1 files changed, 75 insertions, 0 deletions
diff --git a/rplugin/python3/deoplete/sources/beancount.py b/rplugin/python3/deoplete/sources/beancount.py
new file mode 100644
index 0000000..4618105
--- /dev/null
+++ b/rplugin/python3/deoplete/sources/beancount.py
@@ -0,0 +1,75 @@
+import re
+
+from deoplete.source.base import Base
+
+try:
+    from beancount.loader import load_file
+    from beancount.core.data import Open, Transaction
+    HAS_BEANCOUNT = True
+except ImportError:
+    HAS_BEANCOUNT = False
+
+DIRECTIVES = ['open', 'close', 'commodity', 'txn', 'balance', 'pad', 'note',
+              'document', 'price', 'event', 'query', 'custom']
+
+
+class Source(Base):
+    def __init__(self, vim):
+        super().__init__(vim)
+        self.vim = vim
+
+        self.name = 'beancount'
+        self.mark = '[bc]'
+        self.filetypes = ['beancount']
+        self.min_pattern_length = 0
+
+    def on_init(self, context):
+        if not HAS_BEANCOUNT:
+            self.error('Importing beancount failed.')
+
+    def on_event(self, context):
+        self.__make_cache(context)
+
+    def get_complete_position(self, context):
+        m = re.search(r'\S*$', context['input'])
+        return m.start() if m else -1
+
+    def gather_candidates(self, context):
+        if re.match(r'^\d{4}[/-]\d\d[/-]\d\d \w*$', context['input']):
+            return DIRECTIVES
+        if not context['complete_str']:
+            return []
+        first = context['complete_str'][0]
+        if first == '#':
+            return ['#' + w for w in self._tags]
+        elif first == '^':
+            return ['^' + w for w in self._links]
+        elif first == '"':
+            return ['"{}"'.format(w) for w in self._payees]
+        return self._accounts
+
+    def __make_cache(self, context):
+        accounts = set()
+        links = set()
+        payees = set()
+        tags = set()
+        if HAS_BEANCOUNT:
+            entries, _, _ = load_file(self.vim.eval("expand('%')"))
+        else:
+            entries = []
+
+        for entry in entries:
+            if isinstance(entry, Open):
+                accounts.add(entry.account)
+            elif isinstance(entry, Transaction):
+                if entry.payee:
+                    payees.add(entry.payee)
+            if hasattr(entry, 'links') and entry.links:
+                links.update(entry.links)
+            if hasattr(entry, 'tags') and entry.tags:
+                tags.update(entry.tags)
+
+        self._accounts = sorted(accounts)
+        self._links = sorted(links)
+        self._payees = sorted(payees)
+        self._tags = sorted(tags)