Transliterate Greek according to ELOT 743. Untested

src/greeklt/greek_iso_transliteration.py

@@ -0,0 +1,272 @@
+def greek_iso_transliteration(string: str):
+#   This should all probably be a CSV or something
+    el_low = [
+        "α",
+        "β",
+        "γ",
+        "δ",
+        "ε",
+        "ζ",
+        "η",
+        "θ",
+        "ι",
+        "κ",
+        "λ",
+        "μ",
+        "ν",
+        "ξ",
+        "ο",
+        "π",
+        "ρ",
+        "σ",
+        "τ",
+        "υ",
+        "φ",
+        "χ",
+        "ψ",
+        "ω"
+    ]
+    el_cap = [
+        "Α",
+        "Β",
+        "Γ",
+        "Δ",
+        "Ε",
+        "Ζ",
+        "Η",
+        "Θ",
+        "Ι",
+        "Κ",
+        "Λ",
+        "Μ",
+        "Ν",
+        "Ξ",
+        "Ο",
+        "Π",
+        "Ρ",
+        "Σ",
+        "Τ",
+        "Υ",
+        "Φ",
+        "Χ",
+        "Ψ",
+        "Ω"
+    ]
+    # TODO FIX Psari, not PSari
+    eng_low = [
+        "a",
+        "v",
+        "g",
+        "d",
+        "e",
+        "z",
+        "i",
+        "th",
+        "i",
+        "k",
+        "l",
+        "m",
+        "n",
+        "x",
+        "o",
+        "p",
+        "r",
+        "s",
+        "t",
+        "y",
+        "f",
+
+        "ch",
+        "ps",
+        "o"
+    ]
+    eng_cap = [
+        "A",
+        "V",
+        "G",
+        "D",
+        "E",
+        "Z",
+        "I",
+        "TH",
+        "I",
+        "K",
+        "L",
+        "M",
+        "N",
+        "X",
+        "O",
+        "P",
+        "R",
+        "S",
+        "T",
+        "Y",
+        "F",
+        "CH",
+        "PS",
+        "O"
+    ]
+    # Simple digraphs with no extra rules or edge cases
+    # No need for mixed casing "Γγ" or "Γξ" against Greek phonology
+    el_simple_digraphs = [
+        "γγ",
+        "γξ",
+        "γχ"
+    ]
+    el_simple_cap_digraphs = [
+        "ΓΓ",
+        "ΓΞ",
+        "ΓΧ"
+    ]
+    eng_simple_digraphs = [
+        "ng",
+        "nx",
+        "nch"
+    ]
+    eng_simple_cap_digraphs = [
+        "NG",
+        "NX",
+        "NCH"
+    ]
+
+    el_mono_digraph_sub = [
+        "Θ",
+        "Χ",
+        "Ψ"
+    ]
+#   Accent based digraphs
+#    el_low_acc_digraphs = [
+#        "άυ",
+#        "αϋ",
+#
+#        "έυ",
+#        "εϋ",
+#
+#        "ήυ",
+#        "ηϋ"
+#
+#    ]
+#    el_mix_acc_digraphs = [
+#        "Άυ",
+#        "Αϋ",
+#
+#        "Έυ",
+#      "Εϋ",
+#
+#        "Ήυ",
+#        "Ηϋ"
+#    ]
+#    el_cap_acc_digraphs = [
+#        "ΆΥ",
+#        "ΑΫ",
+#
+#        "ΈΥ",
+#        "ΕΫ",
+#
+#        "ΉΥ",
+#        "ΗΫ"
+#    ]
+    el_mp_digraph = [
+        "ΜΠ",
+        "Μπ",
+        "μπ"
+    ]
+    eng_mp_digraph_0 = [
+        "B",
+        "B",
+        "b"
+    ]
+    eng_mp_digraph_1 = [
+        "MP",
+        "Mp",
+        "mp"
+    ]
+    el_xu_digraphs = [
+        "αυ",
+        "ευ",
+        "ηυ"
+    ]
+    eng_xu_digraphs = [
+        "av",
+        "af",
+        "ev",
+        "ef",
+        "iv",
+        "if"
+    ]
+#   List related to xu lists
+    xu_sound_modifiers_v = [
+#    β, γ, δ, ζ, λ, μ, ν, ρ, α, ε, η, ι, ο, υ, ω
+        "β",
+        "γ",
+        "δ",
+        "ζ",
+        "λ",
+        "μ",
+        "ν",
+        "ρ",
+
+        "α",
+        "ε",
+        "η",
+        "ι",
+        "ο",
+        "υ",
+        "ω"
+    ]
+    xu_sound_modifiers_f = [
+#        θ, κ, ξ, π, σ, τ, φ, χ, ψ, empty space
+        "θ",
+        "κ",
+        "ξ",
+        "π",
+        "σ",
+        "τ",
+        "φ",
+        "χ",
+        "ψ"
+    ]
+    print(string)
+    new_string = string
+#   Replace ς with σ
+    new_string = new_string.replace("ς","σ")
+#   if el_low_acc_digraphs or el_mix_acc_digraphs or el_cap_acc_digraphs in string:
+#   Do nothing, we don't care with current implementation
+
+#   Replace all digraphs so they're ignored by the simple transcription
+    for i in el_simple_digraphs:
+        if i in string:
+            print(new_string.replace(i, eng_simple_digraphs[el_simple_digraphs.index(i)]))
+            new_string = new_string.replace(i, eng_simple_digraphs[el_simple_digraphs.index(i)])
+    for i in el_simple_cap_digraphs:
+        if i in string:
+            new_string = new_string.replace(i, eng_simple_cap_digraphs[el_simple_digraphs.index(i)])
+#   TODO: ROMANIZE ACCENTS
+    for i in el_mp_digraph:
+        if i in string:
+            if string.startswith(i):
+                new_string = new_string.replace(i, eng_mp_digraph_0[el_mp_digraph.index(i)], 1)
+            new_string = new_string.replace(i, eng_mp_digraph_1[el_mp_digraph.index(i)])
+    for i in el_xu_digraphs:
+        if i in string:
+            for loop in xu_sound_modifiers_f:
+                if string[string.find(i)+1] in loop:
+                    new_string = new_string.replace(i, eng_xu_digraphs[el_xu_digraphs.index(i)+1])
+            for loop in xu_sound_modifiers_v:
+                if string[string.find(i)+1] in loop:
+                    new_string = new_string.replace(i, eng_xu_digraphs[el_xu_digraphs.index(i)])
+#   Simple transliteration
+    for i in el_low:
+        if i in el_low:
+            new_string = new_string.replace(i, eng_low[el_low.index(i)])
+    for i in el_cap:
+        if i in el_cap:
+            new_string = new_string.replace(i, eng_cap[el_cap.index(i)])
+    #Normalize capital letters if needed
+    print(string)
+    for i in el_mono_digraph_sub:
+        if string.startswith(i):
+            if string[2].islower() == True:
+                new_string = new_string.replace(new_string[1], new_string[1].lower())
+    return new_string
+