Kode for å skrive ut commit-formatet.

python/fileformat.py

@@ -0,0 +1,90 @@
+fields = {
+    'book':
+        [('isbn', 's'), ('title', 's'), ('category', 's'),
+         ('subtitle', 's'), ('persons', 'd'), ('publisher', 's'),
+         ('published_year', 's'), ('edition', 's'), ('num_pages', 's'),
+         ('series', 's'), ('description', 's'), # TODO picture, thumbnail
+         ('references', 'd')],
+    'person':
+        [('id', 's'), ('first_name', 's'), ('last_name', 's')],
+    'category':
+        [('id', 's'), ('name', 's'), ('placement', 'l')] }
+action_fields = {
+    'new-book':
+        { 'type': 'book',
+          'required': ['isbn', 'title', 'category'] },
+    'edit-book':
+        { 'type': 'book',
+          'required': ['isbn'] },
+    'delete-book':
+        { 'type': 'book',
+          'required': ['isbn'] },
+    'new-person':
+        { 'type': 'person',
+          'required': ['id', 'first_name', 'last_name'] },
+    'edit-person':
+        { 'type': 'person',
+          'required': ['id'] },
+    'delete-person':
+        { 'type': 'person',
+          'required': ['id'] },
+    'new-category':
+        { 'type': 'category',
+          'required': ['id', 'name'] },
+    'edit-category':
+        { 'type': 'category',
+          'required': ['id'] },
+    'delete-category':
+        { 'type': 'category',
+          'required': ['id'] } }
+
+def read_action(lines):
+    d = {}
+    lastfield = None
+    for line in lines:
+        if len(line) == 0:
+            raise 'Empty line in action'
+        if line[0] in [' ', '\t']: # continuation line
+            if not lastfield:
+                raise 'First line is continuation line'
+            d[lastfield] = d[lastfield] + '\n' + line.strip()
+        else:
+            field, value = line.split(':', 1)
+            # TODO skriv ferdig
+
+def write_field_value_str(val):
+    lines = ''
+    value_lines = val.split('\n')
+    for l in value_lines:
+        lines += ' ' + l + '\n'
+    return lines
+
+def write_field_value_dict(val):
+    lines = '\n'
+    for (key,values) in val.items():
+        for single_value in values:
+            lines += ' ' + key + ' ' + single_value + '\n'
+    return lines
+
+def write_field_value_list(val):
+    lines = ''
+    for single_value in val:
+        lines += ' ' + single_value
+    return lines
+
+def write_action(d):
+    action = d['action']
+    lines = 'action: ' + action + '\n'
+    data_type = action_fields[action]['type']
+    for field, ftype in fields[data_type]:
+        if field in d:
+            value_writer = {'s': write_field_value_str,
+                            'd': write_field_value_dict,
+                            'l': write_field_value_list}[ftype]
+            lines += field + ':' + value_writer(d[field])
+    return lines
+
+def write_actionlist(actions):
+    return '\n'.join(map(write_action, actions))
+
+# test: print write_actionlist([{'action':'new-book','isbn':'434545'},{'action':'edit-book','isbn':'654654745','persons':{'author':['ab','foo'],'illustrator':['moo']}},{'action':'edit-category','id':'matematikk','name':'Matematikk','placement':['T10','T11']}])