectionErrors.push(new ParseError({
+                message: 'Missing required name field',
+                key: 'IMPORT.ERROR_REQUIRED_NAME_CONNECTION'
+            }));
+
+        // Ensure that the specified user list, if any, is an array
+        const users = connection.users;
+        if (users && !Array.isArray(users))
+            connectionErrors.push(new ParseError({
+                message: 'Invalid users list - must be an array',
+                key: 'IMPORT.ERROR_INVALID_USERS_TYPE'
+            }));
+
+        // Ensure that the specified user list, if any, is an array
+        const groups = connection.groups;
+        if (groups && !Array.isArray(groups))
+            connectionErrors.push(new ParseError({
+                message: 'Invalid groups list - must be an array',
+                key: 'IMPORT.ERROR_INVALID_USER_GROUPS_TYPE'
+            }));
+
+        return connectionErrors;
+    }
+
     /**
      * Convert a provided connection array into a ParseResult. Any provided
      * transform functions will be run on each entry in `connectionData` before
@@ -384,8 +469,12 @@ angular.module('import').factory('connectionParseService',
 
         let index = 0;
 
-        // Get the group transformer to apply to each connection
+        // Get the tree transformer and valid protocol set
-        return getTreeTransformer(importConfig).then(treeTransformer =>
+        return $q.all({
+            treeTransformer : getTreeTransformer(importConfig),
+            protocols       : getValidProtocols()
+        })
+        .then(({treeTransformer, protocols}) =>
                 connectionData.reduce((parseResult, data) => {
 
             const { patches, users, groups, groupPaths } = parseResult;
@@ -396,8 +485,13 @@ angular.module('import').factory('connectionParseService',
                 connectionObject = transform(connectionObject);
             });
 
-            // All errors found while parsing this connection
+            // All errors encountered while running the connection through the
-            const connectionErrors = [];
+            // provided transform, starting with those encountered during
+            // the provided transforms, and any errors from missing fields
+            const connectionErrors = [
+                ..._.get(connectionObject, 'errors', []),
+                ...getFieldErrors(connectionObject, protocols)
+            ];
 
             // Determine the connection's place in the connection group tree
             try {

guacamole/src/main/frontend/src/app/import/types/ImportConnection.js

@@ -114,6 +114,13 @@ angular.module('import').factory('ImportConnection', ['$injector',
          */
         this.importMode = template.importMode || ImportConnection.ImportMode.CREATE;
 
+        /**
+         * Any errors specific to this connection encountered while parsing.
+         *
+         * @type ParseError[]
+         */
+        this.errors = template.errors || [];
+        
     };
 
     /**

guacamole/src/main/frontend/src/translations/en.json

@@ -211,13 +211,19 @@
         "ERROR_INVALID_MIME_TYPE"            : "Unsupported file type: \"{TYPE}\"",
         "ERROR_INVALID_GROUP"                : "No group matching \"{GROUP}\" found",
         "ERROR_INVALID_GROUP_IDENTIFIER"     : "No connection group with identifier \"{IDENTIFIER}\" found",
+        "ERROR_INVALID_GROUP_TYPE"           : "Invalid group - must be a string.",
+        "ERROR_INVALID_PROTOCOL"             : "Invalid protocol \"{PROTOCOL}\"",
+        "ERROR_INVALID_USER_GROUPS_TYPE"     : "Invalid user groups - must be an array of user group identifiers.",
+        "ERROR_INVALID_USERS_TYPE"           : "Invalid users - must be an array of user identifiers.",
         "ERROR_NO_FILE_SUPPLIED"             : "Please select a file to import",
         "ERROR_PARSE_FAILURE_CSV"            : "Please make sure your file is valid CSV. Parsing failed with error \"{ERROR}\". ",
         "ERROR_PARSE_FAILURE_JSON"           : "Please make sure your file is valid JSON. Parsing failed with error \"{ERROR}\". ",
         "ERROR_PARSE_FAILURE_YAML"           : "Please make sure your file is valid YAML. Parsing failed with error \"{ERROR}\". ",
         "ERROR_REJECT_UPDATE_CONNECTION"     : "Connection \"{NAME}\" already exists at \"{PATH}\"",
-        "ERROR_REQUIRED_NAME"                : "No connection name found in the provided file",
+        "ERROR_REQUIRED_NAME_CONNECTION"     : "The connection name is required",
-        "ERROR_REQUIRED_PROTOCOL"            : "No connection protocol found in the provided file",
+        "ERROR_REQUIRED_PROTOCOL_CONNECTION" : "The connection protocol is required",
+        "ERROR_REQUIRED_NAME_FILE"           : "No connection name found in the provided file",
+        "ERROR_REQUIRED_PROTOCOL_FILE"       : "No connection protocol found in the provided file",
 
         "FIELD_PLACEHOLDER_FILTER" : "@:APP.FIELD_PLACEHOLDER_FILTER",